EXHIBIT 10.3

                             THE TRANSFER OF THIS AGREEMENT IS
                          SUBJECT TO CERTAIN PROVISIONS CONTAINED
                       HEREIN AND TO RESALE RESTRICTIONS UNDER THE
                         SECURITIES ACT OF 1933, AS AMENDED, AND
                             APPLICABLE STATE SECURITIES LAWS


                                  STOCK OPTION AGREEMENT


     This Stock Option Agreement, dated as of June 25, 1996 (the 
"Agreement"), is made by and between Mid-Peninsula Bancorp, a California 
corporation ("Issuer"), and Cupertino National Bancorp, a California 
corporation ("Grantee").

     WHEREAS, Grantee and Issuer have entered into an Agreement and Plan of 
Reorganization and Merger dated June 5, 1996 (the "Reorganization 
Agreement"), providing for, among other things, the merger of Grantee with 
and into Issuer (the "Merger"), with Issuer concurrently changing its name to 
Greater Bay Bancorp and being the surviving corporation; and

     WHEREAS, as a condition and inducement to Grantee's execution of the 
Reorganization Agreement, and in consideration of the grant of the option 
granted pursuant to the Stock Option Agreement, dated the date hereof, 
between Issuer as grantee and Grantee as issuer (the "Reciprocal Option"), 
Issuer has agreed to grant to Grantee the Option (as defined below).

     NOW, THEREFORE, in consideration of the foregoing and the respective 
representations, warranties, covenants and agreements set forth herein and in 
the Reorganization Agreement, and intending to be legally bound hereby, 
Issuer and Grantee agree as follows:

     1.   DEFINED TERMS.  Capitalized terms which are used but not defined 
herein shall have the meanings ascribed to such terms in the Reorganization 
Agreement.  As used in this Agreement, the following terms shall have the 
meanings indicated:

          (a)  "Exchange Act" means the Securities Exchange Act of 1934, as 
amended.

          (b)  "Federal Reserve Board" means the Board of Governors of the 
Federal Reserve System.

          (c)  "Holder" means Grantee and, to the extent Grantee has assigned 
its rights and obligations under this Agreement as permitted herein, any 
subsidiary of Grantee, but only to the extent such entity is the holder of 
rights afforded by this Agreement at the time such rights are exercised or 
otherwise asserted.

                                              Page 30 of 69 Pages



          (d)  "Person" shall have the meaning specified in Sections 3(a)(9) 
and 13(d)(3) of the Exchange Act and the rules and regulations thereunder.

          (e)  "Securities Act" means the Securities Act of 1933, as amended.

     2.   GRANT OF OPTION.  Subject to the terms and conditions set forth 
herein, Issuer hereby grants to Grantee an irrevocable option (the "Option") 
to purchase up to 307,504 shares (the "Option Shares") of Common Stock, no 
par value ("Issuer Common Stock"), of Issuer at a purchase price per Option 
Share of Twenty and 45/100ths Dollars ($20.45) (the "Purchase Price").  The 
Purchase Price and the number of Option Shares that may be received upon the 
exercise of the Option are subject to adjustment as set forth below.

     3.   EXERCISE OF OPTION.

          (a)  The Holder may exercise the Option, in whole or in part, at 
any time and from time to time following the occurrence of a Purchase Event 
(as defined below); PROVIDED THAT the Option shall terminate and be of no 
further force and effect upon the earliest to occur of:

               (i)   the Effective Time of the Merger; or

               (ii)  12 months after the first occurrence of a Purchase Event; 
or

               (iii) 18 months after the termination of the 
Reorganization Agreement on or following the occurrence of a Preliminary 
Purchase Event (as defined below); or

               (iv)  termination of the Reorganization Agreement in accordance 
with the terms thereof prior to the occurrence of a Purchase Event or a 
Preliminary Purchase Event; or

               (v)   the date on which the Reciprocal Option shall have become 
exercisable, in whole or in part, in accordance with its terms.

Notwithstanding anything to the contrary contained herein, (A) the Option may 
not be exercised at any time when Grantee shall be in breach of any of its 
covenants or agreements contained in the Reorganization Agreement such that 
Issuer shall be entitled (without regard to any grace period provided 
therein) to terminate the Reorganization Agreement pursuant to Section 
12b(vii) thereof, whether or not Issuer shall have so terminated the 
Reorganization Agreement; (B) this Agreement and the Option shall terminate 
automatically upon the termination of the Reorganization Agreement by Issuer 
pursuant to Section 12b(vii) thereof; and (C) any purchase of shares upon 
exercise of the Option shall be subject to compliance with applicable law, 
including, without limitation, the Bank Holding Company Act of 1956, as 
amended.  

