EXHIBIT 4.5


                            SOUTHWEST BANCORP, INC.

                                      AND

                     STATE STREET BANK AND TRUST COMPANY,
                                  AS TRUSTEE

                                   INDENTURE

                    9.30% SUBORDINATED DEBENTURES DUE 2027

                           DATED AS OF JUNE 4, 1997.

 
                               TABLE OF CONTENTS



                                                                                                           PAGE
                                                                                                      
ARTICLE I.                 DEFINITIONS....................................................................  1
      SECTION 1.1          DEFINITIONS OF TERMS...........................................................  1
ARTICLE II.                ISSUE, DESCRIPTION, TERMS, CONDITIONS REGISTRATION AND
                                EXCHANGE OF THE DEBENTURES................................................. 7
      SECTION 2.1          DESIGNATION AND PRINCIPAL AMOUNT...............................................  7
      SECTION 2.2          MATURITY.......................................................................  7
      SECTION 2.3          FORM AND PAYMENT...............................................................  8
      SECTION 2.4          [Intentionally Omitted.........................................................  8
      SECTION 2.5          INTEREST.......................................................................  8
      SECTION 2.6          EXECUTION AND AUTHENTICATIONS..................................................  9
      SECTION 2.7          REGISTRATION OF TRANSFER AND EXCHANGE.......................................... 10
      SECTION 2.8          TEMPORARY DEBENTURES........................................................... 10
      SECTION 2.9          MUTILATED, DESTROYED, LOST OR STOLEN DEBENTURES................................ 11
      SECTION 2.10         CANCELLATION................................................................... 11
      SECTION 2.11         BENEFIT OF INDENTURE........................................................... 11
      SECTION 2.12         AUTHENTICATION AGENT........................................................... 12
ARTICLE III.               REDEMPTION OF DEBENTURES....................................................... 12
      SECTION 3.1          REDEMPTION..................................................................... 12
      SECTION 3.2          SPECIAL EVENT REDEMPTION....................................................... 12
      SECTION 3.3          OPTIONAL REDEMPTION BY COMPANY................................................. 13
      SECTION 3.4          NOTICE OF REDEMPTION........................................................... 13
      SECTION 3.5          PAYMENT UPON REDEMPTION........................................................ 14
      SECTION 3.6          NO SINKING FUND................................................................ 14
ARTICLE IV.                EXTENSION OF INTEREST PAYMENT PERIOD........................................... 14
      SECTION 4.1          EXTENSION OF INTEREST PAYMENT PERIOD........................................... 14
      SECTION 4.2          NOTICE OF EXTENSION............................................................ 15
      SECTION 4.3          LIMITATION ON TRANSACTIONS..................................................... 15
ARTICLE V.                 PARTICULAR COVENANTS OF THE COMPANY............................................ 15
      SECTION 5.1          PAYMENT OF PRINCIPAL AND INTEREST.............................................. 15
      SECTION 5.2          MAINTENANCE OF AGENCY.......................................................... 15
      SECTION 5.3          PAYING AGENTS.................................................................. 16
      SECTION 5.4          APPOINTMENT TO FILL VACANCY IN OFFICE OF TRUSTEE............................... 16
      SECTION 5.5          COMPLIANCE WITH CONSOLIDATION PROVISIONS....................................... 17
      SECTION 5.6          LIMITATION ON TRANSACTIONS..................................................... 17
      SECTION 5.7          COVENANTS AS TO THE TRUST...................................................... 17
      SECTION 5.8          COVENANTS AS TO PURCHASES...................................................... 17
  ARTICLE VI.              DEBENTUREHOLDERS' LISTS AND REPORTS BY THE COMPANY AND THE TRUSTEE............. 17
        SECTION 6.1        COMPANY TO FURNISH TRUSTEE NAMES AND ADDRESSES OF DEBENTUREHOLDERS............. 17
  
  
                                        -i-

 
 
 
                                                                                                       
     SECTION 6.2         PRESERVATION OF INFORMATION COMMUNICATIONS WITH DEBENTUREHOLDERS................... 18
     SECTION 6.3         REPORTS BY THE COMPANY............................................................. 18
     SECTION 6.4         REPORTS BY THE TRUSTEE............................................................. 18

ARTICLE VII.             REMEDIES OF THE TRUSTEE AND DEBENTUREHOLDERS ON EVENT OF DEFAULT................... 19
     SECTION 7.1         EVENTS OF DEFAULT.................................................................. 19
     SECTION 7.2         COLLECTION OF INDEBTEDNESS AND SUITS FOR ENFORCEMENT BY TRUSTEE.................... 20
     SECTION 7.3         APPLICATION OF MONEYS COLLECTED.................................................... 21
     SECTION 7.4         LIMITATION ON SUITS................................................................ 21
     SECTION 7.5         RIGHTS AND REMEDIES CUMULATIVE; DELAY OR OMISSION NOT WAIVER....................... 22
     SECTION 7.6         CONTROL BY DEBENTUREHOLDERS........................................................ 22
     SECTION 7.7         UNDERTAKING TO PAY COSTS........................................................... 23

ARTICLE VIII.            FORM OF DEBENTURE AND ORIGINAL ISSUE............................................... 23
     SECTION 8.1         FORM OF DEBENTURE.................................................................. 23
     SECTION 8.2         ORIGINAL ISSUE OF DEBENTURES....................................................... 23

ARTICLE IX.              CONCERNING THE TRUSTEE............................................................. 23
     SECTION 9.1         CERTAIN DUTIES AND RESPONSIBILITIES TRUSTEE........................................ 23
     SECTION 9.2         NOTICE OF DEFAULTS................................................................. 24
     SECTION 9.3         CERTAIN RIGHTS OF TRUSTEE.......................................................... 24
     SECTION 9.4         TRUSTEE NOT RESPONSIBLE FOR RECITALS, ETC.......................................... 25
     SECTION 9.5         MAY HOLD DEBENTURES................................................................ 26
     SECTION 9.6         MONEYS HELD IN TRUST............................................................... 26
     SECTION 9.7         COMPENSATION AND REIMBURSEMENT..................................................... 26
     SECTION 9.8         RELIANCE ON OFFICERS' CERTIFICATE.................................................. 26
     SECTION 9.9         DISQUALIFICATION; CONFLICTING INTERESTS............................................ 26
     SECTION 9.10        CORPORATE TRUSTEE REQUIRED; ELIGIBILITY............................................ 26
     SECTION 9.11        RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR.................................. 27
     SECTION 9.12        ACCEPTANCE OF APPOINTMENT BY SUCCESSOR............................................. 28
     SECTION 9.13        MERGER, CONVERSION, CONSOLIDATION OR SUCCESSION TO BUSINESS........................ 28
     SECTION 9.14        PREFERENTIAL COLLECTION OF CLAIMS AGAINST THE COMPANY.............................. 28

ARTICLE X.               CONCERNING THE DEBENTUREHOLDERS.................................................... 29
     SECTION 10.1        EVIDENCE OF ACTION BY HOLDERS...................................................... 29
     SECTION 10.2        PROOF OF EXECUTION BY DEBENTUREHOLDERS............................................. 29
     SECTION 10.3        WHO MAY BE DEEMED OWNERS........................................................... 29
     SECTION 10.4        CERTAIN DEBENTURES OWNED BY COMPANY DISREGARDED.................................... 30
     SECTION 10.5        ACTIONS BINDING ON FUTURE DEBENTUREHOLDERS......................................... 30

ARTICLE XI.              SUPPLEMENTAL INDENTURES............................................................ 30
     SECTION 11.1        SUPPLEMENTAL INDENTURES WITHOUT THE CONSENT OF DEBENTUREHOLDERS.................... 30
     SECTION 11.2        SUPPLEMENTAL INDENTURES WITH CONSENT OF DEBENTUREHOLDERS........................... 31
     SECTION 11.3        EFFECT OF SUPPLEMENTAL INDENTURES.................................................. 31
     SECTION 11.4        DEBENTURES AFFECTED BY SUPPLEMENTAL INDENTURES..................................... 31
 




                                     -ii-

 
 
                                                                                                         
     SECTION 11.5        EXECUTION OF SUPPLEMENTAL INDENTURES............................................... 32
                                                                                                            
ARTICLE XII.             SUCCESSOR CORPORATION.............................................................. 32
     SECTION 12.1        COMPANY MAY CONSOLIDATE, ETC....................................................... 32
     SECTION 12.2        SUCCESSOR CORPORATION SUBSTITUTED.................................................. 32
     SECTION 12.3        EVIDENCE OF CONSOLIDATION, ETC. TO TRUSTEE......................................... 33
                                                                                                            
ARTICLE XIII.            SATISFACTION AND DISCHARGE......................................................... 33
     SECTION 13.1        SATISFACTION AND DISCHARGE OF INDENTURE............................................ 33
     SECTION 13.2        DISCHARGE OF OBLIGATIONS........................................................... 33
     SECTION 13.3        DEPOSITED MONEYS TO BE HELD IN TRUST............................................... 34
     SECTION 13.4        PAYMENT OF MONIES HELD BY PAYING AGENTS............................................ 34
     SECTION 13.5        REPAYMENT TO COMPANY............................................................... 34
                                                                                                            
ARTICLE XIV.             IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS AND DIRECTORS.................... 34
     SECTION 14.1        NO RECOURSE........................................................................ 34
                                                                                                            
ARTICLE XV.              MISCELLANEOUS PROVISIONS........................................................... 35
     SECTION 15.1        EFFECT ON SUCCESSORS AND ASSIGNS................................................... 35
     SECTION 15.2        ACTIONS BY SUCCESSOR............................................................... 35
     SECTION 15.3        SURRENDER OF COMPANY POWERS........................................................ 35
     SECTION 15.4        NOTICES............................................................................ 35
     SECTION 15.5        GOVERNING LAW...................................................................... 35
     SECTION 15.6        TREATMENT OF DEBENTURES AS DEBT.................................................... 35
     SECTION 15.7        COMPLIANCE CERTIFICATES AND OPINIONS............................................... 35
     SECTION 15.8        PAYMENTS ON BUSINESS DAYS.......................................................... 36
     SECTION 15.9        CONFLICT WITH TRUST INDENTURE ACT.................................................. 36
     SECTION 15.10       COUNTERPARTS....................................................................... 36
     SECTION 15.11       SEPARABILITY....................................................................... 36
     SECTION 15.12       ASSIGNMENT......................................................................... 36
     SECTION 15.13       ACKNOWLEDGMENT OF RIGHTS; RIGHT OF SET-OFF......................................... 36
                                                                                                            
ARTICLE XVI.             SUBORDINATION OF DEBENTURES........................................................ 37
     SECTION 16.1        AGREEMENT TO SUBORDINATE........................................................... 37
     SECTION 16.2        DEFAULT ON SENIOR DEBT, SUBORDINATED DEBT ADDITIONAL SENIOR OBLIGATIONS............ 37 
     SECTION 16.3        LIQUIDATION; DISSOLUTION; BANKRUPTCY............................................... 37
     SECTION 16.4        SUBROGATION........................................................................ 38
     SECTION 16.5        TRUSTEE TO EFFECTUATE SUBORDINATION................................................ 39
     SECTION 16.6        NOTICE BY THE COMPANY.............................................................. 39
     SECTION 16.7        RIGHTS OF THE TRUSTEE; HOLDERS OF SENIOR INDEBTEDNESS.............................. 40
     SECTION 16.8        SUBORDINATION MAY NOT BE IMPAIRED.................................................. 40

 



                                     -iii-

 
                             CROSS-REFERENCE TABLE



Section of
Trust Indenture Act                                       Section of      
of 1939, as amended                                        Indenture    
- -------------------                                    ----------------- 

                                                    
310(a)................................................              9.10
310(b)................................................         9.9, 9.11
310(c)................................................    Not Applicable
311(a)................................................              9.14
311(b)................................................              9.14
311(c)................................................    Not Applicable
312(a)................................................       6.1, 6.2(a)
312(b)................................................            6.2(c)
312(c)................................................            6.2(c)
313(a)................................................            6.4(a)
313(b)................................................            6.4(b)
313(c)................................................    6.4(a), 6.4(b)
313(d)................................................            6.4(c)
314(a)................................................            6.3(a)
314(b)................................................    Not Applicable
314(c)................................................              15.7
314(d)................................................    Not Applicable
314(e)................................................              15.7
314(f)................................................    Not Applicable
315(a)................................................       9.1(a), 9.3
315(b)................................................               9.2
315(c)................................................            9.1(a)
315(d)................................................            9.1(b)
315(e)................................................               7.7
316(a)................................................          1.1, 7.6
316(b)................................................            7.4(b)
316(c)................................................           10.1(b)
317(a)................................................               7.2
317(b)................................................               5.3
318(a)................................................              15.9


Note: This Cross-Reference Table does not constitute part of this Indenture and
shall not affect the interpretation of any of its terms or provisions.

                                     -iv-

 
                                   INDENTURE

  INDENTURE, dated as of June 4, 1997, between SOUTHWEST BANCORP, INC., an
Oklahoma corporation (the "Company") and STATE STREET BANK AND TRUST COMPANY, a
trust company duly organized and existing under the laws of the Commonwealth of
Massachusetts, as trustee (the "Trustee");

                                   RECITALS

  WHEREAS, for its lawful corporate purposes, the Company has duly authorized
the execution and delivery of this Indenture to provide for the issuance of
securities to be known as its 9.30% Subordinated Debentures due 2027
(hereinafter referred to as the "Debentures"), the form and substance of such
Debentures and the terms, provisions and conditions thereof to be set forth as
provided in this Indenture;

  WHEREAS, SBI Capital Trust, a Delaware statutory business trust (the "Trust"),
has offered to the public Twenty Five Million Twelve Thousand Five Hundred
Dollars ($25,012,500) aggregate liquidation amount of its Preferred Securities
(as defined herein) and proposes to invest the proceeds from such offering,
together with the proceeds of the issuance and sale by the Trust to the Company
of Seven Hundred Seventy Four Thousand Dollars ($774,000) aggregate liquidation
amount of its Common Securities (as defined herein), in Twenty Five Million
Seven Hundred Eighty Six Thousand Five Hundred Dollars ($25,786,500) aggregate
principal amount of the Debentures; and

  WHEREAS, the Company has requested that the Trustee execute and deliver this
Indenture; and

  WHEREAS, all requirements necessary to make this Indenture a valid instrument
in accordance with its terms, and to make the Debentures, when executed by the
Company and authenticated and delivered by the Trustee, the valid obligations of
the Company, have been performed, and the execution and delivery of this
Indenture have been duly authorized in all respects:

  WHEREAS, to provide the terms and conditions upon which the Debentures are to
be authenticated, issued and delivered, the Company has duly authorized the
execution of this Indenture; and

  WHEREAS, all things necessary to make this Indenture a valid agreement of the
Company, in accordance with its terms, have been done.

  NOW, THEREFORE, in consideration of the premises and the purchase of the
Debentures by the holders thereof, it is mutually covenanted and agreed as
follows for the equal and ratable benefit of the holders of the Debentures:

                                  ARTICLE I.

                                  DEFINITIONS
                                        
SECTION 1.1. DEFINITIONS OF TERMS

  The terms defined in this Section 1.1 (except as in this Indenture otherwise
expressly provided or unless the context otherwise requires) for all purposes of
this Indenture and of any indenture supplemental hereto shall have the
respective meanings specified in this Section 1.1 and shall include the plural
as well as the singular. All other terms used in this Indenture that are defined
in the Trust Indenture Act, or that are by reference in the Trust Indenture Act
defined in the Securities Act (except as herein otherwise expressly provided or
unless the context otherwise requires), shall have the meanings assigned to such
terms in the Trust Indenture Act and in the Securities Act as in force at the
date of the execution of this instrument. All accounting terms used herein and
not expressly defined shall have the meanings assigned to such terms in
accordance with Generally Accepted Accounting Principles.


                                      -1-

 
  "Accelerated Maturity Date" means if the Company elects to accelerate the
Maturity Date in accordance with Section 2.2(c), the date selected by the
Company which is prior to the Scheduled Maturity Date, but is after July 31,
2002.

  "Additional Interest" shall have the meaning set forth in Section 2.5.

  "Additional Senior Obligations" means all indebtedness of the Company whether
incurred on or prior to the date of this Indenture or thereafter incurred, for
claims in respect of derivative products such as interest and foreign exchange
rate contracts, commodity contracts and similar arrangements; provided, however,
that Additional Senior Obligations does not include claims in respect of Senior
Debt or Subordinated Debt or obligations which, by their terms, are expressly
stated to be not superior in right of payment to the Debentures or to rank pari
passu in right of payment with the Debentures. For purposes of this definition,
"claim" shall have the meaning assigned thereto in Section 101(4) of the United
States Bankruptcy Code of 1978, as amended.

  "Administrative Trustees" shall have the meaning set forth in the Trust
Agreement.

  "Affiliate" means, with respect to a specified Person, (a) any Person directly
or indirectly owning, controlling or holding with power to vote 10% or more of
the outstanding voting securities or other ownership interests of the specified
Person; (b) any Person 10% or more of whose outstanding voting securities or
other ownership interests are directly or indirectly owned, controlled or held
with power to vote by the specified Person; (c) any Person directly or
indirectly controlling, controlled by, or under common control with the
specified Person; (d) a partnership in which the specified Person is a general
partner; (e) any officer or director of the specified Person; and (f) if the
specified Person is an individual, any entity of which the specified Person is
an officer, director or general partner.

  "Authenticating Agent" means an authenticating agent with respect to the
Debentures appointed by the Trustee pursuant to Section 2.12.

  "Bankruptcy Law" means Title 11, U.S. Code, or any similar federal or state
law for the relief of debtors.

  "Board of Directors" means the Board of Directors of the Company or any duly
authorized committee of such Board.

  "Board Resolution" means a copy of a resolution certified by the Secretary or
an Assistant Secretary of the Company to have been duly adopted by the Board of
Directors and to be in full force and effect on the date of such certification.

  "Business Day" means, with respect to the Debentures, any day other than a
Saturday or a Sunday or a day on which federal or state banking institutions in
the City of New York, are authorized or required by law, executive order or
regulation to close, or a day on which the Corporate Trust Office of the Trustee
or the Property Trustee is closed for business.

  "Capital Treatment Event" means the receipt by the Trust of an Opinion of
Counsel, rendered by a law firm experienced in such matters to the effect that,
as a result of any amendment to or any change (including any announced
prospective change) in the laws (or any regulations thereunder) of the United
States or any political subdivision thereof or therein, or as a result of any
official administrative pronouncement or judicial decision interpreting or
applying such laws or regulations, which amendment or change is effective or
such proposed change, pronouncement or decision is announced on or after the
date of issuance of the Preferred Securities under the Trust Agreement, there is
more than an insubstantial risk of impairment of the Company's ability to treat
the aggregate Liquidation Amount of the Preferred Securities (or any substantial
portion thereof) as "Tier 1 Capital" (or the then equivalent thereof) for
purposes of the capital adequacy guidelines of the Federal Reserve, as then
applicable to the Company, provided, however, that the inability of the Company
to treat all or any portion of the Liquidation Amount of the Preferred
Securities as Tier 1 Capital shall not constitute the basis of a Capital


                                      -2-

 
Treatment Event if such inability results from the Company having cumulative
preferred capital in excess of the amount which may qualify for treatment as
Tier 1 Capital under applicable capital adequacy guidelines of the Federal
Reserve.