                                       2

                                              Page 31 of 69 Pages




          (b)  As used herein, a "Purchase Event" means any of the following  
    events:

               (i)   The Board of Directors of Issuer shall have approved, or 
recommended to the Issuer's shareholders that they approve, a proposal 
received by Issuer from a person (other than Grantee or any subsidiary of 
Grantee) to effect an Acquisition Transaction (as defined below), Tender 
Offer (as defined below) or Exchange Offer (as defined below); or 

               (ii)  Issuer, without having received Grantee's prior written 
consent, shall have entered into an agreement with any person (other than 
Grantee or any subsidiary of Grantee) to effect an Acquisition Transaction; or

               (iii) any person (other than Grantee or any subsidiary of 
Grantee) shall have acquired beneficial ownership (as such term is defined in 
Rule 13d-3 promulgated under the Exchange Act) of or the right to acquire 
beneficial ownership of, or any "group" (as such term is defined under the 
Exchange Act and the rules and regulations promulgated thereunder) shall have 
been formed which beneficially owns or has the right to acquire beneficial 
ownership of fifteen percent (15%) or more of the then outstanding shares of 
Issuer Common Stock.

As used herein, the term "Acquisition Transaction" shall mean (A) a merger, 
consolidation or similar transaction involving Issuer or any of its 
subsidiaries (other than internal mergers, reorganizations, consolidations or 
dissolutions involving only Issuer and/or existing subsidiaries and other 
than a merger, consolidation or similar transaction in which the common 
shareholders of Issuer immediately prior thereto in the aggregate own at 
least seventy-five percent (75%) of the common stock of the surviving or 
successor corporation immediately after the consummation thereof), (B) the 
disposition, by sale, lease, exchange or otherwise, of fifteen (15%) or more 
of the consolidated assets or deposit liabilities of Issuer and its 
subsidiaries, or (C) a purchase or other acquisition (including by way of 
merger, consolidation, share exchange or any similar transaction), other than 
by Issuer or its subsidiaries, of securities representing fifteen percent 
(15%) or more of the voting power of Issuer or any of its subsidiaries.

          (c)  As used herein, a "Preliminary Purchase Event" means any of 
the following events:

               (i)   any person (other than Grantee or any subsidiary of 
Grantee) shall have acquired beneficial ownership of, or the right to acquire 
beneficial ownership of, or any "group" (as defined under the Exchange Act 
and the rules and regulations thereunder) shall have been formed which 
beneficially owns or has the right to acquire beneficial ownership of, ten 
percent (10%) or more of the then outstanding shares of Issuer Common Stock; 
or

                                       3

                                              Page 32 of 69 Pages



               (ii)  any person (other than Grantee or any subsidiary of 
Grantee) shall have commenced (as such term is defined in Rule 14d-2 under 
the Exchange Act), or shall have filed a registration statement under the 
Securities Act with respect to, a tender offer or exchange offer to purchase 
any shares of Issuer Common Stock such that, upon consummation of such offer, 
such person would own or control ten percent (10%) or more of the then 
outstanding shares of Issuer Common Stock (such an offer being referred to 
herein as a "Tender Offer" or an "Exchange Offer", respectively); or

               (iii) Issuer, without having received Grantee's prior 
written consent, shall have entered into an agreement with any person (other 
than Grantee or any subsidiary of Grantee) with respect to, or the Board of 
Directors of Issuer shall have recommended that the shareholders of Issuer 
approve or accept, a purchase or other acquisition (including by way of 
merger, consolidation, share exchange or any similar transaction), other than 
by Issuer or its subsidiaries, representing ten percent (10%) or more of the 
voting power of Issuer or any of its subsidiaries; or

               (iv) any person (other than Grantee or any subsidiary of 
Grantee) shall have filed an application or notice with the Federal Reserve 
Board or other federal or state regulatory authority, which application or 
notice has been accepted for processing, for approval to engage in an 
Acquisition Transaction; or

               (v)  the holders of Issuer Common Stock shall not have 
approved the Reorganization Agreement at the meeting of such shareholders 
held for the purpose of voting on the Reorganization Agreement, such meeting 
shall not have been held or shall have been canceled prior to termination of 
the Reorganization Agreement, or Issuer's Board of Directors shall have 
withdrawn or modified in a manner adverse to Grantee the recommendation of 
Issuer's Board of Directors with respect to the Reorganization Agreement, in 
each case after it shall have been publicly announced that any person (other 
than Grantee or any subsidiary of Grantee) shall have (A) made or disclosed 
an intention to make a proposal to engage in an Acquisition Transaction or 
(B) commenced a Tender Offer or filed a registration statement under the 
Securities Act with respect to an Exchange Offer.