  "Certificate" means a certificate signed by the principal executive officer,
the principal financial officer, the principal accounting officer, the treasurer
or any vice president of the Company. The Certificate need not comply with the
provisions of Section 15.7.

  "Change in 1940 Act Law" shall have the meaning set forth in the definition of
"Investment Company Event."

  "Commission" means the Securities and Exchange Commission, as from time to
time constituted, created under the Exchange Act, or, if at any time after the
execution of this instrument such Commission is not existing and performing the
duties now assigned to it under the Trust Indenture Act, then the body
performing such duties at such time.

  "Common Securities" means undivided beneficial interests in the assets of the
Trust which rank pari passu with the Preferred Securities; provided, however,
that upon the occurrence of an Event of Default, the rights of holders of Common
Securities to payment in respect of (i) distributions, and (ii) payments upon
liquidation, redemption and otherwise, are subordinated to the rights of holders
of Preferred Securities.

  "Company" means Southwest Bancorp, Inc., a corporation duly organized and
existing under the laws of the State of Oklahoma, and, subject to the provisions
of Article XII, shall also include its successors and assigns.

  "Compounded Interest" shall have the meaning set forth in Section 4.1.

  "Corporate Trust Office" means the office of the Trustee at which, at any
particular time, its corporate trust business shall be principally administered,
which office at the date hereof is located at Two International Place, 4th
Floor, Boston, Massachusetts 02110, Attention: Corporate Trust Department.

  "Coupon Rate" shall have the meaning set forth in Section 2.5.

  "Custodian" means any receiver, trustee, assignee, liquidator, or similar
official under any Bankruptcy Law.

  "Debentures" shall have the meaning set forth in the Recitals hereto.

  "Debentureholder," "holder of Debentures," "registered holder," or other
similar term, means the Person or Persons in whose name or names a particular
Debenture shall be registered on the books of the Company or the Trustee kept
for that purpose in accordance with the terms of this Indenture.

  "Debenture Register" shall have the meaning set forth in Section 2.7(b).

  "Debenture Registrar" shall have the meaning set forth in Section 2.7(b).

  "Debt" means with respect to any Person, whether recourse is to all or a
portion of the assets of such Person and whether or not contingent, (i) every
obligation of such Person for money borrowed; (ii) every obligation of such
Person evidenced by bonds, debentures, notes or other similar instruments,
including obligations incurred in connection with the acquisition of property,
assets or businesses; (iii) every reimbursement obligation of such Person with
respect to letters of credit, bankers' acceptances or similar facilities issued
for the account of such Person; (iv) every obligation of such Person issued or
assumed as the deferred purchase price of property or services (but excluding
trade accounts payable or accrued liabilities arising in the ordinary course of
business); (v) every capital lease obligation of such Person; and (vi) and every
obligation of the type referred to in clauses (i) through (v) of another Person
and all dividends of another Person the payment of which, in either case, such
Person has guaranteed or is responsible or liable, directly or indirectly, as
obligor or otherwise.

                                      -3-

 
  "Default" means any event, act or condition that with notice or lapse of time,
or both, would constitute an Event of Default.

  "Deferred Interest" shall have the meaning set forth in Section 4.1.

  "Dissolution Event" means that as a result of the occurrence and continuation
of a Special Event, the Trust is to be dissolved in accordance with the Trust
Agreement and the Debentures held by the Property Trustee are to be distributed
to the holders of the Trust Securities issued by the Trust pro rata in
accordance with the Trust Agreement.

  "Distribution" shall have the meaning set forth in the Trust Agreement.

  "Event of Default" means, with respect to the Debentures, any event specified
in Section 7.1, which has continued for the period of time, if any, and after
the giving of the notice, if any, therein designated.

  "Exchange Act," means the Securities Exchange Act of 1934, as amended, as in
effect at the date of execution of this instrument.

  "Extended Interest Payment Period" shall have the meaning set forth in Section
4.1.

  "Extended Maturity Date" means if the Company elects to extend the Maturity
Date in accordance with Section 2.2(b), the date selected by the Company which
is after the Scheduled Maturity Date but before July 31, 2036.

  "Federal Reserve" means the Board of Governors of the Federal Reserve System.

  "Generally Accepted Accounting Principles" means such accounting principles as
are generally accepted at the time of any computation required hereunder.

  "Governmental Obligations" means securities that are (i) direct obligations of
the United States of America for the payment of which its full faith and credit
is pledged; or (ii) obligations of a Person controlled or supervised by and
acting as an agency or instrumentality of the United States of America, the
payment of which is unconditionally guaranteed as a full faith and credit
obligation by the United States of America that, in either case, are not
callable or redeemable at the option of the issuer thereof, and shall also
include a depositary receipt issued by a bank (as defined in Section 3(a)(2) of
the Securities Act) as custodian with respect to any such Governmental
Obligation or a specific payment of principal of or interest on any such
Governmental Obligation held by such custodian for the account of the holder of
such depositary receipt; provided, however, that (except as required by law)
such custodian is not authorized to make any deduction from the amount payable
to the holder of such depositary receipt from any amount received by the
custodian in respect of the Governmental Obligation or the specific payment of
principal of or interest on the Governmental Obligation evidenced by such
depositary receipt.

  "Herein," "hereof," and "hereunder," and other words of similar import, refer
to this Indenture as a whole and not to any particular Article, Section or other
subdivision.

  "Indenture" means this instrument as originally executed or as it may from
time to time be supplemented or amended by one or more indentures supplemental
hereto entered into in accordance with the terms hereof.

  "Interest Payment Date" shall have the meaning set forth in Section 2.5.

  "Investment Company Act," means the Investment Company Act of 1940, as
amended, as in effect at the date of execution of this instrument.

  "Investment Company Event" means the receipt by the Trust of an Opinion of
Counsel, rendered by a law firm experienced in such matters, to the effect that,
as a result of the occurrence of a change in law or regulation or a

                                      -4-

 
change in interpretation or application of law or regulation by any legislative
body, court, governmental agency or regulatory authority (a "Change in 1940 Act
Law"), the Trust is or shall be considered an "investment company" that is
required to be registered under the Investment Company Act, which Change in 1940
Act Law becomes effective on or after the date of original issuance of the
Preferred Securities under the Trust Agreement.

  "Maturity Date" means the date on which the Debentures mature and on which the
principal shall be due and payable together with all accrued and unpaid interest
thereon including Compounded Interest and Additional Interest, if any.

  "Ministerial Action" shall have the meaning set forth in Section 3.2.

  "Officers' Certificate" means a certificate signed by the President or a Vice
President and by the Treasurer or an Assistant Treasurer or the Controller or an
Assistant Controller or the Secretary or an Assistant Secretary of the Company
that is delivered to the Trustee in accordance with the terms hereof. Each such
certificate shall include the statements provided for in Section 15.7, if and to
the extent required by the provisions thereof.

  "Opinion of Counsel" means an opinion in writing of legal counsel, who may be
an employee of or counsel for the Company, that is delivered to the Trustee in
accordance with the terms hereof. Each such opinion shall include the statements
provided for in Section 15.7, if and to the extent required by the provisions
thereof.

  "Outstanding," when used with reference to the Debentures, means, subject to
the provisions of Section 10.4, as of any particular time, all Debentures
theretofore authenticated and delivered by the Trustee under this Indenture,
except (a) Debentures theretofore canceled by the Trustee or any paying agent,
or delivered to the Trustee or any paying agent for cancellation or that have
previously been canceled; (b) Debentures or portions thereof for the payment or
redemption of which moneys or Governmental Obligations in the necessary amount
shall have been deposited in trust with the Trustee or with any paying agent
(other than the Company) or shall have been set aside and segregated in trust by
the Company (if the Company shall act as its own paying agent); provided,
however, that if such Debentures or portions of such Debentures are to be
redeemed prior to the maturity thereof, notice of such redemption shall have
been given as in Article III provided, or provision satisfactory to the Trustee
shall have been made for giving such notice; and (c) Debentures in lieu of or in
substitution for which other Debentures shall have been authenticated and
delivered pursuant to the terms of Section 2.7.

  "Paying Agent" means any paying agent or co-paying agent appointed pursuant to
Section 5.3.

  "Person" means any individual, corporation, partnership, joint-venture, joint-
stock company, unincorporated organization or government or any agency or
political subdivision thereof.

  "Predecessor Debenture" means every previous Debenture evidencing all or a
portion of the same debt as that evidenced by such particular Debenture; and,
for the purposes of this definition, any Debenture authenticated and delivered
under Section 2.9 in lieu of a lost, destroyed or stolen Debenture shall be
deemed to evidence the same debt as the lost, destroyed or stolen Debenture.

  "Preferred Securities" means undivided beneficial interests in the assets of
the Trust which rank pari passu with Common Securities issued by the Trust;
provided, however, that upon the occurrence of an Event of Default, the rights
of holders of Common Securities to payment in respect of (i) distributions, and
(ii) payments upon liquidation, redemption and otherwise, are subordinated to
the rights of holders of Preferred Securities.

  "Preferred Securities Guarantee" means any guarantee that the Company may
enter into with the Trustee or other Persons that operate directly or indirectly
for the benefit of holders of Preferred Securities.

  "Property Trustee" has the meaning set forth in the Trust Agreement.

                                      -5-

 
  "Responsible Officer" when used with respect to the Trustee means the Chairman
of the Board of Directors, the President, any Vice President, the Secretary, the
Treasurer, any trust officer, any corporate trust officer or any other officer
or assistant officer of the Trustee customarily performing functions similar to
those performed by the Persons who at the time shall be such officers,
respectively, or to whom any corporate trust matter is referred because of his
or her knowledge of and familiarity with the particular subject.

  "Scheduled Maturity Date" means July 31, 2027.

  "Securities Act," means the Securities Act of 1933, as amended, as in effect
at the date of execution of this instrument.

  "Senior Debt" means the principal of (and premium, if any) and interest, if
any (including interest accruing on or after the filing of any petition in
bankruptcy or for reorganization relating to the Company whether or not such
claim for post-petition interest is allowed in such proceeding), on Debt,
whether incurred on or prior to the date of this Indenture or thereafter
incurred, unless, in the instrument creating or evidencing the same or pursuant
to which the same is outstanding, it is provided that such obligations are not
superior in right of payment to the Debentures or to other Debt which is pari
passu with, or subordinated to, the Debentures; provided, however, that Senior
Debt shall not be deemed to include (i) any Debt of the Company which, when
incurred and without respect to any election under section 1111(b) of the United
States Bankruptcy Code of 1978, as amended, was without recourse to the Company;
(ii) any Debt of the Company to any of its subsidiaries; (iii) Debt to any
employee of the Company; (iv) Debt which by its terms is subordinated to trade
accounts payable or accrued liabilities arising in the ordinary course of
business to the extent that payments made to the holders of such Debt by the
holders of the Debentures as a result of the subordination provisions of this
Indenture would be greater than they otherwise would have been as a result of
any obligation of such holders to pay amounts over to the obligees on such trade
accounts payable or accrued liabilities arising in the ordinary course of
business as a result of subordination provisions to which such Debt is subject;
and (v) Debt which constitutes Subordinated Debt.

  "Senior Indebtedness" shall have the meaning set forth in Section 16.1.

  "Special Event" means a Tax Event, a Capital Treatment Event or an Investment
Company Event.

  "Subordinated Debt" means the principal of (and premium, if any) and interest,
if any (including interest accruing on or after the filing of any petition in
bankruptcy or for reorganization relating to the Company whether or not such
claim for post-petition interest is allowed in such proceeding), on Debt,
whether incurred on or prior to the date of this Indenture or thereafter
incurred, which is by its terms expressly provided to be junior and subordinate
to other Debt of the Company (other than the Debentures).

  "Subsidiary" means, with respect to any Person, (i) any corporation at least a
majority of whose outstanding Voting Stock shall at the time be owned, directly
or indirectly, by such Person or by one or more of its Subsidiaries or by such
Person and one or more of its Subsidiaries; (ii) any general partnership, joint
venture, trust or similar entity, at least a majority of whose outstanding
partnership or similar interests shall at the time be owned by such Person, or
by one or more of its Subsidiaries, or by such Person and one or more of its
Subsidiaries; and (iii) any limited partnership of which such Person or any of
its Subsidiaries is a general partner.

  "Tax Event" means the receipt by the Trust of an Opinion of Counsel, rendered
by a law firm experienced in such matters, to the effect that, as a result of
any amendment to, or change (including any announced prospective change) in, the
laws (or any regulations thereunder) of the United States or any political
subdivision or taxing authority thereof or therein, or as a result of any
official administrative pronouncement or judicial decision interpreting or
applying such laws or regulations, which amendment or change is effective or
which pronouncement or decision is announced on or after the date of issuance of
the Preferred Securities under the Trust Agreement, there is more than an
insubstantial risk that (i) the Trust is, or shall be within 90 days after the
date of such Opinion of Counsel, subject to United States federal income tax
with respect to income received or accrued on the Debentures; (ii) interest

                                      -6-

 
payable by the Company on the Debentures is not, or within 90 days after the
date of such Opinion of Counsel, shall not be, deductible by the Company, in
whole or in part, for United States federal income tax purposes; or (iii) the
Trust is, or shall be within 90 days after the date of such Opinion of Counsel,
subject to more than a de minimis amount of other taxes, duties, assessments or
other governmental charges. The Trust or the Company shall request and receive
such Opinion of Counsel with regard to such matters within a reasonable period
of time after the Trust or the Company shall have become aware of the possible
occurrence of any of the events described in clauses (i) through (iii) above.

  "Trust" means SBI Capital Trust, a Delaware statutory business trust.

  "Trust Agreement" means the Amended and Restated Trust Agreement, dated June
4, 1997, of the Trust.

  "Trustee" means State Street Bank and Trust Company and, subject to the
provisions of Article IX, shall also include its successors and assigns, and, if
at any time there is more than one Person acting in such capacity hereunder,
"Trustee" shall mean each such Person.

  "Trust Indenture Act," means the Trust Indenture Act of 1939, as amended,
subject to the provisions of Sections 11.1, 11.2, and 12.1, as in effect at the
date of execution of this instrument.

  "Trust Securities" means the Common Securities and Preferred Securities,
collectively.

  "Voting Stock," as applied to stock of any Person, means shares, interests,
participations or other equivalents in the equity interest (however designated)
in such Person having ordinary voting power for the election of a majority of
the directors (or the equivalent) of such Person, other than shares, interests,
participations or other equivalents having such power only by reason of the
occurrence of a contingency.

                                  ARTICLE II

                     ISSUE, DESCRIPTION, TERMS, CONDITIONS
                  REGISTRATION AND EXCHANGE OF THE DEBENTURES

SECTION 2.1 DESIGNATION AND PRINCIPAL AMOUNT

  There is hereby authorized Debentures designated the "9.30% Subordinated
Debentures due 2027," limited in aggregate principal amount up to Twenty Five
Million Seven Hundred Eighty Six Thousand Five Hundred Dollars ($25,786,500)
which amount shall be as set forth in any written order of the Company for the
authentication and delivery of Debentures pursuant to Section 2.6.

SECTION 2.2. MATURITY

 (a) The Maturity Date shall be either:

     (i)    the Scheduled Maturity Date; or

     (ii)   if the Company elects to extend the Maturity Date beyond the
            Scheduled Maturity Date in accordance with Section 2.2(b), the
            Extended Maturity Date; or

     (iii)  if the Company elects to accelerate the Maturity Date to be a date
            prior to the Scheduled Maturity Date in accordance with Section
            2.2(c), the Accelerated Maturity Date.

 (b) The Company may at any time before the day which is 90 days before the
     Scheduled Maturity Date, elect to extend the Maturity Date to the Extended
     Maturity Date, provided that the Company has received the prior approval
     of the Federal Reserve, if then required under applicable capital


                                      -7-

 
            guidelines or policies of the Federal Reserve, and further provided
            that the following conditions in this Section 2.2(b) are satisfied
            both at the date the Company gives notice in accordance with Section
            2.2(d) of its election to extend the Maturity Date and at the
            Scheduled Maturity Date:

     (i)    the Company is not in bankruptcy, otherwise insolvent or in
            liquidation;

     (ii)   the Company is not in default in the payment of interest or
            principal on the Debentures;

     (iii)  the Trust is not in arrears on payments of Distributions on the
            Trust Securities issued by it and no deferred Distributions are
            accumulated; and

     (iv)   the Company has a rating on its Senior Debt of investment grade.

  (c) The Company may, on one occasion, at any time before the day which is 90
      days before the Scheduled Maturity Date and after July 31, 2002, elect to
      shorten the Maturity Date to the Accelerated Maturity Date, provided that
      the Company has received the prior approval of the Federal Reserve, if
      then required under applicable capital guidelines or policies of the
      Federal Reserve.

  (d) If the Company elects to extend the Maturity Date in accordance with
      Section 2.2(b), the Company shall give notice to the registered holders of
      the Debentures, the Property Trustee and the Trust of the extension of the
      Maturity Date and the Extended Maturity Date at least 90 days and no more
      than 180 days before the Scheduled Maturity Date.

  (e) If the Company elects to accelerate the Maturity Date in accordance with
      Section 2.2(c), the Company shall give notice to the registered holders of
      the Debentures, the Property Trustee and the Trust of the acceleration of
      the Maturity Date and the Accelerated Maturity Date at least 90 days and
      no more than 180 days before the Accelerated. Maturity Date.

SECTION 2.3. FORM AND PAYMENT

  The Debentures shall be issued in fully registered certificated form without
interest coupons. Principal and interest on the Debentures issued in
certificated form shall be payable, the transfer of such Debentures shall be
registrable and such Debentures shall be exchangeable for Debentures bearing
identical terms and provisions at the office or agency of the Trustee; provided,
however, that payment of interest may be made at the option of the Company by
check mailed to the holder at such address as shall appear in the Debenture
Register or by wire transfer to an account maintained by the holder as specified
in the Debenture Register, provided that the holder provides proper transfer
instructions by the regular record date. Notwithstanding the foregoing, so long
as the holder of any Debentures is the Property Trustee, the payment of the
principal of and interest (including Compounded Interest and Additional
Interest, if any) on such Debentures held by the Property Trustee shall be made
at such place and to such account as may be designated by the Property Trustee.

SECTION 2.4. [Intentionally Omitted]

SECTION 2.5. INTEREST

  (a) Each Debenture shall bear interest at the rate of 9.30% per annum (the
"Coupon Rate") from the original date of issuance until the principal thereof
becomes due and payable, and on any overdue principal and (to the extent that
payment of such interest is enforceable under applicable law) on any overdue
installment of interest at the Coupon Rate, compounded quarterly, payable
(subject to the provisions of Article IV) quarterly in arrears on January 31,
April 30, July 31, and October 31 of each year (each, an "Interest Payment
Date," commencing on July 31, 1997), to the Person in whose name such Debenture
or any Predecessor Debenture is registered, at the close of business on

                                      -8-

 
the regular record date for such interest installment, which shall be the
fifteenth day of the last month of the calendar quarter.

  (b) The amount of interest payable for any period shall be computed on the
basis of a 360-day year of twelve 30-day months. The amount of interest payable
for any period shorter than a full quarterly period for which interest is
computed shall be computed on the basis of the number of days elapsed in a 360-
day year of twelve 30-day months. In the event that any date on which interest
is payable on the Debentures is not a Business Day, then payment of interest
payable on such date shall be made on the next succeeding day which is a
Business Day (and without any interest or other payment in respect of any such
delay) with the same force and effect as if made on the date such payment was
originally payable.

  (c) If, at any time while the Property Trustee is the holder of any
Debentures, the Trust or the Property Trustee is required to pay any taxes,
duties, assessments or governmental charges of whatever nature (other than
withholding taxes) imposed by the United States, or any other taxing authority,
then, in any case, the Company shall pay as additional interest ("Additional
Interest") on the Debentures held by the Property Trustee, such additional
amounts as shall be required so that the net amounts received and retained by
the Trust and the Property Trustee after paying such taxes, duties, assessments
or other governmental charges shall be equal to the amounts the Trust and the
Property Trustee would have received had no such taxes, duties, assessments or
other government charges been imposed.

SECTION 2.6. EXECUTION AND AUTHENTICATIONS

  (a) The Debentures shall be signed on behalf of the Company by its Chief
Executive Officer, President or one of its Vice Presidents, under its corporate
seal attested by its Secretary or one of its Assistant Secretaries. Signatures
may be in the form of a manual or facsimile signature. The Company may use the
facsimile signature of any Person who shall have been a Chief Executive Officer,
President or Vice President thereof, or of any Person who shall have been a
Secretary or Assistant Secretary thereof, notwithstanding the fact that at the
time the Debentures shall be authenticated and delivered or disposed of such
Person shall have ceased to be the Chief Executive Officer, President or a Vice
President, or the Secretary or an Assistant Secretary, of the Company. The seal
of the Company may be in the form of a facsimile of such seal and may be
impressed, affixed, imprinted or otherwise reproduced on the Debentures. The
Debentures may contain such notations, legends or endorsements required by law,
stock exchange rule or usage. Each Debenture shall be dated the date of its
authentication by the Trustee.

  (b) A Debenture shall not be valid until manually authenticated by an
authorized signatory of the Trustee, or by an Authenticating Agent. Such
signature shall be conclusive evidence that the Debenture so authenticated has
been duly authenticated and delivered hereunder and that the holder is entitled
to the benefits of this Indenture.

  (c) At any time and from time to time after the execution and delivery of this
Indenture, the Company may deliver Debentures executed by the Company to the
Trustee for authentication, together with a written order of the Company for the
authentication and delivery of such Debentures signed by its Chief Executive
Officer, President or any Vice President and its Treasurer or any Assistant
Treasurer, and the Trustee in accordance with such written order shall
authenticate and deliver such Debentures.

  (d) In authenticating such Debentures and accepting the additional
responsibilities under this Indenture in relation to such Debentures, the
Trustee shall be entitled to receive, and (subject to Section 9.1) shall be
fully protected in relying upon, an Opinion of Counsel stating that the form and
terms thereof have been established in conformity with the provisions of this
Indenture.

  (e) The Trustee shall not be required to authenticate such Debentures if the
issue of such Debentures pursuant to this Indenture shall affect the Trustee's
own rights, duties or immunities under the Debentures and this Indenture or
otherwise in a manner that is not reasonably acceptable to the Trustee.

                                      -9-

 
SECTION 2.7. REGISTRATION OF TRANSFER AND EXCHANGE

  (a) Debentures may be exchanged upon presentation thereof at the office or
agency of the Company designated for such purpose in the Borough of Manhattan,
the City of New York, or at the office of the Debenture Registrar, for other
Debentures and for a like aggregate principal amount, upon payment of a sum
sufficient to cover any tax or other governmental charge in relation thereto,
all as provided in this Section 2.7. In respect of any Debentures so surrendered
for exchange, the Company shall execute, the Trustee shall authenticate and such
office or agency shall deliver in exchange therefor the Debenture or Debentures
that the Debentureholder making the exchange shall be entitled to receive,
bearing numbers not contemporaneously outstanding.

  (b) The Company shall keep, or cause to be kept, at its office or agency
designated for such purpose in the Borough of Manhattan, the City of New York,
or at the office of the Debenture Registrar, or such other location designated
by the Company a register or registers (herein referred to as the "Debenture
Register") in which, subject to such reasonable regulations as it may prescribe,
the Company shall register the Debentures and the transfers of Debentures as in
this Article II provided and which at all reasonable times shall be open for
inspection by the Trustee. The registrar for the purpose of registering
Debentures and transfer of Debentures as herein provided shall initially be the
Trustee and thereafter as may be appointed by the Company as authorized by Board
Resolution (the "Debenture Registrar"). Upon surrender for transfer of any
Debenture at the office or agency of the Company designated for such purpose,
the Company shall execute, the Trustee shall authenticate and such office or
agency shall deliver in the name of the transferee or transferees a new
Debenture or Debentures for a like aggregate principal amount. All Debentures
presented or surrendered for exchange or registration of transfer, as provided
in this Section 2.7, shall be accompanied (if so required by the Company or the
Debenture Registrar) by a written instrument or instruments of transfer, in form
satisfactory to the Company or the Debenture Registrar, duly executed by the
registered holder or by such holder's duly authorized attorney in writing.

  (c) No service charge shall be made for any exchange or registration of
transfer of Debentures, or issue of new Debentures in case of partial
redemption, but the Company may require payment of a sum sufficient to cover any
tax or other governmental charge in relation thereto, other than exchanges
pursuant to Section 2.8, Section 3.5(b) and Section 11.4 not involving any
transfer.

  (d) The Company shall not be required (i) to issue, exchange or register the
transfer of any Debentures during a period beginning at the opening of business
15 days before the day of the mailing of a notice of redemption of less than all
the Outstanding Debentures and ending at the close of business on the day of
such mailing; nor (ii) to register the transfer of or exchange any Debentures or
portions thereof called for redemption.

SECTION 2.8. TEMPORARY DEBENTURES

  Pending the preparation of definitive Debentures, the Company may execute, and
the Trustee shall authenticate and deliver, temporary Debentures (printed,
lithographed, or typewritten). Such temporary Debentures shall be substantially
in the form of the definitive Debentures in lieu of which they are issued, but
with such omissions, insertions and variations as may be appropriate for
temporary Debentures, all as may be determined by the Company. Every temporary
Debenture shall be executed by the Company and be authenticated by the Trustee
upon the same conditions and in substantially the same manner, and with like
effect, as the definitive Debentures. Without unnecessary delay the Company
shall execute and shall furnish definitive Debentures and thereupon any or all
temporary Debentures may be surrendered in exchange therefor (without charge to
the holders), at the office or agency of the Company designated for the purpose
in the Borough of Manhattan, the City of New York, and the Trustee shall
authenticate and such office or agency shall deliver in exchange for such
temporary Debentures an equal aggregate principal amount of definitive
Debentures, unless the Company advises the Trustee to the effect that definitive
Debentures need not be executed and furnished until further notice from the
Company. Until so exchanged, the temporary Debentures shall be entitled to the
same benefits under this Indenture as definitive Debentures authenticated and
delivered hereunder.

                                     -10-

 
SECTION 2.9. MUTILATED, DESTROYED, LOST OR STOLEN DEBENTURES

  (a) In case any temporary or definitive Debenture shall become mutilated or be
destroyed, lost or stolen, the Company (subject to the next succeeding sentence)
shall execute, and upon the Company's request the Trustee (subject as aforesaid)
shall authenticate and deliver, a new Debenture bearing a number not
contemporaneously outstanding, in exchange and substitution for the mutilated
Debenture, or in lieu of and in substitution for the Debenture so destroyed,
lost or stolen. In every case the applicant for a substituted Debenture shall
furnish to the Company and the Trustee such security or indemnity as may be
required by them to save each of them harmless, and, in every case of
destruction, loss or theft, the applicant shall also furnish to the Company and
the Trustee evidence to their satisfaction of the destruction, loss or theft of
the applicant's Debenture and of the ownership thereof. The Trustee may
authenticate any such substituted Debenture and deliver the same upon the
written request or authorization of the Chairman, President or any Vice
President and the Treasurer or any Assistant Treasurer of the Company. Upon the
issuance of any substituted Debenture, the Company may require the payment of a
sum sufficient to cover any tax or other governmental charge that may be imposed
in relation thereto and any other expenses (including the fees and expenses of
the Trustee) connected therewith. In case any Debenture that has matured or is
about to mature shall become mutilated or be destroyed, lost or stolen, the
Company may, instead of issuing a substitute Debenture, pay or authorize the
payment of the same (without surrender thereof except in the case of a mutilated
Debenture) if the applicant for such payment shall furnish to the Company and
the Trustee such security or indemnity as they may require to save them
harmless, and, in case of destruction, loss or theft, evidence to the
satisfaction of the Company and the Trustee of the destruction, loss or theft of
such Debenture and of the ownership thereof.

  (b) Every replacement Debenture issued pursuant to the provisions of this
Section 2.9 shall constitute an additional contractual obligation of the Company
whether or not the mutilated, destroyed, lost or stolen Debenture shall be found
at any time, or be enforceable by anyone, and shall be entitled to all the
benefits of this Indenture equally and proportionately with any and all other
Debentures duly issued hereunder. All Debentures shall be held and owned upon
the express condition that the foregoing provisions are exclusive with respect
to the replacement or payment of mutilated, destroyed, lost or stolen
Debentures, and shall preclude (to the extent lawful) any and all other rights
or remedies, notwithstanding any law or statute existing or hereafter enacted to
the contrary with respect to the replacement or payment of negotiable
instruments or other securities without their surrender.

SECTION 2.10. CANCELLATION

  All Debentures surrendered for the purpose of payment, redemption, exchange or
registration of transfer shall, if surrendered to the Company or any paying
agent, be delivered to the Trustee for cancellation, or, if surrendered to the
Trustee, shall be canceled by it, and no Debentures shall be issued in lieu
thereof except as expressly required or permitted by any of the provisions of
this Indenture. On request of the Company at the time of such surrender, the
Trustee shall deliver to the Company canceled Debentures held by the Trustee. In
the absence of such request the Trustee may dispose of canceled Debentures in
accordance with its standard procedures and deliver a certificate of disposition
to the Company. If the Company shall otherwise acquire any of the Debentures,
however, such acquisition shall not operate as a redemption or satisfaction of
the indebtedness represented by such Debentures unless and until the same are
delivered to the Trustee for cancellation.

SECTION 2.11. BENEFIT OF INDENTURE

  Nothing in this Indenture or in the Debentures, express or implied, shall give
or be construed to give to any Person, other than the parties hereto and the
holders of the Debentures (and, with respect to the provisions of Article XVI,
the holders of Senior Indebtedness) any legal or equitable right, remedy or
claim under or in respect of this Indenture, or under any covenant, condition or
provision herein contained; all such covenants, conditions and provisions being
for the sole benefit of the parties hereto and of the holders of the Debentures
(and, with respect to the provisions of Article XVI, the holders of Senior
Indebtedness).

                                     -11-

 
SECTION 2.12. AUTHENTICATION AGENT

  (a) So long as any of the Debentures remain Outstanding there may be an
Authenticating Agent for any or all such Debentures, which the Trustee shall
have the right to appoint. Said Authenticating Agent shall be authorized to act
on behalf of the Trustee to authenticate Debentures issued upon exchange,
transfer or partial redemption thereof, and Debentures so authenticated shall be
entitled to the benefits of this Indenture and shall be valid and obligatory for
all purposes as if authenticated by the Trustee hereunder. All references in
this Indenture to the authentication of Debentures by the Trustee shall be
deemed to include authentication by an Authenticating Agent. Each Authenticating
Agent shall be acceptable to the Company and shall be a corporation that has a
combined capital and surplus, as most recently reported or determined by it,
sufficient under the laws of any jurisdiction under which it is organized or in
which it is doing business to conduct a trust business, and that is otherwise
authorized under such laws to conduct such business and is subject to
supervision or examination by federal or state authorities. If at any time any
Authenticating Agent shall cease to be eligible in accordance with these
provisions, it shall resign immediately.

  (b) Any Authenticating Agent may at any time resign by giving written notice
of resignation to the Trustee and to the Company. The Trustee may at any time
(and upon request by the Company shall) terminate the agency of any
Authenticating Agent by giving written notice of termination to such
Authenticating Agent and to the Company. Upon resignation, termination or
cessation of eligibility of any Authenticating Agent, the Trustee may appoint an
eligible successor Authenticating Agent acceptable to the Company. Any successor
Authenticating Agent, upon acceptance of its appointment hereunder, shall become
vested with all the rights, powers and duties of its predecessor hereunder as if
originally named as an Authenticating Agent pursuant hereto.

                                 ARTICLE III.

                           REDEMPTION OF DEBENTURES


SECTION 3.1. REDEMPTION

  Subject to the Company having received prior approval of the Federal Reserve,
if then required under the applicable capital guidelines or policies of the
Federal Reserve, the Company may redeem the Debentures issued hereunder on and
after the dates set forth in and in accordance with the terms of this Article
III.

SECTION 3.2. SPECIAL EVENT REDEMPTION

  Subject to the Company having received the prior approval of the Federal
Reserve, if then required under the applicable capital guidelines or policies of
the Federal Reserve, if a Special Event has occurred and is continuing, then,
notwithstanding Section 3.3(a) but subject to Section 3.3(b), the Company shall
have the right upon not less than 30 days nor more than 60 days notice to the
holders of the Debentures to redeem the Debentures, in whole but not in part,
for cash within 180 days following the occurrence of such Special Event (the
"180-Day Period") at a redemption price equal to 100% of the principal amount to
be redeemed plus any accrued and unpaid interest thereon to the date of such
redemption (the "Redemption Price"), provided that if at the time there is
available to the Company the opportunity to eliminate, within the 180-Day
Period, a Tax Event by taking some ministerial action (a "Ministerial Action"),
such as filing a form or making an election, or pursuing some other similar
reasonable measure which has no adverse effect on the Company, the Trust or the
holders of the Trust Securities issued by the Trust, the Company shall pursue
such Ministerial Action in lieu of redemption, and, provided further, that the
Company shall have no right to redeem the Debentures while the Trust is pursuing
any Ministerial Action pursuant to its obligations under the Trust Agreement.
The Redemption Price shall be paid prior to 12:00 noon, New York time, on the
date of such redemption or such earlier time as the Company determines, provided
that the Company shall deposit with the Trustee an amount sufficient to pay the
Redemption Price by 10:00 a.m., New York time, on the date such Redemption Price
is to be paid.

                                     -12-

 
SECTION 3.3. OPTIONAL REDEMPTION BY COMPANY

  (a) Subject to the provisions of Section 3.3(b), except as otherwise may be
specified in this Indenture, the Company shall have the right to redeem the
Debentures, in whole or in part, from time to time, on or after July 31, 2002,
at a Redemption Price equal to 100% of the principal amount to be redeemed plus
any accrued and unpaid interest thereon to the date of such redemption. Any
redemption pursuant to this Section 3.3(a) shall be made upon not less than 30
days nor more than 60 days notice to the holder of the Debentures, at the
Redemption Price. If the Debentures are only partially redeemed pursuant to this
Section 3.3, the Debentures shall be redeemed pro rata or by lot or in such
other manner as the Trustee shall deem appropriate and fair in its discretion.
The Redemption Price shall be paid prior to 12:00 noon, New York time, on the
date of such redemption or at such earlier time as the Company determines
provided that the Company shall deposit with the Trustee an amount sufficient to
pay the Redemption Price by 10:00 a.m., New York time, on the date such
Redemption Price is to be paid.

  (b) If a partial redemption of the Debentures would result in the delisting of
the Preferred Securities issued by the Trust from The Nasdaq Stock Market's
National Market or any national securities exchange or other organization on
which the Preferred Securities are then listed, the Company shall not be
permitted to effect such partial redemption and may only redeem the Debentures
in whole.

SECTION 3.4. NOTICE OF REDEMPTION

  (a) In case the Company shall desire to exercise such right to redeem all or,
as the case may be, a portion of the Debentures in accordance with the right
reserved so to do, the Company shall, or shall cause the Trustee to, upon
receipt of 45 days' written notice from the Company (which notice shall, in the
event of a partial redemption, include a representation to the effect that such
partial redemption shall not result in the delisting of the Preferred Securities
as described in Section 3.3(b) above), give notice of such redemption to holders
of the Debentures to be redeemed by mailing, first class postage prepaid, a
notice of such redemption, not less than 30 days and not more than 60 days
before the date fixed for redemption to such holders at their last addresses as
they shall appear upon the Debenture Register unless a shorter period is
specified in the Debentures to be redeemed. Any notice that is mailed in the
manner herein provided shall be conclusively presumed to have been duly given,
whether or not the registered holder receives the notice. In any case, failure
duly to give such notice to the holder of any Debenture designated for
redemption in whole or in part, or any defect in the notice, shall not affect
the validity of the proceedings for the redemption of any other Debentures. In
the case of any redemption of Debentures prior to the expiration of any
restriction on such redemption provided in the terms of such Debentures or
elsewhere in this Indenture, the Company shall furnish the Trustee with an
Officers' Certificate evidencing compliance with any such restriction. Each such
notice of redemption shall specify the date fixed for redemption and the
Redemption Price and shall state that payment of the Redemption Price shall be
made at the office or agency of the Company in the Borough of Manhattan, the
City of New York or at the Corporate Trust Office, upon presentation and
surrender of such Debentures, that interest accrued to the date fixed for
redemption shall be paid as specified in said notice and that from and after
said date interest shall cease to accrue. If less than all the Debentures are to
be redeemed, the notice to the holders of the Debentures shall specify the
particular Debentures to be redeemed. If the Debentures are to be redeemed in
part only, the notice shall state the portion of the principal amount thereof to
be redeemed and shall state that on and after the redemption date, upon
surrender of such Debenture, a new Debenture or Debentures in principal amount
equal to the unredeemed portion thereof shall be issued.