          (d)  Issuer shall notify Grantee promptly in writing of the 
occurrence of any Purchase Event or Preliminary Purchase Event; PROVIDED, 
HOWEVER, such notice shall not be a condition to the right of the Holder to 
exercise the Option.

          (e)  In the event Holder wishes to exercise the Option, it shall 
send to Issuer a written notice (dated the date on which it is sent to 
Issuer, which date is referred to as the "Notice Date") specifying (i) the 
total number of Option Shares it intends to purchase pursuant to such 
exercise and (ii) a date not earlier than three (3) business days nor later 
than fifteen (15) business days from the Notice Date for the closing (the 
"Closing") of such purchase (the "Closing Date").  The Closing shall be held 
at the Issuer's principal office or at such other place as Issuer and Holder 
may agree.  If prior notification to or approval of the Federal Reserve Board 
or any other regulatory authority is required as a condition precedent

                                        4

                                              Page 33 of 69 Pages



to such purchase, then (A) Holder shall promptly file and process the 
required notice or application for approval; (B) Issuer shall cooperate with 
Holder in the filing of the required notice or application for approval and 
the obtaining of any such approval; and (C) the Closing Date shall be subject 
to extension for such period of time, not to exceed six (6) months, as may be 
necessary to permit the Holder to submit such filing to, and, if necessary, 
to obtain such approval from, the Federal Reserve Board or other applicable 
regulatory authority; PROVIDED, HOWEVER, that the notice of Option exercise 
and such governmental filing must be made, and the Notice Date must be, no 
later than the date on which the Option would otherwise terminate.  Any 
exercise of the Option shall be deemed to have occurred on the Notice Date.

     4.   PAYMENT AND DELIVERY OF CERTIFICATES.

          (a)  On each Closing Date, Holder shall (i) pay to Issuer, in 
immediately available funds by wire transfer to a bank account designated by 
Issuer, an amount equal to the Purchase Price multiplied by the number of 
Option Shares to be purchased on such Closing Date and (ii) present and 
surrender this Agreement to the Issuer at the address of the Issuer specified 
in Section 11(g) hereof.

          (b)  At each Closing, simultaneously with the delivery of 
immediately available funds and surrender of this Agreement as provided in 
Section 4(a), (i) Issuer shall deliver to Holder (A) a certificate or 
certificates representing the Option Shares to be purchased at such Closing, 
which Option Shares shall be free and clear of all liens, claims, charges and 
encumbrances of any kind whatsoever, and (B) if the Option is exercised in 
part only, an executed new agreement with the same terms as this Agreement 
evidencing the right to purchase the balance of the shares of Issuer Common 
Stock purchasable hereunder; and (ii) Holder shall deliver to Issuer a letter 
agreeing that Holder shall not offer to sell or otherwise dispose of such 
Option Shares in violation of the provisions of this Agreement or applicable 
state and federal securities laws.

          (c)  Certificates for the Option Shares delivered at each Closing 
shall be endorsed with a restrictive legend which shall read substantially as 
follows:

     THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
     UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT") OR QUALIFIED
     OR REGISTERED UNDER THE SECURITIES LAWS OF ANY STATE.  THEY MAY NOT BE
     SOLD OR TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION
     STATEMENT UNDER THE ACT AND UNTIL THEY HAVE BEEN QUALIFIED OR
     REGISTERED UNDER APPLICABLE STATE SECURITIES LAWS, UNLESS THE ISSUER
     RECEIVES AN OPINION OF COUNSEL FOR THE HOLDER OF THESE SECURITIES,
     REASONABLY SATISFACTORY TO THE ISSUER, STATING THAT SUCH SALE OR
     TRANSFER IS EXEMPT FROM THE REGISTRATION AND PROSPECTUS DELIVERY
     REQUIREMENTS OF THE ACT AND ANY APPLICABLE STATE SECURITIES LAWS.  THE
     TRANSFER OF THE

                                       5

                                              Page 34 of 69 Pages



     SECURITIES REPRESENTED BY THIS CERTIFICATE IS ALSO
     SUBJECT TO RESALE RESTRICTIONS ARISING UNDER THE TERMS OF A STOCK
     OPTION AGREEMENT DATED AS OF JUNE 5, 1996, A COPY OF WHICH IS
     AVAILABLE FOR INSPECTION AT THE OFFICE OF THE SECRETARY OF THE ISSUER.

It is understood and agreed that the above legend shall be removed by 
delivery of substitute certificate(s) without such legend if Holder shall 
have delivered to Issuer a copy of a letter from the staff of the SEC, or an 
opinion of counsel in form and substance reasonably satisfactory to Issuer 
and its counsel, to the effect that such legend is not required for purposes 
of the Securities Act or applicable state securities laws.