  (b) If less than all the Debentures are to be redeemed, the Company shall give
the Trustee at least 45 days' notice in advance of the date fixed for redemption
as to the aggregate principal amount of Debentures to be redeemed, and thereupon
the Trustee shall select, by lot or in such other manner as it shall deem
appropriate and fair in its discretion, the portion or portions (equal to $25 or
any integral multiple thereof) of the Debentures to be redeemed and shall
thereafter promptly notify the Company in writing of the numbers of the
Debentures to be redeemed, in whole or in part. The Company may, if and whenever
it shall so elect pursuant to the terms hereof, by delivery of instructions
signed on its behalf by its President or any Vice President, instruct the
Trustee or any paying agent to call all or any part of the Debentures for
redemption and to give notice of redemption in the manner set forth in this

                                     -13-

 
Section 3.4, such notice to be in the name of the Company or its own name as the
Trustee or such paying agent may deem advisable. In any case in which notice of
redemption is to be given by the Trustee or any such paying agent, the Company
shall deliver or cause to be delivered to, or permit to remain with, the Trustee
or such paying agent, as the case may be, such Debenture Register, transfer
books or other records, or suitable copies or extracts therefrom, sufficient to
enable the Trustee or such paying agent to give any notice by mail that may be
required under the provisions of this Section 3.4.

SECTION 3.5. PAYMENT UPON REDEMPTION

  (a) If the giving of notice of redemption shall have been completed as above
provided, the Debentures or portions of Debentures to be redeemed specified in
such notice shall become due and payable on the date and at the place stated in
such notice at the applicable Redemption Price, and interest on such Debentures
or portions of Debentures shall cease to accrue on and after the date fixed for
redemption, unless the Company shall default in the payment of such Redemption
Price with respect to any such Debenture or portion thereof. On presentation and
surrender of such Debentures on or after the date fixed for redemption at the
place of payment specified in the notice, said Debentures shall be paid and
redeemed at the Redemption Price (but if the date fixed for redemption is an
interest payment date, the interest installment payable on such date shall be
payable to the registered holder at the close of business on the applicable
record date pursuant to Section 3.3).

  (b) Upon presentation of any Debenture that is to be redeemed in part only,
the Company shall execute and the Trustee shall authenticate and the office or
agency where the Debenture is presented shall deliver to the holder thereof, at
the expense of the Company, a new Debenture of authorized denomination in
principal amount equal to the unredeemed portion of the Debenture so presented.

SECTION 3.6. NO SINKING FUND

 The Debentures are not entitled to the benefit of any sinking fund.

                                  ARTICLE IV.

                     EXTENSION OF INTEREST PAYMENT PERIOD

SECTION 4.1. EXTENSION OF INTEREST PAYMENT PERIOD

  So long as no Event of Default has occurred and is continuing, the Company
shall have the right, at any time and from time to time during the term of the
Debentures, to defer payments of interest by extending the interest payment
period of such Debentures for a period not exceeding 20 consecutive quarters
(the "Extended Interest Payment Period"), during which Extended Interest Payment
Period no interest shall be due and payable; provided that no Extended Interest
Payment Period may extend beyond the Maturity Date. Interest, the payment of
which has been deferred because of the extension of the interest payment period
pursuant to this Section 4.1, shall bear interest thereon at the Coupon Rate
compounded quarterly for each quarter of the Extended Interest Payment Period
("Compounded Interest"). At the end of the Extended Interest Payment Period, the
Company shall calculate (and deliver such calculation to the Trustee) and pay
all interest accrued and unpaid on the Debentures, including any Additional
Interest and Compounded Interest (together, "Deferred Interest") that shall be
payable to the holders of the Debentures in whose names the Debentures are
registered in the Debenture Register on the first record date after the end of
the Extended Interest Payment Period. Before the termination of any Extended
Interest Payment Period, the Company may further extend such period, provided
that such period together with all such further extensions thereof shall not
exceed 20 consecutive quarters, or extend beyond the Maturity Date of the
Debentures. Upon the termination of any Extended Interest Payment Period and
upon the payment of all Deferred Interest then due, the Company may commence a
new Extended Interest Payment Period, subject to the foregoing requirements. No
interest shall be due and payable during an Extended Interest Payment Period,
except at the end thereof, but the Company may prepay at any time all or any
portion of the interest accrued during an Extended Interest Payment Period.

                                     -14-

 
SECTION 4.2. NOTICE OF EXTENSION

  (a) If the Property Trustee is the only registered holder of the Debentures at
the time the Company elects an Extended Interest Payment Period, the Company
shall give written notice to the Administrative Trustees, the Property Trustee
and the Trustee of its election of such Extended Interest Payment Period two
Business Days before the earlier of (i) the next succeeding date on which
Distributions on the Trust Securities issued by the Trust are payable; or (ii)
the date the Trust is required to give notice of the record date, or the date
such Distributions are payable, to The Nasdaq Stock Market's National Market or
other applicable self-regulatory organization or to holders of the Preferred
Securities issued by the Trust, but in any event at least one Business Day
before such record date.

  (b) If the Property Trustee is not the only holder of the Debentures at the
time the Company elects an Extended Interest Payment Period, the Company shall
give the holders of the Debentures and the Trustee written notice of its
election of such Extended Interest Payment Period at least two Business Days
before the earlier of (i) the next succeeding Interest Payment Date; or (ii) the
date the Company is required to give notice of the record or payment date of
such interest payment to The Nasdaq Stock Market's National Market or other
applicable self-regulatory organization or to holders of the Debentures.

  (c) The quarter in which any notice is given pursuant to paragraphs (a) or (b)
of this Section 4.2 shall be counted as one of the 20 quarters permitted in the
maximum Extended Interest Payment Period permitted under Section 4.1.

SECTION 4.3. LIMITATION ON TRANSACTIONS

  If (i) the Company shall exercise its right to defer payment of interest as
provided in Section 4.1; or (ii) there shall have occurred any Event of Default,
then (a) the Company shall not declare or pay any dividend on, make any
distributions with respect to, or redeem, purchase, acquire or make a
liquidation payment with respect to, any of its capital stock; (b) the Company
shall not make any payment of interest, principal or premium, if any, or repay,
repurchase or redeem any debt securities issued by the Company which rank pari
passu with or junior to the Debentures; provided, however, that notwithstanding
the foregoing the Company may make payments pursuant to its obligations under
the Preferred Securities Guarantee; and (c) the Company shall not redeem,
purchase or acquire less than all of the Outstanding Debentures or any of the
Preferred Securities.

                                  ARTICLE V.

                      PARTICULAR COVENANTS OF THE COMPANY

SECTION 5.1. PAYMENT OF PRINCIPAL AND INTEREST

  The Company shall duly and punctually pay or cause to be paid the principal of
and interest on the Debentures at the time and place and in the manner provided
herein.

SECTION 5.2. MAINTENANCE OF AGENCY

  So long as any of the Debentures remain Outstanding, the Company shall
maintain an office or agency in the Borough of Manhattan, the City of New York,
and at such other location or locations as may be designated as provided in this
Section 5.2, where (i) Debentures may be presented for payment; (ii) Debentures
may be presented as hereinabove authorized for registration of transfer and
exchange; and (iii) notices and demands to or upon the Company in respect of the
Debentures and this Indenture may be given or served, such designation to
continue with respect to such office or agency until the Company shall, by
written notice signed by its President or a Vice President and delivered to the
Trustee, designate some other office or agency for such purposes or any of them.
If at any time the Company shall fail to maintain any such required office or
agency or shall fail to furnish the Trustee with the address thereof, such
presentations, notices and demands may be made or served at the Corporate Trust
Office of the Trustee, and the Company hereby appoints the Trustee as its agent
to receive all such presentations, notices and demands. In addition to any such
office or agency, the Company may from time to time designate one or more

                                     -15-

 
offices or agencies outside of the Borough of Manhattan, the City of New York,
where the Debentures may be presented for registration or transfer and for
exchange in the manner provided herein, and the Company may from time to time
rescind such designation as the Company may deem desirable or expedient;
provided, however, that no such designation or rescission shall in any manner
relieve the Company of its obligation to maintain any such office or agency in
the Borough of Manhattan, the City of New York, for the purposes above
mentioned. The Company shall give the Trustee prompt written notice of any such
designation or rescission thereof.

SECTION 5.3. PAYING AGENTS

  (a) The Trustee shall act as the Paying Agent.  If the Company shall appoint
one or more paying agents for the Debentures, other than the Trustee, the
Company shall cause each such paying agent to execute and deliver to the Trustee
an instrument in which such agent shall agree with the Trustee, subject to the
provisions of this Section 5.3:

  (i) that it shall hold all sums held by it as such agent for the payment of
the principal of or interest on the Debentures (whether such sums have been paid
to it by the Company or by any other obligor of such Debentures) in trust for
the benefit of the Persons entitled thereto;

  (ii) that it shall give the Trustee notice of any failure by the Company (or
by any other obligor of such Debentures) to make any payment of the principal of
or interest on the Debentures when the same shall be due and payable;

  (iii) that it shall, at any time during the continuance of any failure
referred to in the preceding paragraph (a)(ii) above, upon the written request
of the Trustee, forthwith pay to the Trustee all sums so held in trust by such
Paying Agent; and

  (iv) that it shall perform all other duties of Paying Agent as set forth in
this Indenture.

  (b) If the Company shall act as its own Paying Agent with respect to the
Debentures, it shall on or before each due date of the principal of or interest
on such Debentures, set aside, segregate and hold in trust for the benefit of
the Persons entitled thereto a sum sufficient to pay such principal or interest
so becoming due on Debentures until such sums shall be paid to such Persons or
otherwise disposed of as herein provided and shall promptly notify the Trustee
of such action, or any failure (by it or any other obligor on such Debentures)
to take such action. Whenever the Company shall have one or more Paying Agents
for the Debentures, it shall, prior to each due date of the principal of or
interest on any Debentures, deposit with the Paying Agent a sum sufficient to
pay the principal or interest so becoming due, such sum to be held in trust for
the benefit of the Persons entitled to such principal or interest, and (unless
such Paying Agent is the Trustee) the Company shall promptly notify the Trustee
of this action or failure so to act.

  (c) Notwithstanding anything in this Section 5.3 to the contrary, (i) the
agreement to hold sums in trust as provided in this Section 5.3 is subject to
the provisions of Section 13.3 and 13.4; and (ii) the Company may at any time,
for the purpose of obtaining the satisfaction and discharge of this Indenture or
for any other purpose, pay, or direct any Paying Agent to pay, to the Trustee
all sums held in trust by the Company or such Paying Agent, such sums to be held
by the Trustee upon the same terms and conditions as those upon which such sums
were held by the Company or such Paying Agent; and, upon such payment by any
Paying Agent to the Trustee, such Paying Agent shall be released from all
further liability with respect to such money.

SECTION 5.4. APPOINTMENT TO FILL VACANCY IN OFFICE OF TRUSTEE

  The Company, whenever necessary to avoid or fill a vacancy in the office of
Trustee, shall appoint, in the manner provided in Section 9.10, a Trustee, so
that there shall at all times be a Trustee hereunder.

                                     -16-

 
SECTION 5.5. COMPLIANCE WITH CONSOLIDATION PROVISIONS

  The Company shall not, while any of the Debentures remain outstanding,
consolidate with, or merge into, or merge into itself, or sell or convey all or
substantially all of its property to, any other company, unless the provisions
of Article XII hereof are complied with.

SECTION 5.6. LIMITATION ON TRANSACTIONS

  If Debentures are issued to the Trust or a trustee of the Trust in connection
with the issuance of Trust Securities by the Trust and (i) there shall have
occurred any event that would constitute an Event of Default; (ii) the Company
shall be in default with respect to its payment of any obligations under the
Preferred Securities Guarantee relating to the Trust; or (iii) the Company shall
have given notice of its election to defer payments of interest on such
Debentures by extending the interest payment period as provided in this
Indenture and such period, or any extension thereof, shall be continuing, then
(a) the Company shall not declare or pay any dividend on, make any distributions
with respect to, or redeem, purchase, acquire or make a liquidation payment with
respect to, any of its capital stock; (b) the Company shall not make any payment
of interest, principal or premium, if any, or repay, repurchase or redeem any
debt securities issued by the Company which rank pari passu with or junior to
the Debentures; provided, however, that the Company may make payments pursuant
to its obligations under the Preferred Securities Guarantee; and (c) the Company
shall not redeem, purchase or acquire less than all of the Outstanding
Debentures or any of the Preferred Securities.

SECTION 5.7. COVENANTS AS TO THE TRUST

  For so long as the Trust Securities of the Trust remain outstanding, the
Company shall (i) maintain 100% direct or indirect ownership of the Common
Securities of the Trust; provided, however, that any permitted successor of the
Company under this Indenture may succeed to the Company's ownership of the
Common Securities; (ii) not voluntarily terminate, wind up or liquidate the
Trust, except upon prior approval of the Federal Reserve, if then so required
under applicable capital guidelines or policies of the Federal Reserve, and use
its reasonable efforts to cause the Trust (a) to remain a business trust, except
in connection with a distribution of Debentures, the redemption of all of the
Trust Securities of the Trust or certain mergers, consolidations or
amalgamations, each as permitted by the Trust Agreement; and (b) to otherwise
continue not to be treated as an association taxable as a corporation for United
States federal income tax purposes; and (iii) use its reasonable efforts to
cause each holder of Trust Securities to be treated as owning an individual
beneficial interest in the Debentures. In connection with the distribution of
the Debentures to the holders of the Preferred Securities issued by the Trust
upon a Dissolution Event, the Company shall use its best efforts to list such
Debentures on The Nasdaq Stock Market's National Market or on such other
exchange as the Preferred Securities are then listed.

SECTION 5.8. COVENANTS AS TO PURCHASES

  Except upon the exercise by the Company of its right to redeem the Debentures
pursuant to Section 3.2 upon the occurrence and continuation of a Special Event,
the Company shall not purchase any Debentures, in whole or in part, from the
Trust prior to July 31, 2002.

                                  ARTICLE VI

                      DEBENTUREHOLDERS' LISTS AND REPORTS
                        BY THE COMPANY AND THE TRUSTEE

SECTION 6.1. COMPANY TO FURNISH TRUSTEE NAMES AND ADDRESSES OF DEBENTUREHOLDERS.

  The Company shall furnish or cause to be furnished to the Trustee (a) on a
quarterly basis on each regular record date (as described in Section 2.5) a
list, in such form as the Trustee may reasonably require, of the names and
addresses of the holders of the Debentures as of such regular record date,


                                     -17-

 
provided that the Company shall not be obligated to furnish or cause to furnish
such list at any time that the list shall not differ in any respect from the
most recent list furnished to the Trustee by the Company (in the event the
Company fails to provide such list on a monthly basis, the Trustee shall be
entitled to rely on the most recent list provided by the Company); and (b) at
such other times as the Trustee may request in writing within 30 days after the
receipt by the Company of any such request, a list of similar form and content
as of a date not more than 15 days prior to the time such list is furnished;
provided, however, that, in either case, no such list need be furnished if the
Trustee shall be the Debenture Registrar .

SECTION 6.2. PRESERVATION OF INFORMATION; COMMUNICATIONS WITH DEBENTUREHOLDERS

  (a) The Trustee shall preserve, in as current a form as is reasonably
practicable, all information as to the names and addresses of the holders of
Debentures contained in the most recent list furnished to it as provided in
Section 6.1 and as to the names and addresses of holders of Debentures received
by the Trustee in its capacity as Debenture Registrar for the Debentures (if
acting in such capacity).

  (b) The Trustee may destroy any list furnished to it as provided in Section
6.1 upon receipt of a new list so furnished.

  (c) Debentureholders may communicate as provided in Section 312(b) of the
Trust Indenture Act with other Debentureholders with respect to their rights
under this Indenture or under the Debentures.

SECTION 6.3. REPORTS BY THE COMPANY

  (a) The Company covenants and agrees to file with the Trustee, within 15 days
after the Company is required to file the same with the Commission, copies of
the annual reports and of the information, documents and other reports (or
copies of such portions of any of the foregoing as the Commission may from time
to time by rules and regulations prescribe) that the Company may be required to
file with the Commission pursuant to Section 13 or Section 15(d) of the Exchange
Act; or, if the Company is not required to file information, documents or
reports pursuant to either of such sections, then to file with the Trustee and
the Commission, in accordance with the rules and regulations prescribed from
time to time by the Commission, such of the supplementary and periodic
information, documents and reports that may be required pursuant to Section 13
of the Exchange Act in respect of a security listed and registered on a national
securities exchange as may be prescribed from time to time in such rules and
regulations.

  (b) The Company covenants and agrees to file with the Trustee and the
Commission, in accordance with the rules and regulations prescribed from to time
by the Commission, such additional information, documents and reports with
respect to compliance by the Company with the conditions and covenants provided
for in this Indenture as may be required from time to time by such rules and
regulations.

  (c) The Company covenants and agrees to transmit by mail, first class postage
prepaid, or reputable overnight delivery service that provides for evidence of
receipt, to the Debentureholders, as their names and addresses appear upon the
Debenture Register, within 30 days after the filing thereof with the Trustee,
such summaries of any information, documents and reports required to be filed by
the Company pursuant to subsections (a) and (b) of this Section 6.3 as may be
required by rules and regulations prescribed from time to time by the
Commission.

SECTION 6.4. REPORTS BY THE TRUSTEE

  (a) On or before July 15 in each year in which any of the Debentures are
Outstanding, the Trustee shall transmit by mail, first class postage prepaid, to
the Debentureholders, as their names and addresses appear upon the Debenture
Register, a brief report dated as of the preceding May 15, if and to the extent
required under Section 313(a) of the Trust Indenture Act.

  (b) The Trustee shall comply with Section 313(b) and 313(c) of the Trust
Indenture Act.

                                     -18-

 
  (c) A copy of each such report shall, at the time of such transmission to
Debentureholders, be filed by the Trustee with the Company, with each stock
exchange upon which any Debentures are listed (if so listed) and also with the
Commission. The Company agrees to notify the Trustee when any Debentures become
listed on any stock exchange.


                                  ARTICLE VII

                 REMEDIES OF THE TRUSTEE AND DEBENTUREHOLDERS
                              ON EVENT OF DEFAULT

SECTION 7.1. EVENTS OF DEFAULT

  (a) Whenever used herein with respect to the Debentures, "Event of Default"
means any one or more of the following events that has occurred and is
continuing:

     (i) the Company defaults in the payment of any installment of interest upon
  any of the Debentures, as and when the same shall become due and payable, and
  continuance of such default for a period of 30 days; provided, however, that a
  valid extension of an interest payment period by the Company in accordance
  with the terms of this Indenture shall not constitute a default in the payment
  of interest for this purpose;

     (ii) the Company defaults in the payment of the principal on the Debentures
  as and when the same shall become due and payable whether at maturity, upon
  redemption, by declaration or otherwise; provided, however, that a valid
  extension of the maturity of such Debentures in accordance with the terms of
  this Indenture shall not constitute a default in the payment of principal;

     (iii) the Company fails to observe or perform any other of its covenants or
  agreements with respect to the Debentures for a period of 90 days after the
  date on which written notice of such failure, requiring the same to be
  remedied and stating that such notice is a "Notice of Default" hereunder,
  shall have been given to the Company by the Trustee, by registered or
  certified mail, or to the Company and the Trustee by the holders of at least
  25% in principal amount of the Debentures at the time Outstanding;

     (iv) the Company pursuant to or within the meaning of any Bankruptcy Law
  (i) commences a voluntary case; (ii) consents to the entry of an order for
  relief against it in an involuntary case; (iii) consents to the appointment of
  a Custodian of it or for all or substantially all of its property; or (iv)
  makes a general assignment for the benefit of its creditors;

     (v) a court of competent jurisdiction enters an order under any Bankruptcy
  Law that (i) is for relief against the Company in an involuntary case; (ii)
  appoints a Custodian of the Company for all or substantially all of its
  property; or (iii) orders the liquidation of the Company, and the order or
  decree remains unstayed and in effect for 90 days; or

     (vi) the Trust shall have voluntarily or involuntarily dissolved, wound-up
  its business or otherwise terminated its existence except in connection with
  (i) the distribution of Debentures to holders of Trust Securities in
  liquidation of their interests in the Trust; (ii) the redemption of all of the
  outstanding Trust Securities of the Trust; or (iii) certain mergers,
  consolidations or amalgamations, each as permitted by the Trust Agreement.

  (b) In each and every such case, unless the principal of all the Debentures
shall have already become due and payable, either the Trustee or the holders of
not less than 25% in aggregate principal amount of the Debentures then
Outstanding hereunder, by notice in writing to the Company (and to the Trustee
if given by such Debentureholders) may declare the principal of all the
Debentures to be due and payable immediately, and upon any such declaration the
same shall become and shall be immediately due and payable, notwithstanding
anything contained in this Indenture or in the Debentures.

  (c) At any time after the principal of the Debentures shall have been so
declared due and payable, and before any judgment or decree for the payment of
the moneys due shall have been obtained or entered as hereinafter provided,

                                     -19-

 
the holders of a majority in aggregate principal amount of the Debentures then
Outstanding hereunder, by written notice to the Company and the Trustee, may
rescind and annul such declaration and its consequences if: (i) the Company has
paid or deposited with the Trustee a sum sufficient to pay all matured
installments of interest upon all the Debentures and the principal of any and
all Debentures that shall have become due otherwise than by acceleration (with
interest upon such principal, and upon overdue installments of interest, at the
rate per annum expressed in the Debentures to the date of such payment or
deposit) and the amount payable to the Trustee under Section 9.7; and (ii) any
and all Events of Default under this Indenture, other than the nonpayment of
principal on Debentures that shall not have become due by their terms, shall
have been remedied or waived as provided in Section 7.6. No such rescission and
annulment shall extend to or shall affect any subsequent default or impair any
right consequent thereon.

  (d) In case the Trustee shall have proceeded to enforce any right with respect
to Debentures under this Indenture and such proceedings shall have been
discontinued or abandoned because of such rescission or annulment or for any
other reason or shall have been determined adversely to the Trustee, then, and
in every such case, the Company and the Trustee shall be restored to their
respective former positions and rights hereunder, and all rights, remedies and
powers of the Company and the Trustee shall continue as though no such
proceedings had been taken.

SECTION 7.2. COLLECTION OF INDEBTEDNESS AND SUITS FOR ENFORCEMENT BY TRUSTEE

  (a) The Company covenants that (1) in case it shall default in the payment of
any installment of interest on any of the Debentures, and such default shall
have continued for a period of 90 Business Days; or (2) in case it shall default
in the payment of the principal of any of the Debentures when the same shall
have become due and payable, whether upon maturity of the Debentures or upon
redemption or upon declaration or otherwise, then, upon demand of the Trustee,
the Company shall pay to the Trustee, for the benefit of the holders of the
Debentures, the whole amount that then shall have been become due and payable on
all such Debentures for principal or interest, or both, as the case may be, with
interest upon the overdue principal and upon overdue installments of interest at
the rate per annum expressed in the Debentures; and (if the Debentures are held
by the Trust or a trustee of the Trust, without duplication of any other amounts
paid by the Trust or trustee in respect thereof) in addition thereto, such
further amount as shall be sufficient to cover the costs and expenses of
collection, and the amount payable to the Trustee under Section 9.7.

  (b) If the Company shall fail to pay such amounts set forth in Section 7.2(a)
forthwith upon such demand, the Trustee, in its own name and as trustee of an
express trust, shall be entitled and empowered to institute any action or
proceedings at law or in equity for the collection of the sums so due and
unpaid, and may prosecute any such action or proceeding to judgment or final
decree, and may enforce any such judgment or final decree against the Company or
other obligor upon the Debentures and collect the moneys adjudged or decreed to
be payable in the manner provided by law out of the property of the Company or
other obligor upon the Debentures, wherever situated.

  (c) In case of any receivership, insolvency, liquidation, bankruptcy,
reorganization, readjustment, arrangement, composition or judicial proceedings
affecting the Company or the creditors or property thereof, the Trustee shall
have power to intervene in such proceedings and take any action therein that may
be permitted by the court and shall (except as may be otherwise provided by law)
be entitled to file such proofs of claim and other papers and documents as may
be necessary or advisable in order to have the claims of the Trustee and of the
holders of the Debentures allowed for the entire amount due and payable by the
Company under this Indenture at the date of institution of such proceedings and
for any additional amount that may become due and payable by the Company after
such date, and to collect and receive any moneys or other property payable or
deliverable on any such claim, and to distribute the same after the deduction of
the amount payable to the Trustee under Section 9.7; and any receiver, assignee
or trustee in bankruptcy or reorganization is hereby authorized by each of the
holders of the Debentures to make such payments to the Trustee, and, in the
event that the Trustee shall consent to the making of such payments directly to
such Debentureholders, to pay to the Trustee any amount due it under Section
9.7.

                                     -20-

 
  (d) All rights of action and of asserting claims under this Indenture, or
under any of the terms established with respect to Debentures, may be enforced
by the Trustee without the possession of any of such Debentures, or the
production thereof at any trial or other proceeding relative thereto, and any
such suit or proceeding instituted by the Trustee shall be brought in its own
name as trustee of an express trust, and any recovery of judgment shall, after
provision for payment to the Trustee of any amounts due under Section 9.7, be
for the ratable benefit of the holders of the Debentures. In case of an Event of
Default hereunder, the Trustee may in its discretion proceed to protect and
enforce the rights vested in it by this Indenture by such appropriate judicial
proceedings as the Trustee shall deem most effectual to protect and enforce any
of such rights, either at law or in equity or in bankruptcy or otherwise,
whether for the specific enforcement of any covenant or agreement contained in
this Indenture or in aid of the exercise of any power granted in this Indenture,
or to enforce any other legal or equitable right vested in the Trustee by this
Indenture or by law. Nothing contained herein shall be deemed to authorize the
Trustee to authorize or consent to or accept or adopt on behalf of any
Debentureholder any plan of reorganization, arrangement, adjustment or
composition affecting the Debentures or the rights of any holder thereof or to
authorize the Trustee to vote in respect of the claim of any Debentureholder in
any such proceeding.

SECTION 7.3. APPLICATION OF MONEYS COLLECTED

  Any moneys collected by the Trustee pursuant to this Article VII with respect
to the Debentures shall be applied in the following order, at the date or dates
fixed by the Trustee and, in case of the distribution of such moneys on account
of principal or interest, upon presentation of the Debentures, and notation
thereon of the payment, if only partially paid, and upon surrender thereof if
fully paid:

     FIRST: To the payment of costs and expenses of collection and of all
  amounts payable to the Trustee under Section 9.7;

     SECOND: To the payment of all Senior Indebtedness of the Company if and to
  the extent required by Article XVI; and

     THIRD: To the payment of the amounts then due and unpaid upon the
  Debentures for principal and interest, in respect of which or for the benefit
  of which such money has been collected, ratably, without preference or
  priority of any kind, according to the amounts due and payable on such
  Debentures for principal and interest, respectively.

SECTION 7.4. LIMITATION ON SUITS

  (a) Except as provided in Section 15.13 hereof, no holder of any Debenture
shall have any right by virtue or by availing of any provision of this Indenture
to institute any suit, action or proceeding in equity or at law upon or under or
with respect to this Indenture or for the appointment of a receiver or trustee,
or for any other remedy hereunder, unless (i) such holder previously shall have
given to the Trustee written notice of an Event of Default and of the
continuance thereof with respect to the Debentures specifying such Event of
Default, as hereinbefore provided; (ii) the holders of not less than 25% in
aggregate principal amount of the Debentures then Outstanding shall have made
written request upon the Trustee to institute such action, suit or proceeding in
its own name as trustee hereunder; (iii) such holder or holders shall have
offered to the Trustee such reasonable indemnity as it may require against the
costs, expenses and liabilities to be incurred therein or thereby; and (iv) the
Trustee for 60 days after its receipt of such notice, request and offer of
indemnity, shall have failed to institute any such action, suit or proceeding;
and (v) during such 60 day period, the holders of a majority in principal amount
of the Debentures do not give the Trustee a direction inconsistent with the
request.

  (b) Notwithstanding anything contained herein to the contrary or any other
provisions of this Indenture, the right of any holder of the Debentures to
receive payment of the principal of and interest on the Debentures, as therein
provided, on or after the respective due dates expressed in such Debenture (or
in the case of redemption, on the redemption date), or to institute suit for the
enforcement of any such payment on or after such respective dates or

                                     -21-

 
redemption date, shall not be impaired or affected without the consent of such
holder and by accepting a Debenture hereunder it is expressly understood,
intended and covenanted by the taker and holder of every Debenture with every
other such taker and holder and the Trustee, that no one or more holders of
Debentures shall have any right in any manner whatsoever by virtue or by
availing of any provision of this Indenture to affect, disturb or prejudice the
rights of the holders of any other of such Debentures, or to obtain or seek to
obtain priority over or preference to any other such holder, or to enforce any
right under this Indenture, except in the manner herein provided and for the
equal, ratable and common benefit of all holders of Debentures. For the
protection and enforcement of the provisions of this Section 7.4, each and every
Debentureholder and the Trustee shall be entitled to such relief as can be given
either at law or in equity.

SECTION 7.5. RIGHTS AND REMEDIES CUMULATIVE; DELAY OR OMISSION NOT WAIVER

  (a) All powers and remedies given by this Article VII to the Trustee or to the
Debentureholders shall, to the extent permitted by law, be deemed cumulative and
not exclusive of any other powers and remedies available to the Trustee or the
holders of the Debentures, by judicial proceedings or otherwise, to enforce the
performance or observance of the covenants and agreements contained in this
Indenture or otherwise established with respect to such Debentures.

  (b) No delay or omission of the Trustee or of any holder of any of the
Debentures to exercise any right or power accruing upon any Event of Default
occurring and continuing as aforesaid shall impair any such right or power, or
shall be construed to be a waiver of any such default or an acquiescence
therein; and, subject to the provisions of Section 7.4, every power and remedy
given by this Article VII or by law to the Trustee or the Debentureholders may
be exercised from time to time, and as often as shall be deemed expedient, by
the Trustee or by the Debentureholders.

SECTION 7.6. CONTROL BY DEBENTUREHOLDERS

  The holders of a majority in aggregate principal amount of the Debentures at
the time Outstanding, determined in accordance with Section 10.4, shall have the
right to direct the time, method and place of conducting any proceeding for any
remedy available to the Trustee, or exercising any trust or power conferred on
the Trustee; provided, however, that such direction shall not be in conflict
with any rule of law or with this Indenture. Subject to the provisions of
Section 9.1, the Trustee shall have the right to decline to follow any such
direction if the Trustee in good faith shall, by a Responsible Officer or
Officers of the Trustee, determine that the proceeding so directed would involve
the Trustee in personal liability. The holders of a majority in aggregate
principal amount of the Debentures at the time Outstanding affected thereby,
determined in accordance with Section 10.4, may on behalf of the holders of all
of the Debentures waive any past default in the performance of any of the
covenants contained herein and its consequences, except (i) a default in the
payment of the principal of or interest on, any of the Debentures as and when
the same shall become due by the terms of such Debentures otherwise than by
acceleration (unless such default has been cured and a sum sufficient to pay all
matured installments of interest and principal has been deposited with the
Trustee (in accordance with Section 7.1(c)); (ii) a default in the covenants
contained in Section 5.6; or (iii) in respect of a covenant or provision hereof
which cannot be modified or amended without the consent of the holder of each
Outstanding Debenture affected; provided, however, that if the Debentures are
held by the Trust or a trustee of the Trust, such waiver or modification to such
waiver shall not be effective until the holders of a majority in liquidation
preference of Trust Securities of the Trust shall have consented to such waiver
or modification to such waiver; provided further, that if the consent of the
holder of each Outstanding Debenture is required, such waiver shall not be
effective until each holder of the Trust Securities of the Trust shall have
consented to such waiver. Upon any such waiver, the default covered thereby
shall be deemed to be cured for all purposes of this Indenture and the Company,
the Trustee and the holders of the Debentures shall be restored to their
respective former positions and rights hereunder; but no such waiver shall
extend to any subsequent or other default or impair any right consequent
thereon.

                                     -22-

 
SECTION 7.7. UNDERTAKING TO PAY COSTS

  All parties to this Indenture agree, and each holder of any Debentures by such
holder's acceptance thereof shall be deemed to have agreed, that any court may
in its discretion require, in any suit for the enforcement of any right or
remedy under this Indenture, or in any suit against the Trustee for any action
taken or omitted by it as Trustee, the filing by any party litigant in such suit
of an undertaking to pay the costs of such suit, and that such court may in its
discretion assess reasonable costs, including reasonable attorneys' fees,
against any party litigant in such suit, having due regard to the merits and
good faith of the claims or defenses made by such party litigant; but the
provisions of this Section 7.8 shall not apply to any suit instituted by the
Trustee, to any suit instituted by any Debentureholder, or group of
Debentureholders holding more than 10% in aggregate principal amount of the
Outstanding Debentures, or to any suit instituted by any Debentureholder for the
enforcement of the payment of the principal of or interest on the Debentures, on
or after the respective due dates expressed in such Debenture or established
pursuant to this Indenture.

                                 ARTICLE VIII

                     FORM OF DEBENTURE AND ORIGINAL ISSUE

SECTION 8.1. FORM OF DEBENTURE

  The Debenture and the Trustee's Certificate of Authentication to be endorsed
thereon are to be substantially in the forms contained as Exhibit A attached
hereto and incorporated herein by reference.

SECTION 8.2. ORIGINAL ISSUE OF DEBENTURES.

  Debentures in the aggregate principal amount of Twenty Five Million Seven
Hundred Eighty Six Thousand Five Hundred Dollars ($25,786,500) (reflecting the
exercise in full of the Underwriter's Option (as such terms are defined in
Underwriting Agreement, dated May 29, 1997, by and among the Company, the Trust
and Stifel Nicolaus & Company, Incorporated)) may, upon execution of this
Indenture, be executed by the Company and delivered to the Trustee for
authentication.  The Trustee shall thereupon authenticate and deliver said
Debentures to or upon the written order of the Company, signed by its Chairman,
its Vice Chairman, its President, or any Vice President and its Treasurer or an
Assistant Treasurer, without any further action by the Company.

                                  ARTICLE IX 

                            CONCERNING THE TRUSTEE

SECTION 9.1. CERTAIN DUTIES AND RESPONSIBILITIES TRUSTEE

  (a) The Trustee, prior to the occurrence of an Event of Default and after the
curing of all Events of Default that may have occurred, shall undertake to
perform with respect to the Debentures such duties and only such duties as are
specifically set forth in this Indenture, and no implied covenants shall be read
into this Indenture against the Trustee. In case an Event of Default has
occurred that has not been cured or waived, the Trustee shall exercise such of
the rights and powers vested in it by this Indenture, and use the same degree of
care and skill in their exercise, as a prudent man would exercise or use under
the circumstances in the conduct of his own affairs.

  (b) No provision of this Indenture shall be construed to relieve the Trustee
from liability for its own negligent action, its own negligent failure to act,
or its own willful misconduct, except that:

     (1) prior to the occurrence of an Event of Default and after the curing or
  waiving of all such Events of Default that may have occurred:

                                     -23-

 
          (i) the duties and obligations of the Trustee shall with respect to
     the Debentures be determined solely by the express provisions of this
     Indenture, and the Trustee shall not be liable with respect to the
     Debentures except for the performance of such duties and obligations as are
     specifically set forth in this Indenture, and no implied covenants or
     obligations shall be read into this Indenture against the Trustee; and

          (ii) in the absence of bad faith on the part of the Trustee, the
     Trustee may with respect to the Debentures conclusively rely, as to the
     truth of the statements and the correctness of the opinions expressed
     therein, upon any certificates or opinions furnished to the Trustee and
     conforming to the requirements of this Indenture; but in the case of any
     such certificates or opinions that by any provision hereof are specifically
     required to be furnished to the Trustee, the Trustee shall be under a duty
     to examine the same to determine whether or not they conform to the
     requirements of this Indenture;

     (2) the Trustee shall not be liable for any error of judgment made in good
  faith by a Responsible Officer or Responsible Officers of the Trustee, unless
  it shall be proved that the Trustee was negligent in ascertaining the
  pertinent facts;

     (3) the Trustee shall not be liable with respect to any action taken or
  omitted to be taken by it in good faith in accordance with the direction of
  the holders of not less than a majority in principal amount of the Debentures
  at the time Outstanding relating to the time, method and place of conducting
  any proceeding for any remedy available to the Trustee, or exercising any
  trust or power conferred upon the Trustee under this Indenture with respect to
  the Debentures; and

     (4) none of the provisions contained in this Indenture shall require the
  Trustee to expend or risk its own funds or otherwise incur personal financial
  liability in the performance of any of its duties or in the exercise of any of
  its rights or powers, if there is reasonable ground for believing that the
  repayment of such funds or liability is not reasonably assured to it under the
  terms of this Indenture or adequate indemnity against such risk is not
  reasonably assured to it.

SECTION 9.2. NOTICE OF DEFAULTS

  Within 90 days after actual knowledge by a Responsible Officer of the Trustee
of the occurrence of any default hereunder with respect to the Debentures, the
Trustee shall transmit by mail to all holders of the Debentures, as their names
and addresses appear in the Debenture Register, notice of such default, unless
such default shall have been cured or waived; provided, however, that, except in
the case of a default in the payment of the principal or interest (including any
Additional Interest) on any Debenture, the Trustee shall be protected in
withholding such notice if and so long as the board of directors, the executive
committee or a trust committee of the directors and/or Responsible Officers of
the Trustee determines in good faith that the withholding of such notice is in
the interests of the holders of such Debentures; and provided, further, that in
the case of any default of the character specified in section 7.1(a)(iii), no
such notice to holders of Debentures need be sent until at least 30 days after
the occurrence thereof. For the purposes of this Section 9.2, the term "default"
means any event which is, or after notice or lapse of time or both, would
become, an Event of Default with respect to the Debentures.

SECTION 9.3. CERTAIN RIGHTS OF TRUSTEE

 Except as otherwise provided in Section 9.1:

  (a) The Trustee may rely and shall be protected in acting or refraining from
acting upon any resolution, certificate, statement, instrument, opinion, report,
notice, request, consent, order, approval, bond, security or other paper or
document believed by it to be genuine and to have been signed or presented by
the proper party or parties;

  (b) Any request, direction, order or demand of the Company mentioned herein
shall be sufficiently evidenced by a Board Resolution or an instrument signed in
the name of the Company by the President or any Vice President and

                                     -24-

 
by the Secretary or an Assistant Secretary or the Treasurer or an Assistant
Treasurer thereof (unless other evidence in respect thereof is specifically
prescribed herein);

  (c) The Trustee shall not be deemed to have knowledge of a default or an Event
of Default, other than an Event of Default specified in Section 7.1(a)(i); or
(ii), unless and until it receives written notification of such Event of Default
from the Company or by holders of at least 25% of the aggregate principal amount
of the Debentures at the time Outstanding;

  (d) The Trustee may consult with counsel, and the written advice of such
counsel or any Opinion of Counsel shall be full and complete authorization and
protection in respect of any action taken or suffered or omitted hereunder in
good faith and in reliance thereon;

  (e) The Trustee shall be under no obligation to exercise any of the rights or
powers vested in it by this Indenture at the request, order or direction of any
of the Debentureholders, pursuant to the provisions of this Indenture, unless
such Debentureholders shall have offered to the Trustee reasonable security or
indemnity against the costs, expenses and liabilities that may be incurred
therein or thereby; nothing contained herein shall, however, relieve the Trustee
of the obligation, upon the occurrence of an Event of Default (that has not been
cured or waived) to exercise with respect to the Debentures such of the rights
and powers vested in it by this Indenture, and to use the same degree of care
and skill in their exercise, as a prudent man would exercise or use under the
circumstances in the conduct of his own affairs;

  (f) The Trustee shall not be liable for any action taken or omitted to be
taken by it in good faith and believed by it to be authorized or within the
discretion or rights or powers conferred upon it by this Indenture;

  (g) The Trustee shall not be bound to make any investigation into the facts or
matters stated in any resolution, certificate, statement, instrument, opinion,
report, notice, request, consent, order, approval, bond, security, or other
papers or documents, unless requested in writing so to do by the holders of not
less than a majority in principal amount of the Outstanding Debentures
(determined as provided in Section 10.4); provided, however, that if the payment
within a reasonable time to the Trustee of the costs, expenses or liabilities
likely to be incurred by it in the making of such investigation is, in the
opinion of the Trustee, not reasonably assured to the Trustee by the security
afforded to it by the terms of this Indenture, the Trustee may require
reasonable indemnity against such costs, expenses or liabilities as a condition
to so proceeding. The reasonable expense of every such examination shall be paid
by the Company or, if paid by the Trustee, shall be repaid by the Company upon
demand; and

  (h) The Trustee may execute any of the trusts or powers hereunder or perform
any duties hereunder either directly or by or through agents or attorneys, and
the Trustee shall not be responsible for any misconduct or negligence on the
part of any agent or attorney appointed with due care by it hereunder.

SECTION 9.4. TRUSTEE NOT RESPONSIBLE FOR RECITALS, ETC

  (a) The Recitals contained herein and in the Debentures shall be taken as the
statements of the Company, and the Trustee assumes no responsibility for the
correctness of the same.

  (b) The Trustee makes no representations as to the validity or sufficiency of
this Indenture or of the Debentures.

  (c) The Trustee shall not be accountable for the use or application by the
Company of any of the Debentures or of the proceeds of such Debentures, or for
the use or application of any moneys paid over by the Trustee in accordance with
any provision of this Indenture, or for the use or application of any moneys
received by any paying agent other than the Trustee.

                                     -25-

 
SECTION 9.5. MAY HOLD DEBENTURES

  The Trustee or any Paying Agent or Debenture Registrar for the Debentures, in
its individual or any other capacity, may become the owner or pledgee of
Debentures with the same rights it would have if it were not Trustee, Paying
Agent or Debenture Registrar.

SECTION 9.6. MONEYS HELD IN TRUST

  Subject to the provisions of Section 13.5, all moneys received by the Trustee
shall, until used or applied as herein provided, be held in trust for the
purposes for which they were received, but need not be segregated from other
funds except to the extent required by law. The Trustee shall be under no
liability for interest on any moneys received by it hereunder except such as it
may agree with the Company to pay thereon.

SECTION 9.7. COMPENSATION AND REIMBURSEMENT

  (a) The Company covenants and agrees to pay to the Trustee, and the Trustee
shall be entitled to, such reasonable compensation (which shall not be limited
by any provision of law in regard to the compensation of a trustee of an express
trust), as the Company and the Trustee may from time to time agree in writing,
for all services rendered by it in the execution of the trusts hereby created
and in the exercise and performance of any of the powers and duties hereunder of
the Trustee, and, except as otherwise expressly provided herein, the Company
shall pay or reimburse the Trustee upon its request for all reasonable expenses,
disbursements and advances incurred or made by the Trustee in accordance with
any of the provisions of this Indenture (including the reasonable compensation
and the expenses and disbursements of its counsel and of all Persons not
regularly in its employ) except any such expense, disbursement or advance as may
arise from its negligence or bad faith. The Company also covenants to indemnify
the Trustee (and its officers, agents, directors and employees) for, and to hold
it harmless against, any loss, liability or expense incurred without negligence
or bad faith on the part of the Trustee and arising out of or in connection with
the acceptance or administration of this trust, including the costs and expenses
of defending itself against any claim of liability in the premises.

  (b) The obligations of the Company under this Section 9.7 to compensate and
indemnify the Trustee and to pay or reimburse the Trustee for expenses,
disbursements and advances shall constitute additional indebtedness hereunder.

SECTION 9.8. RELIANCE ON OFFICERS' CERTIFICATE

  Except as otherwise provided in Section 9.1, whenever in the administration of
the provisions of this Indenture the Trustee shall deem it necessary or
desirable that a matter be proved or established prior to taking or suffering or
omitting to take any action hereunder, such matter (unless other evidence in
respect thereof be herein specifically prescribed) may, in the absence of
negligence or bad faith on the part of the Trustee, be deemed to be conclusively
proved and established by an Officers' Certificate delivered to the Trustee and
such certificate, in the absence of negligence or bad faith on the part of the
Trustee, shall be full warrant to the Trustee for any action taken, suffered or
omitted to be taken by it under the provisions of this Indenture upon the faith
thereof.

SECTION 9.9. DISQUALIFICATION; CONFLICTING INTERESTS

  If the Trustee has or shall acquire any "conflicting interest" within the
meaning of Section 310(b) of the Trust Indenture Act, the Trustee and the
Company shall in all respects comply with the provisions of Section 310(b) of
the Trust Indenture Act.

SECTION 9.10. CORPORATE TRUSTEE REQUIRED; ELIGIBILITY

  There shall at all times be a Trustee with respect to the Debentures issued
hereunder which shall at all times be a corporation organized and doing business
under the laws of the United States of America or any State or Territory

                                     -26-

 
thereof or of the District of Columbia, or a corporation or other Person
permitted to act as trustee by the Commission, authorized under such laws to
exercise corporate trust powers, having a combined capital and surplus of at
least $50,000,000, and subject to supervision or examination by federal, state,
territorial, or District of Columbia authority. If such corporation publishes
reports of condition at least annually, pursuant to law or to the requirements
of the aforesaid supervising or examining authority, then for the purposes of
this Section 9.10, the combined capital and surplus of such corporation shall be
deemed to be its combined capital and surplus as set forth in its most recent
report of condition so published. The Company may not, nor may any Person
directly or indirectly controlling, controlled by, or under common control with
the Company, serve as Trustee. In case at any time the Trustee shall cease to be
eligible in accordance with the provisions of this Section 9.10, the Trustee
shall resign immediately in the manner and with the effect specified in Section
9.11.

SECTION 9.11. RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR

  (a) The Trustee or any successor hereafter appointed, may at any time resign
by giving written notice thereof to the Company and by transmitting notice of
resignation by mail, first class postage prepaid, to the Debentureholders, as
their names and addresses appear upon the Debenture Register. Upon receiving
such notice of resignation, the Company shall promptly appoint a successor
trustee with respect to Debentures by written instrument, in duplicate, executed
by order of the Board of Directors, one copy of which instrument shall be
delivered to the resigning Trustee and one copy to the successor trustee. If no
successor trustee shall have been so appointed and have accepted appointment
within 30 days after the mailing of such notice of resignation, the resigning
Trustee may petition any court of competent jurisdiction for the appointment of
a successor trustee with respect to Debentures, or any Debentureholder who has
been a bona fide holder of a Debenture or Debentures for at least six months
may, subject to the provisions of Section 9.9, on behalf of himself and all
others similarly situated, petition any such court for the appointment of a
successor trustee. Such court may thereupon after such notice, if any, as it may
deem proper and prescribe, appoint a successor trustee.

  (b) In case at any time any one of the following shall occur:

      (i) the Trustee shall fail to comply with the provisions of Section 9.9
    after written request therefor by the Company or by any Debentureholder who
    has been a bona fide holder of a Debenture or Debentures for at least six
    months; or

      (ii) the Trustee shall cease to be eligible in accordance with the
    provisions of Section 9.10 and shall fail to resign after written request
    therefor by the Company or by any such Debentureholder; or

      (iii) the Trustee shall become incapable of acting, or shall be adjudged a
    bankrupt or insolvent, or commence a voluntary bankruptcy proceeding, or a
    receiver of the Trustee or of its property shall be appointed or consented
    to, or any public officer shall take charge or control of the Trustee or of
    its property or affairs for the purpose of rehabilitation, conservation or
    liquidation, then, in any such case, the Company may remove the Trustee with
    respect to all Debentures and appoint a successor trustee by written
    instrument, in duplicate, executed by order of the Board of Directors, one
    copy of which instrument shall be delivered to the Trustee so removed and
    one copy to the successor trustee, or, subject to the provisions of Section
    9.9, unless the Trustee's duty to resign is stayed as provided herein, any
    Debentureholder who has been a bona fide holder of a Debenture or Debentures
    for at least six months may, on behalf of that holder and all others
    similarly situated, petition any court of competent jurisdiction for the
    removal of the Trustee and the appointment of a successor trustee. Such
    court may thereupon after such notice, if any, as it may deem proper and
    prescribe, remove the Trustee and appoint a successor trustee.

  (c) The holders of a majority in aggregate principal amount of the Debentures
at the time Outstanding may at any time remove the Trustee by so notifying the
Trustee and the Company and may appoint a successor Trustee with the consent of
the Company.

                                     -27-

 
  (d) Any resignation or removal of the Trustee and appointment of a successor
trustee with respect to the Debentures pursuant to any of the provisions of this
Section 9.11 shall become effective upon acceptance of appointment by the
successor trustee as provided in Section 9.12.

  (e) Any successor trustee appointed pursuant to this Section 9.11 may be
appointed with respect to the Debentures, and at any time there shall be only
one Trustee with respect to the Debentures.

SECTION 9.12. ACCEPTANCE OF APPOINTMENT BY SUCCESSOR

  (a) In case of the appointment hereunder of a successor trustee with respect
to the Debentures, every successor trustee so appointed shall execute,
acknowledge and deliver to the Company and to the retiring Trustee an instrument
accepting such appointment, and thereupon the resignation or removal of the
retiring Trustee shall become effective and such successor trustee, without any
further act, deed or conveyance, shall become vested with all the rights,
powers, trusts and duties of the retiring Trustee; but, on the request of the
Company or the successor trustee, such retiring Trustee shall, upon payment of
its charges, execute and deliver an instrument transferring to such successor
trustee all the rights, powers, and trusts of the retiring Trustee and shall
duly assign, transfer and deliver to such successor trustee all property and
money held by such retiring Trustee hereunder.

  (b) Upon request of any successor trustee, the Company shall execute any and
all instruments for more fully and certainly vesting in and confirming to such
successor trustee all such rights, powers and trusts referred to in paragraph
(a) of this Section 9.12.

  (c) No successor trustee shall accept its appointment unless at the time of
such acceptance such successor trustee shall be qualified and eligible under
this Article IX.

  (d) Upon acceptance of appointment by a successor trustee as provided in this
Section 9.12, the Company shall transmit notice of the succession of such
trustee hereunder by mail, first class postage prepaid, to the Debentureholders,
as their names and addresses appear upon the Debenture Register. If the Company
fails to transmit such notice within ten days after acceptance of appointment by
the successor trustee, the successor trustee shall cause such notice to be
transmitted at the expense of the Company.

SECTION 9.13. MERGER, CONVERSION, CONSOLIDATION OR SUCCESSION TO BUSINESS

  Any corporation into which the Trustee may be merged or converted or with
which it may be consolidated, or any corporation resulting from any merger,
conversion or consolidation to which the Trustee shall be a party, or any
corporation succeeding to the corporate trust business of the Trustee, shall be
the successor of the Trustee hereunder, provided that such corporation shall be
qualified under the provisions of Section 9.9 and eligible under the provisions
of Section 9.10, without the execution or filing of any paper or any further act
on the part of any of the parties hereto, anything herein to the contrary
notwithstanding. In case any Debentures shall have been authenticated, but not
delivered, by the Trustee then in office, any successor by merger, conversion or
consolidation to such authenticating Trustee may adopt such authentication and
deliver the Debentures so authenticated with the same effect as if such
successor Trustee had itself authenticated such Debentures.

SECTION 9.14. PREFERENTIAL COLLECTION OF CLAIMS AGAINST THE COMPANY

  The Trustee shall comply with Section 311(a) of the Trust Indenture Act,
excluding any creditor relationship described in Section 311(b) of the Trust
Indenture Act. A Trustee who has resigned or been removed shall be subject to
Section 311(a) of the Trust Indenture Act to the extent included therein.

                                     -28-

 
                                   ARTICLE X

                        CONCERNING THE DEBENTUREHOLDERS

SECTION 10.1. EVIDENCE OF ACTION BY HOLDERS

  (a) Whenever in this Indenture it is provided that the holders of a majority
or specified percentage in aggregate principal amount of the Debentures may take
any action (including the making of any demand or request, the giving of any
notice, consent or waiver or the taking of any other action), the fact that at
the time of taking any such action the holders of such majority or specified
percentage have joined therein may be evidenced by any instrument or any number
of instruments of similar tenor executed by such holders of Debentures in Person
or by agent or proxy appointed in writing.

  (b) If the Company shall solicit from the Debentureholders any request,
demand, authorization, direction, notice, consent, waiver or other action, the
Company may, at its option, as evidenced by an Officers' Certificate, fix in
advance a record date for the determination of Debentureholders entitled to give
such request, demand, authorization, direction, notice, consent, waiver or other
action, but the Company shall have no obligation to do so. If such a record date
is fixed, such request, demand, authorization, direction, notice, consent,
waiver or other action may be given before or after the record date, but only
the Debentureholders of record at the close of business on the record date shall
be deemed to be Debentureholders for the purposes of determining whether
Debentureholders of the requisite proportion of Outstanding Debentures have
authorized or agreed or consented to such request, demand, authorization,
direction, notice, consent, waiver or other action, and for that purpose the
Outstanding Debentures shall be computed as of the record date; provided,
however, that no such authorization, agreement or consent by such
Debentureholders on the record date shall be deemed effective unless it shall
become effective pursuant to the provisions of this Indenture not later than six
months after the record date.

SECTION 10.2. PROOF OF EXECUTION BY DEBENTUREHOLDERS

  Subject to the provisions of Section 9.1, proof of the execution of any
instrument by a Debentureholder (such proof shall not require notarization) or
his agent or proxy and proof of the holding by any Person of any of the
Debentures shall be sufficient if made in the following manner:

  (a) The fact and date of the execution by any such Person of any instrument
may be proved in any reasonable manner acceptable to the Trustee.

  (b) The ownership of Debentures shall be proved by the Debenture Register of
such Debentures or by a certificate of the Debenture Registrar thereof.

  (c) The Trustee may require such additional proof of any matter referred to in
this Section 10.2 as it shall deem necessary.

SECTION 10.3. WHO MAY BE DEEMED OWNERS

  Prior to the due presentment for registration of transfer of any Debenture,
the Company, the Trustee, any Paying Agent, any Authenticating Agent and any
Debenture Registrar may deem and treat the Person in whose name such Debenture
shall be registered upon the books of the Company as the absolute owner of such
Debenture (whether or not such Debenture shall be overdue and notwithstanding
any notice of ownership or writing thereon made by anyone other than the
Debenture Registrar) for the purpose of receiving payment of or on account of
the principal of and interest on such Debenture (subject to Section 2.3) and for
all other purposes; and neither the Company nor the Trustee nor any Paying Agent
nor any Authenticating Agent nor any Debenture Registrar shall be affected by
any notice to the contrary.

                                     -29-

 
SECTION 10.4. CERTAIN DEBENTURES OWNED BY COMPANY DISREGARDED

  In determining whether the holders of the requisite aggregate principal amount
of Debentures have concurred in any direction, consent or waiver under this
Indenture, the Debentures that are owned by the Company or any other obligor on
the Debentures or by any Person directly or indirectly controlling or controlled
by or under common control with the Company or any other obligor on the
Debentures shall be disregarded and deemed not to be Outstanding for the purpose
of any such determination, except that for the purpose of determining whether
the Trustee shall be protected in relying on any such direction, consent or
waiver, only Debentures that the Trustee actually knows are so owned shall be so
disregarded. The Debentures so owned that have been pledged in good faith may be
regarded as Outstanding for the purposes of this Section 10.4, if the pledgee
shall establish to the satisfaction of the Trustee the pledgee's right so to act
with respect to such Debentures and that the pledgee is not a Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with the Company or any such other obligor. In case of a dispute as to
such right, any decision by the Trustee taken upon the advice of counsel shall
be full protection to the Trustee.

SECTION 10.5. ACTIONS BINDING ON FUTURE DEBENTUREHOLDERS

  At any time prior to (but not after) the evidencing to the Trustee, as
provided in Section 10.1, of the taking of any action by the holders of the
majority or percentage in aggregate principal amount of the Debentures specified
in this Indenture in connection with such action, any holder of a Debenture that
is shown by the evidence to be included in the Debentures the holders of which
have consented to such action may, by filing written notice with the Trustee,
and upon proof of holding as provided in Section 10.2, revoke such action so far
as concerns such Debenture. Except as aforesaid any such action taken by the
holder of any Debenture shall be conclusive and binding upon such holder and
upon all future holders and owners of such Debenture, and of any Debenture
issued in exchange therefor, on registration of transfer thereof or in place
thereof, irrespective of whether or not any notation in regard thereto is made
upon such Debenture. Any action taken by the holders of the majority or
percentage in aggregate principal amount of the Debentures specified in this
Indenture in connection with such action shall be conclusively binding upon the
Company, the Trustee and the holders of all the Debentures.

                                  ARTICLE XI

                            SUPPLEMENTAL INDENTURES

SECTION 11.1. SUPPLEMENTAL INDENTURES WITHOUT THE CONSENT OF DEBENTUREHOLDERS

  In addition to any supplemental indenture otherwise authorized by this
Indenture, the Company and the Trustee may from time to time and at any time
enter into an indenture or indentures supplemental hereto (which shall conform
to the provisions of the Trust Indenture Act as then in effect), without the
consent of the Debentureholders, for one or more of the following purposes:

  (a) to cure any ambiguity, defect, or inconsistency herein, or in the
Debentures;

  (b) to comply with Article X;

  (c) to provide for uncertificated Debentures in addition to or in place of
certificated Debentures;

  (d) to add to the covenants of the Company for the benefit of the holders of
all or any of the Debentures or to surrender any right or power herein conferred
upon the Company;

  (e) to add to, delete from, or revise the conditions, limitations, and
restrictions on the authorized amount, terms, or purposes of issue,
authentication, and delivery of Debentures, as herein set forth;

  (f) to make any change that does not adversely affect the rights of any
Debentureholder in any material respect;

                                     -30-

 
  (g) to provide for the issuance of and establish the form and terms and
conditions of the Debentures, to establish the form of any certifications
required to be furnished pursuant to the terms of this Indenture or of the
Debentures, or to add to the rights of the holders of the Debentures;

  (h) to qualify or maintain the qualification of this Indenture under the Trust
Indenture Act; or

  (i) to evidence a consolidation or merger involving the Company as permitted
under Section 12.1.

  The Trustee is hereby authorized to join with the Company in the execution of
any such supplemental indenture, and to make any further appropriate agreements
and stipulations that may be therein contained, but the Trustee shall not be
obligated to enter into any such supplemental indenture that affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise.
Any supplemental indenture authorized by the provisions of this Section 11.1 may
be executed by the Company and the Trustee without the consent of the holders of
any of the Debentures at the time Outstanding, notwithstanding any of the
provisions of Section 11.2.

SECTION 11.2. SUPPLEMENTAL INDENTURES WITH CONSENT OF DEBENTUREHOLDERS

  With the consent (evidenced as provided in Section 10.1) of the holders of not
less than a majority in aggregate principal amount of the Debentures at the time
Outstanding, the Company, when authorized by Board Resolutions, and the Trustee
may from time to time and at any time enter into an indenture or indentures
supplemental hereto (which shall conform to the provisions of the Trust
Indenture Act as then in effect), for the purpose of adding any provisions to or
changing in any manner or eliminating any of the provisions of this Indenture or
of any supplemental indenture or of modifying in any manner not covered by
Section 11.1, the rights of the holders of the Debentures under this Indenture;
provided, however, that no such supplemental indenture shall without the consent
of the holders of each Debenture then Outstanding and affected thereby, (i)
extend the fixed maturity of any Debentures, reduce the principal amount
thereof, or reduce the rate or extend the time of payment of interest thereon,
without the consent of the holder of each Debenture so affected; or (ii) reduce
the aforesaid percentage of Debentures, the holders of which are required to
consent to any such supplemental indenture; provided further, that if the
Debentures are held by the Trust or a trustee of the Trust, such supplemental
indenture shall not be effective until the holders of a majority in liquidation
preference of Trust Securities of the Trust shall have consented to such
supplemental indenture; provided further, that if the consent of the holder of
each Outstanding Debenture is required, such supplemental indenture shall not be
effective until each holder of the Trust Securities of the Trust shall have
consented to such supplemental indenture. It shall not be necessary for the
consent of the Debentureholders affected thereby under this Section 11.2 to
approve the particular form of any proposed supplemental indenture, but it shall
be sufficient if such consent shall approve the substance thereof.

SECTION 11.3. EFFECT OF SUPPLEMENTAL INDENTURES

  Upon the execution of any supplemental indenture pursuant to the provisions of
this Article XI, this Indenture shall be and be deemed to be modified and
amended in accordance therewith and the respective rights, limitations of
rights, obligations, duties and immunities under this Indenture of the Trustee,
the Company and the holders of Debentures shall thereafter be determined,
exercised and enforced hereunder subject in all respects to such modifications
and amendments, and all the terms and conditions of any such supplemental
indenture shall be and be deemed to be part of the terms and conditions of this
Indenture for any and all purposes.

SECTION 11.4. DEBENTURES AFFECTED BY SUPPLEMENTAL INDENTURES

  Debentures affected by a supplemental indenture, authenticated and delivered
after the execution of such supplemental indenture pursuant to the provisions of
this Article XI, may bear a notation in form approved by the Company, provided
such form meets the requirements of any exchange upon which the Debentures may
be listed, as to any matter provided for in such supplemental indenture. If the
Company shall so determine, new Debentures so modified as to conform, in the
opinion of the Board of Directors of the Company, to any modification of this

                                     -31-

 
Indenture contained in any such supplemental indenture may be prepared by the
Company, authenticated by the Trustee and delivered in exchange for the
Debentures then Outstanding.

SECTION 11.5. EXECUTION OF SUPPLEMENTAL INDENTURES

  (a) Upon the request of the Company, accompanied by its Board Resolutions
authorizing the execution of any such supplemental indenture, and upon the
filing with the Trustee of evidence of the consent of Debentureholders required
to consent thereto as aforesaid, the Trustee shall join with the Company in the
execution of such supplemental indenture unless such supplemental indenture
affects the Trustee's own rights, duties or immunities under this Indenture or
otherwise, in which case the Trustee may in its discretion, but shall not be
obligated, to enter into such supplemental indenture. The Trustee, subject to
the provisions of Sections 9.1, may receive an Opinion of Counsel as conclusive
evidence that any supplemental indenture executed pursuant to this Article XI is
authorized or permitted by, and conforms to, the terms of this Article XI and
that it is proper for the Trustee under the provisions of this Article XI to
join in the execution thereof.

  (b) Promptly after the execution by the Company and the Trustee of any
supplemental indenture pursuant to the provisions of this Section 11.5, the
Trustee shall transmit by mail, first class postage prepaid, a notice, setting
forth in general terms the substance of such supplemental indenture, to the
Debentureholders as their names and addresses appear upon the Debenture
Register. Any failure of the Trustee to mail such notice, or any defect therein,
shall not, however, in any way impair or affect the validity of any such
supplemental indenture.

                                  ARTICLE XII

                             SUCCESSOR CORPORATION

SECTION 12.1. COMPANY MAY CONSOLIDATE, ETC.

  Nothing contained in this Indenture or in any of the Debentures shall prevent
any consolidation or merger of the Company with or into any other corporation or
corporations (whether or not affiliated with the Company, as the case may be),
or successive consolidations or mergers in which the Company, as the case may
be, or its successor or successors shall be a party or parties, or shall prevent
any sale, conveyance, transfer or other disposition of the property of the
Company, as the case may be, or its successor or successors as an entirety, or
substantially as an entirety, to any other corporation (whether or not
affiliated with the Company, as the case may be, or its successor or successors)
authorized to acquire and operate the same; provided, however, that the Company
hereby covenants and agrees that, (i) upon any such consolidation, merger, sale,
conveyance, transfer or other disposition, the due and punctual payment, in the
case of the Company, of the principal of and interest on all of the Debentures,
according to their tenor and the due and punctual performance and observance of
all the covenants and conditions of this Indenture to be kept or performed by
the Company as the case may be, shall be expressly assumed, by supplemental
indenture (which shall conform to the provisions of the Trust Indenture Act, as
then in effect) satisfactory in form to the Trustee executed and delivered to
the Trustee by the entity formed by such consolidation, or into which the
Company, as the case may be, shall have been merged, or by the entity which
shall have acquired such property; (ii) in case the Company consolidates with or
merges into another Person or conveys or transfers its properties and assets
substantially then as an entirety to any Person, the successor Person is
organized under the laws of the United States or any state or the District of
Columbia; and (iii) immediately after giving effect thereto, an Event of
Default, and no event which, after notice or lapse of time or both, would become
an Event of Default, shall have occurred and be continuing.

SECTION 12.2. SUCCESSOR CORPORATION SUBSTITUTED

  (a) In case of any such consolidation, merger, sale, conveyance, transfer or
other disposition and upon the assumption by the successor corporation, by
supplemental indenture, executed and delivered to the Trustee and satisfactory
in form to the Trustee, of the due and punctual payment of the principal of and
interest on all of the Debentures Outstanding and the due and punctual
performance of all of the covenants and conditions of this

                                     -32-

 
Indenture to be performed by the Company such successor corporation shall
succeed to and be substituted for the Company, with the same effect as if it had
been named as the Company herein, and thereupon the predecessor corporation
shall be relieved of all obligations and covenants under this Indenture and the
Debentures.

  (b) In case of any such consolidation, merger, sale, conveyance, transfer or
other disposition such changes in phraseology and form (but not in substance)
may be made in the Debentures thereafter to be issued as may be appropriate.

  (c) Nothing contained in this Indenture or in any of the Debentures shall
prevent the Company from merging into itself or acquiring by purchase or
otherwise all or any part of the property of any other Person (whether or not
affiliated with the Company).

SECTION 12.3. EVIDENCE OF CONSOLIDATION, ETC. TO TRUSTEE

  The Trustee, subject to the provisions of Section 9.1, may receive an Opinion
of Counsel as conclusive evidence that any such consolidation, merger, sale,
conveyance, transfer or other disposition, and any such assumption, comply with
the provisions of this Article XII.

                                 ARTICLE XIII

                          SATISFACTION AND DISCHARGE

SECTION 13.1. SATISFACTION AND DISCHARGE OF INDENTURE

  If at any time: (a) the Company shall have delivered to the Trustee for
cancellation all Debentures theretofore authenticated (other than any Debentures
that shall have been destroyed, lost or stolen and that shall have been replaced
or paid as provided in Section 2.9) and Debentures for whose payment money or
Governmental Obligations have theretofore been deposited in trust or segregated
and held in trust by the Company (and thereupon repaid to the Company or
discharged from such trust, as provided in Section 13.5); or (b) all such
Debentures not theretofore delivered to the Trustee for cancellation shall have
become due and payable, or are by their terms to become due and payable within
one year or are to be called for redemption within one year under arrangements
satisfactory to the Trustee for the giving of notice of redemption, and the
Company shall deposit or cause to be deposited with the Trustee as trust funds
the entire amount in moneys or Governmental Obligations sufficient or a
combination thereof, sufficient in the opinion of a nationally recognized firm
of independent public accountants expressed in a written certification thereof
delivered to the Trustee, to pay at maturity or upon redemption all Debentures
not theretofore delivered to the Trustee for cancellation, including principal
and interest due or to become due to such date of maturity or date fixed for
redemption, as the case may be, and if the Company shall also pay or cause to be
paid all other sums payable hereunder by the Company; then this Indenture shall
thereupon cease to be of further effect except for the provisions of Sections
2.3, 2.7, 2.9, 5.1, 5.2, 5.3, 9.7 and 9.10, that shall survive until the date of
maturity or redemption date, as the case may be, and Sections 9.6 and 13.5, that
shall survive to such date and thereafter, and the Trustee, on demand of the
Company and at the cost and expense of the Company, shall execute proper
instruments acknowledging satisfaction of and discharging this Indenture.

SECTION 13.2. DISCHARGE OF OBLIGATIONS

  If at any time all Debentures not heretofore delivered to the Trustee for
cancellation or that have not become due and payable as described in Section
13.1 shall have been paid by the Company by depositing irrevocably with the
Trustee as trust funds, an amount of moneys or Governmental Obligations, or a
combination thereof, sufficient in the opinion of a nationally recognized
certified public accounting firm to pay at maturity or upon redemption all
Debentures not theretofore delivered to the Trustee for cancellation, including
principal and interest due or to become due to such date of maturity or date
fixed for redemption, as the case may be, and if the Company shall also pay or
cause to be paid all other sums payable hereunder by the Company, then after the
date such moneys or Governmental Obligations, as the case may be, are deposited


                                     -33-

 
with the Trustee, the obligations of the Company under this Indenture shall
cease to be of further effect except for the provisions of Sections 2.3, 2.7,
2.9, 5.1, 5.2, 5.3, 9.6, 9.10 and 13.5 hereof that shall survive until such
Debentures shall mature and be paid. Thereafter, Sections 9.6 and 13.5 shall
survive.

SECTION 13.3. DEPOSITED MONEYS TO BE HELD IN TRUST

  All monies or Governmental Obligations deposited with the Trustee pursuant to
Sections 13.1 or 13.2 shall be held in trust and shall be available for payment
as due, either directly or through any Paying Agent (including the Company
acting as its own Paying Agent), to the holders of the Debentures for the
payment or redemption of which such moneys or Governmental Obligations have been
deposited with the Trustee.

SECTION 13.4. PAYMENT OF MONIES HELD BY PAYING AGENTS

  In connection with the satisfaction and discharge of this Indenture, all
moneys or Governmental Obligations then held by any Paying Agent under the
provisions of this Indenture shall, upon demand of the Company, be paid to the
Trustee and thereupon such Paying Agent shall be released from all further
liability with respect to such moneys or Governmental Obligations.

SECTION 13.5. REPAYMENT TO COMPANY

  Any monies or Governmental Obligations deposited with any Paying Agent or the
Trustee, or then held by the Company in trust, for payment of principal of or
interest on the Debentures that are not applied but remain unclaimed by the
holders of such Debentures for at least two years after the date upon which the
principal of or interest on such Debentures shall have respectively become due
and payable, shall be repaid to the Company, as the case may be, on May 31 of
each year or (if then held by the Company) shall be discharged from such trust;
and thereupon the Paying Agent and the Trustee shall be released from all
further liability with respect to such moneys or Governmental Obligations, and
the holder of any of the Debentures entitled to receive such payment shall
thereafter, as an unsecured general creditor, look only to the Company for the
payment thereof.

                                  ARTICLE XIV

        IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS AND DIRECTORS

SECTION 14.1. NO RECOURSE

  No recourse under or upon any obligation, covenant or agreement of this
Indenture, or of the Debentures, or for any claim based thereon or otherwise in
respect thereof, shall be had against any incorporator, stockholder, officer or
director, past, present or future as such, of the Company or of any predecessor
or successor corporation, either directly or through the Company or any such
predecessor or successor corporation, whether by virtue of any constitution,
statute or rule of law, or by the enforcement of any assessment or penalty or
otherwise; it being expressly understood that this Indenture and the obligations
issued hereunder are solely corporate obligations, and that no such personal
liability whatever shall attach to, or is or shall be incurred by, the
incorporators, stockholders, officers or directors as such, of the Company or of
any predecessor or successor corporation, or any of them, because of the
creation of the indebtedness hereby authorized, or under or by reason of the
obligations, covenants or agreements contained in this Indenture or in any of
the Debentures or implied therefrom; and that any and all such personal
liability of every name and nature, either at common law or in equity or by
constitution or statute, of, and any and all such rights and claims against,
every such incorporator, stockholder, officer or director as such, because of
the creation of the indebtedness hereby authorized, or under or by reason of the
obligations, covenants or agreements contained in this Indenture or in any of
the Debentures or implied therefrom, are hereby expressly waived and released as
a condition of, and as a consideration for, the execution of this Indenture and
the issuance of such Debentures.

                                     -34-

 
                                  ARTICLE XV

                           MISCELLANEOUS PROVISIONS

SECTION 15.1. EFFECT ON SUCCESSORS AND ASSIGNS

  All the covenants, stipulations, promises and agreements in this Indenture
contained by or on behalf of the Company shall bind their respective successors
and assigns, whether so expressed or not.

SECTION 15.2. ACTIONS BY SUCCESSOR

  Any act or proceeding by any provision of this Indenture authorized or
required to be done or performed by any board, committee or officer of the
Company shall and may be done and performed with like force and effect by the
corresponding board, committee or officer of any corporation that shall at the
time be the lawful sole successor of the Company.

SECTION 15.3. SURRENDER OF COMPANY POWERS

  The Company by instrument in writing executed by appropriate authority of its
Board of Directors and delivered to the Trustee may surrender any of the powers
reserved to the Company, and thereupon such power so surrendered shall terminate
both as to the Company, as the case may be, and as to any successor corporation.

SECTION 15.4. NOTICES

  Except as otherwise expressly provided herein any notice or demand that by any
provision of this Indenture is required or permitted to be given or served by
the Trustee or by the holders of Debentures to or on the Company may be given or
served by being deposited first class postage prepaid in a post-office letterbox
addressed (until another address is filed in writing by the Company with the
Trustee), as follows: Southwest Bancorp, Inc., 608 South Main Street,
Stillwater, Oklahoma 74074, Attention: Kerby E. Crowell. Any notice, election,
request or demand by the Company or any Debentureholder to or upon the Trustee
shall be deemed to have been sufficiently given or made, for all purposes, if
given or made in writing at the Corporate Trust Office of the Trustee.

SECTION 15.5. GOVERNING LAW

  This Indenture and each Debenture shall be deemed to be a contract made under
the internal laws of the State of Oklahoma, and for all purposes shall be
construed in accordance with the laws of said State.

SECTION 15.6. TREATMENT OF DEBENTURES AS DEBT

  It is intended that the Debentures shall be treated as indebtedness and not as
equity for federal income tax purposes. The provisions of this Indenture shall
be interpreted to further this intention.

SECTION 15.7. COMPLIANCE CERTIFICATES AND OPINIONS

  (a) Upon any application or demand by the Company to the Trustee to take any
action under any of the provisions of this Indenture, the Company shall furnish
to the Trustee an Officers' Certificate stating that all conditions precedent
provided for in this Indenture relating to the proposed action have been
complied with and an Opinion of Counsel stating that in the opinion of such
counsel all such conditions precedent have been complied with, except that in
the case of any such application or demand as to which the furnishing of such
documents is specifically required by any provision of this Indenture relating
to such particular application or demand, no additional certificate or opinion
need be furnished.

                                     -35-

 
  (b) Each certificate or opinion of the Company provided for in this Indenture
and delivered to the Trustee with respect to compliance with a condition or
covenant in this Indenture shall include (i) a statement that the Person making
such certificate or opinion has read such covenant or condition; (ii) a brief
statement as to the nature and scope of the examination or investigation upon
which the statements or opinions contained in such certificate or opinion are
based; (iii) a statement that, in the opinion of such Person, he has made such
examination or investigation as, in the opinion of such Person, is necessary to
enable him to express an informed opinion as to whether or not such covenant or
condition has been complied with; and (iv) a statement as to whether or not, in
the opinion of such Person, such condition or covenant has been complied with.

SECTION 15.8. PAYMENTS ON BUSINESS DAYS

  In any case where the date of maturity of interest or principal of any
Debenture or the date of redemption of any Debenture shall not be a Business
Day, then payment of interest or principal may (subject to Section 2.5) be made
on the next succeeding Business Day with the same force and effect as if made on
the nominal date of maturity or redemption, and no interest shall accrue for the
period after such nominal date.

SECTION 15.9. CONFLICT WITH TRUST INDENTURE ACT

  If and to the extent that any provision of this Indenture limits, qualifies or
conflicts with the duties imposed by Sections 310 to 317, inclusive, of the
Trust Indenture Act, such imposed duties shall control.

SECTION 15.10. COUNTERPARTS

  This Indenture may be executed in any number of counterparts, each of which
shall be an original, but such counterparts shall together constitute but one
and the same instrument.

SECTION 15.11. SEPARABILITY

  In case any one or more of the provisions contained in this Indenture or in
the Debentures shall for any reason be held to be invalid, illegal or
unenforceable in any respect, such invalidity, illegality or unenforceability
shall not affect any other provisions of this Indenture or of the Debentures,
but this Indenture and the Debentures shall be construed as if such invalid or
illegal or unenforceable provision had never been contained herein or therein.

SECTION 15.12. ASSIGNMENT

  The Company shall have the right at all times to assign any of its respective
rights or obligations under this Indenture to a direct or indirect wholly owned
Subsidiary of the Company, provided that, in the event of any such assignment,
the Company shall remain liable for all such obligations. Subject to the
foregoing, this Indenture is binding upon and inures to the benefit of the
parties thereto and their respective successors and assigns. This Indenture may
not otherwise be assigned by the parties thereto.

SECTION 15.13. ACKNOWLEDGMENT OF RIGHTS; RIGHT OF SET-OFF

  (a) The Company acknowledges that, with respect to any Debentures held by the
Trust or a trustee of the Trust, if the Property Trustee fails to enforce its
rights under this Indenture as the holder of the Debentures held as the assets
of the Trust, any holder of Preferred Securities may institute legal proceedings
directly against the Company to enforce such Property Trustee's rights under
this Indenture without first instituting any legal proceedings against such
Property Trustee or any other person or entity. Notwithstanding the foregoing,
and notwithstanding the provisions of Section 7.4(a) hereof,if an Event of
Default has occurred and is continuing and such event is attributable to the
failure of the Company to pay interest or principal on the Debentures on the
date such interest or principal is otherwise payable (or in the case of
redemption, on the redemption date), the Company acknowledges that a holder of
Preferred Securities may directly institute a proceeding for enforcement of


                                     -36-

 
payment to such holder of the principal of or interest on the Debentures having
a principal amount equal to the aggregate liquidation amount of the Preferred
Securities of such holder on or after the respective due date specified in the
Debentures.

  (b) Notwithstanding anything to the contrary contained in this Indenture, the
Company shall have the right to set-off any payment it is otherwise required to
make hereunder in respect of any Trust Securities to the extent that the Company
has previously made, or is concurrently making, a payment to the holder of such
Trust Securities under the Guarantee or in connection with a proceeding for
enforcement of payment of the principal of or interest on the Debentures
directly brought by holders of any Trust Securities.

                                  ARTICLE XVI

                          SUBORDINATION OF DEBENTURES

SECTION 16.1. AGREEMENT TO SUBORDINATE

  The Company covenants and agrees, and each holder of Debentures issued
hereunder by such holder's acceptance thereof likewise covenants and agrees,
that all Debentures shall be issued subject to the provisions of this Article
XVI; and each holder of a Debenture, whether upon original issue or upon
transfer or assignment thereof, accepts and agrees to be bound by such
provisions. The payment by the Company of the principal of and interest on all
Debentures issued hereunder shall, to the extent and in the manner hereinafter
set forth, be subordinated and junior in right of payment to the prior payment
in full of all Senior Debt, Subordinated Debt and Additional Senior Obligations
(collectively, "Senior Indebtedness") to the extent provided herein, whether
outstanding at the date of this Indenture or thereafter incurred. No provision
of this Article XVI shall prevent the occurrence of any default or Event of
Default hereunder.

SECTION 16.2. DEFAULT ON SENIOR DEBT, SUBORDINATED DEBT OR ADDITIONAL SENIOR
OBLIGATIONS

  In the event and during the continuation of any default by the Company in the
payment of principal, premium, interest or any other payment due on any Senior
Indebtedness of the Company, or in the event that the maturity of any Senior
Indebtedness of the Company has been accelerated because of a default, then, in
either case, no payment shall be made by the Company with respect to the
principal (including redemption payments) of or interest on the Debentures. In
the event that, notwithstanding the foregoing, any payment shall be received by
the Trustee when such payment is prohibited by the preceding sentence of this
Section 16.2, such payment shall be held in trust for the benefit of, and shall
be paid over or delivered to, the holders of Senior Indebtedness or their
respective representatives, or to the trustee or trustees under any indenture
pursuant to which any of such Senior Indebtedness may have been issued, as their
respective interests may appear, but only to the extent that the holders of the
Senior Indebtedness (or their representative or representatives or a trustee)
notify the Trustee in writing within 90 days of such payment of the amounts then
due and owing on the Senior Indebtedness, and only the amounts specified in such
notice to the Trustee shall be paid to the holders of Senior Indebtedness.

SECTION 16.3. LIQUIDATION; DISSOLUTION; BANKRUPTCY

  (a) Upon any payment by the Company or distribution of assets of the Company
of any kind or character, whether in cash, property or securities, to creditors
upon any dissolution or winding-up or liquidation or reorganization of the
Company, whether voluntary or involuntary or in bankruptcy, insolvency,
receivership or other proceedings, all amounts due upon all Senior Indebtedness
of the Company shall first be paid in full, or payment thereof provided for in
money in accordance with its terms, before any payment or distribution is made
by the Company on account of the principal or interest on the Debentures; and
upon any such dissolution or winding-up or liquidation or reorganization, any
payment by the Company, or distribution of assets of the Company of any kind or
character, whether in cash, property or securities, to which the holders of the
Debentures or the Trustee would be entitled to receive from the Company, except
for the provisions of this Article XVI, shall be paid by the Company or by any
receiver, trustee in bankruptcy, liquidating trustee, agent or other Person


                                     -37-

 
making such payment or distribution, or by the holders of the Debentures or by
the Trustee under this Indenture if received by them or it, directly to the
holders of Senior Indebtedness of the Company (pro rata to such holders on the
basis of the respective amounts of Senior Indebtedness held by such holders, as
calculated by the Company) or their representative or representatives, or to the
trustee or trustees under any indenture pursuant to which any instruments
evidencing such Senior Indebtedness may have been issued, as their respective
interests may appear, to the extent necessary to pay such Senior Indebtedness in
full, in money or money's worth, after giving effect to any concurrent payment
or distribution to or for the holders of such Senior Indebtedness, before any
payment or distribution is made to the holders of Debentures or to the Trustee.

  (b) In the event that, notwithstanding the foregoing, any payment or
distribution of assets of the Company of any kind or character, whether in cash,
property or securities, prohibited by the foregoing, shall be received by the
Trustee before all Senior Indebtedness of the Company is paid in full, or
provision is made for such payment in money in accordance with its terms, such
payment or distribution shall be held in trust for the benefit of and shall be
paid over or delivered to the holders of such Senior Indebtedness or their
representative or representatives, or to the trustee or trustees under any
indenture pursuant to which any instruments evidencing such Senior Indebtedness
may have been issued, as their respective interests may appear, as calculated by
the Company, for application to the payment of all Senior Indebtedness of the
Company, as the case may be, remaining unpaid to the extent necessary to pay
such Senior Indebtedness in full in money or money's worth in accordance with
its terms, after giving effect to any concurrent payment or distribution to or
for the benefit of the holders of such Senior Indebtedness.

  (c) For purposes of this Article XVI, the words "cash, property or securities"
shall not be deemed to include shares of stock of the Company as reorganized or
readjusted, or securities of the Company or any other corporation provided for
by a plan of reorganization or readjustment, the payment of which is
subordinated, at least to the extent provided in this Article XVI with respect
to the Debentures, to the payment of all Senior Indebtedness of the Company, as
the case may be, that may at the time be outstanding, provided that (i) such
Senior Indebtedness is assumed by the new corporation, if any, resulting from
any such reorganization or readjustment; and (ii) the rights of the holders of
such Senior Indebtedness are not, without the consent of such holders, altered
by such reorganization or readjustment. The consolidation of the Company with,
or the merger of the Company into, another corporation, or the liquidation or
dissolution of the Company following the conveyance or transfer of its property
as an entirety, or substantially as an entirety, to another corporation upon the
terms and conditions provided for in Article XII shall not be deemed a
dissolution, winding-up, liquidation or reorganization for the purposes of this
Section 16.3 if such other corporation shall, as a part of such consolidation,
merger, conveyance or transfer, comply with the conditions stated in Article
XII. Nothing in Section 16.2 or in this Section 16.3 shall apply to claims of,
or payments to, the Trustee under or pursuant to Section 9.7.

SECTION 16.4. SUBROGATION

  (a) Subject to the payment in full of all Senior Indebtedness of the Company,
the rights of the holders of the Debentures shall be subrogated to the rights of
the holders of such Senior Indebtedness to receive payments or distributions of
cash, property or securities of the Company, as the case may be, applicable to
such Senior Indebtedness until the principal of and interest on the Debentures
shall be paid in full; and, for the purposes of such subrogation, no payments or
distributions to the holders of such Senior Indebtedness of any cash, property
or securities to which the holders of the Debentures or the Trustee would be
entitled except for the provisions of this Article XVI, and no payment pursuant
to the provisions of this Article XVI to or for the benefit of the holders of
such Senior Indebtedness by holders of the Debentures or the Trustee, shall, as
between the Company, its creditors other than holders of Senior Indebtedness of
the Company, and the holders of the Debentures, be deemed to be a payment by the
Company to or on account of such Senior Indebtedness. It is understood that the
provisions of this Article XVI are and are intended solely for the purposes of
defining the relative rights of the holders of the Debentures, on the one hand,
and the holders of such Senior Indebtedness on the other hand.

  (b) Nothing contained in this Article XVI or elsewhere in this Indenture or in
the Debentures is intended to or shall impair, as between the Company, its
creditors (other than the holders of Senior Indebtedness of the Company),

                                     -38-

 
and the holders of the Debentures, the obligation of the Company, which is
absolute and unconditional, to pay to the holders of the Debentures the
principal of and interest on the Debentures as and when the same shall become
due and payable in accordance with their terms, or is intended to or shall
affect the relative rights of the holders of the Debentures and creditors of the
Company, as the case may be, other than the holders of Senior Indebtedness of
the Company, as the case may be, nor shall anything herein or therein prevent
the Trustee or the holder of any Debenture from exercising all remedies
otherwise permitted by applicable law upon default under this Indenture, subject
to the rights, if any, under this Article XVI of the holders of such Senior
Indebtedness in respect of cash, property or securities of the Company, as the
case may be, received upon the exercise of any such remedy.

  (c) Upon any payment or distribution of assets of the Company referred to in
this Article XVI, the Trustee, subject to the provisions of Article IX, and the
holders of the Debentures shall be entitled to conclusively rely upon any order
or decree made by any court of competent jurisdiction in which such dissolution,
winding-up, liquidation or reorganization proceedings are pending, or a
certificate of the receiver, trustee in bankruptcy, liquidation trustee, agent
or other Person making such payment or distribution, delivered to the Trustee or
to the holders of the Debentures, for the purposes of ascertaining the Persons
entitled to participate in such distribution, the holders of Senior Indebtedness
and other indebtedness of the Company, as the case may be, the amount thereof or
payable thereon, the amount or amounts paid or distributed thereon and all other
facts pertinent thereto or to this Article XVI.

SECTION 16.5. TRUSTEE TO EFFECTUATE SUBORDINATION

  Each holder of Debentures by such holder's acceptance thereof authorizes and
directs the Trustee on such holder's behalf to take such action as may be
necessary or appropriate to effectuate the subordination provided in this
Article XVI and appoints the Trustee such holder's attorney-in-fact for any and
all such purposes.

SECTION 16.6. NOTICE BY THE COMPANY

  (a) The Company shall give prompt written notice to a Responsible Officer of
the Trustee of any fact known to the Company that would prohibit the making of
any payment of monies to or by the Trustee in respect of the Debentures pursuant
to the provisions of this Article XVI. Notwithstanding the provisions of this
Article XVI or any other provision of this Indenture, the Trustee shall not be
charged with knowledge of the existence of any facts that would prohibit the
making of any payment of monies to or by the Trustee in respect of the
Debentures pursuant to the provisions of this Article XVI, unless and until a
Responsible Officer of the Trustee shall have received written notice thereof
from the Company or a holder or holders of Senior Indebtedness or from any
trustee therefor; and before the receipt of any such written notice, the
Trustee, subject to the provisions of Section 9.1, shall be entitled in all
respects to assume that no such facts exist; provided, however, that if the
Trustee shall not have received the notice provided for in this Section 16.6 at
least two Business Days prior to the date upon which by the terms hereof any
money may become payable for any purpose (including, without limitation, the
payment of the principal of or interest on any Debenture), then, anything herein
contained to the contrary notwithstanding, the Trustee shall have full power and
authority to receive such money and to apply the same to the purposes for which
they were received, and shall not be affected by any notice to the contrary that
may be received by it within two Business Days prior to such date.

  (b) The Trustee, subject to the provisions of Section 9.1, shall be entitled
to conclusively rely on the delivery to it of a written notice by a Person
representing himself to be a holder of Senior Indebtedness of the Company (or a
trustee on behalf of such holder) to establish that such notice has been given
by a holder of such Senior Indebtedness or a trustee on behalf of any such
holder or holders. In the event that the Trustee determines in good faith that
further evidence is required with respect to the right of any Person as a holder
of such Senior Indebtedness to participate in any payment or distribution
pursuant to this Article XVI, the Trustee may request such Person to furnish
evidence to the reasonable satisfaction of the Trustee as to the amount of such
Senior Indebtedness held by such Person, the extent to which such Person is
entitled to participate in such payment or distribution and any other facts
pertinent to the rights of such Person under this Article XVI, and, if such

                                     -39-

 
evidence is not furnished, the Trustee may defer any payment to such Person
pending judicial determination as to the right of such Person to receive such
payment.

SECTION 16.7. RIGHTS OF THE TRUSTEE; HOLDERS OF SENIOR INDEBTEDNESS

  (a) The Trustee in its individual capacity shall be entitled to all the rights
set forth in this Article XVI in respect of any Senior Indebtedness at any time
held by it, to the same extent as any other holder of Senior Indebtedness, and
nothing in this Indenture shall deprive the Trustee of any of its rights as such
holder. The Trustee's right to compensation and reimbursement of expenses as set
forth in Section 9.7 shall not be subject to the subordination provisions of the
Article XVI.

  (b) With respect to the holders of Senior Indebtedness of the Company, the
Trustee undertakes to perform or to observe only such of its covenants and
obligations as are specifically set forth in this Article XVI, and no implied
covenants or obligations with respect to the holders of such Senior Indebtedness
shall be read into this Indenture against the Trustee. The Trustee shall not be
deemed to owe any fiduciary duty to the holders of such Senior Indebtedness and,
subject to the provisions of Section 9.1, the Trustee shall not be liable to any
holder of such Senior Indebtedness if it shall pay over or deliver to holders of
Debentures, the Company or any other Person money or assets to which any holder
of such Senior Indebtedness shall be entitled by virtue of this Article XVI or
otherwise.

SECTION 16.8. SUBORDINATION MAY NOT BE IMPAIRED

  (a) No right of any present or future holder of any Senior Indebtedness of the
Company to enforce subordination as herein provided shall at any time in any way
be prejudiced or impaired by any act or failure to act on the part of the
Company or by any act or failure to act, in good faith, by any such holder, or
by any noncompliance by the Company with the terms, provisions and covenants of
this Indenture, regardless of any knowledge thereof that any such holder may
have or otherwise be charged with.

                                     -40-

 
  (b) Without in any way limiting the generality of Section 16.8(a), the holders
of Senior Indebtedness of the Company may, at any time and from time to time,
without the consent of or notice to the Trustee or the holders of the
Debentures, without incurring responsibility to the holders of the Debentures
and without impairing or releasing the subordination provided in this Article
XVI or the obligations hereunder of the holders of the Debentures to the holders
of such Senior Indebtedness, do any one or more of the following: (i) change the
manner, place or terms of payment or extend the time of payment of, or renew or
alter, such Senior Indebtedness, or otherwise amend or supplement in any manner
such Senior Indebtedness or any instrument evidencing the same or any agreement
under which such Senior Indebtedness is outstanding; (ii) sell, exchange,
release or otherwise deal with any property pledged, mortgaged or otherwise
securing such Senior Indebtedness; (iii) release any Person liable in any manner
for the collection of such Senior Indebtedness; and (iv) exercise or refrain
from exercising any rights against the Company and any other Person.

  IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly
executed, and their respective corporate seals to be hereunto affixed and
attested, all as of the day and year first above written.

                              SOUTHWEST BANCORP, INC.

                              By: /s/Robert L. McCormick, Jr.
                                  --------------------------------------- 
                                  Robert L. McCormick, Jr., President

Attest:

/s/ Deborah T. Bradley
- -----------------------------
Deborah T. Bradley, Secretary

                              STATE STREET BANK AND TRUST COMPANY, as trustee

                              By: /s/ Paul D. Allen
                                  -----------------------------
                                  Paul D. Allen, Vice President

Attest:

/s/ [Attested]
- -----------------------------

                                     -41-

 
STATE OF OKLAHOMA   )
                    ) ss
COUNTY OF PAYNE     )

  On this 4th day of June 1997, before me appeared Robert L. McCormick, Jr., to
me personally known, who, being by me duly sworn, did say that he is the
President of Southwest Bancorp, Inc. and that the seal affixed to said
instrument is the corporate seal of said corporation, and that said instrument
was signed and sealed in behalf of said corporation by authority of its board of
directors and said Robert L. McCormick, Jr. acknowledged said instrument to be
the free act and deed of said corporation.

  In testimony whereof I have hereunto set my hand and affixed my official seal
at my office in said county and state the day and year last above written.

                              [Notarized]
                              ---------------------------------
                              Notary Public
 
                              My term expires: 
                                              -----------------
[seal]

COMMONWEALTH OF MASSACHUSETTS )
                              ) ss
COUNTY OF SUFFOLK             )

  On this 4th day of June 1997, before me appeared Paul D. Allen, to me
personally known, who, being by me duly sworn, did say that he is the Vice
President of STATE STREET BANK AND TRUST, and that the seal affixed to said
instrument is the corporate seal of said corporation, and that said instrument
was signed and sealed in behalf of said corporation by authority of its board of
directors and said Paul D. Allen acknowledged said instrument to be the free act
and deed of said corporation.

  In testimony whereof I have hereunto set my hand and affixed my official seal
at my office in said county and commonwealth the day and year last above
written.

                              [Notarized]
                              ---------------------------------
                              Notary Public
 
                              My term expires: 
                                               ---------------- 
[seal]

                                     -42-