     5.   REPRESENTATIONS AND WARRANTIES OF ISSUER.  Issuer hereby represents 
and warrants to Grantee as follows:

          (a)  DUE AUTHORIZATION.  Issuer has all requisite corporate power 
and authority to enter into this Agreement and, subject to any approvals 
referred to herein, to consummate the transactions contemplated hereby.  The 
execution and delivery of this Agreement and the consummation of the 
transactions contemplated hereby have been duly authorized by all necessary 
corporate action on the part of Issuer.  This Agreement has been duly 
executed and delivered by Issuer.

          (b)  AUTHORIZED STOCK.  Issuer has taken all necessary corporate 
action to authorize and reserve and to permit it to issue, and, at all times 
from the date hereof until the obligation to deliver Issuer Common Stock upon 
the exercise of the Option terminates, will have reserved for issuance, upon 
exercise of the Option, shares of Issuer Common Stock necessary for Holder to 
exercise the Option, and Issuer will take all necessary corporate action to 
authorize and reserve for issuance all additional shares of Issuer Common 
Stock or other securities which may be issued pursuant to Section 7 upon 
exercise of the Option.  The shares of Issuer Common Stock to be issued upon 
due exercise of the Option, including all additional shares of Issuer Common 
Stock or other securities which may be issuable pursuant to Section 7, upon 
issuance pursuant hereto, shall be duly and validly issued, fully paid and 
nonassessable, and shall be delivered free and clear of all liens, claims, 
charges and encumbrances of any kind or nature whatsoever, including any 
preemptive rights of any stockholder of Issuer.

     6.   REPRESENTATIONS AND WARRANTIES OF GRANTEE.  Grantee hereby 
represents and warrants to Issuer that:

          (a)  DUE AUTHORIZATION.  Grantee has all requisite corporate power 
and authority to enter into this Agreement and, subject to any approvals or 
consents referred to herein, to consummate the transactions contemplated 
hereby.  The execution and delivery of this Agreement and the consummation of 
the transactions contemplated hereby have been duly

                                       6

                                              Page 35 of 69 Pages



authorized by all necessary corporate action on the part of Grantee.  This 
Agreement has been duly executed and delivered by Grantee.

          (b)  PURCHASE NOT FOR DISTRIBUTION.  This Option is not being, and 
any Option Shares or other securities acquired by Grantee upon exercise of 
the Option will not be, acquired with a view to the public distribution 
thereof and will not be transferred or otherwise disposed of except in a 
transaction registered or exempt from registration under the Securities Act 
and applicable state securities laws.

     7.   ADJUSTMENT UPON CHANGES IN CAPITALIZATION, ETC.

          (a)  In the event of any change in Issuer Common Stock by reason of 
a stock dividend, stock split, split-up, recapitalization, combination, 
exchange of shares or similar transaction, the type and number of shares or 
securities subject to the Option, and the Purchase Price therefor, shall be 
adjusted appropriately, and proper provision shall be made in the 
documentation pertaining to such transaction so that Holder shall receive, 
upon exercise of the Option, the number and class of shares or other 
securities or property that Holder would have received in respect of Issuer 
Common Stock if the Option had been exercised immediately prior to such 
event, or the record date therefor, as applicable.  If any additional shares 
of Issuer Common Stock are issued after the date of this Agreement (whether 
upon exercise of stock options or otherwise but excluding any issuance 
pursuant to an event described in the first sentence of this Section 7(a)), 
the number of shares of Issuer Common Stock subject to the Option shall be 
adjusted so that, after such issuance, such number of shares, together with 
any shares of Issuer Common Stock previously issued pursuant hereto, equals 
nineteen percent (19%) of the number of shares of Issuer Common Stock then 
issued and outstanding, without giving effect to any shares subject to or 
issued pursuant to the Option (with any fractional share being rounded up to 
the next full share).  Issuer agrees that in no event shall the number of 
shares of Issuer Common Stock issued after the date of this Agreement 
pursuant to the preceding sentence, together with the number of shares of 
Issuer Common Stock subject to the Option, adjusted as aforesaid, exceed the 
number of available authorized but unissued and unreserved shares of Issuer 
Common Stock.

          (b)  In the event that Issuer shall, prior to the occurrence of an 
event set forth in Section 3(a) terminating the Holder's right to exercise 
the Option, enter into an agreement (i) to consolidate with or merge into any 
person, other than Grantee or one of its subsidiaries, and shall not be the 
continuing or surviving corporation of such consolidation or merger, (ii) to 
permit any person, other than Grantee or one of its subsidiaries, to merge 
into Issuer and Issuer shall be the continuing or surviving corporation, but, 
in connection with such merger, the then outstanding shares of Issuer Common 
Stock shall be changed into or exchanged for stock or other securities of 
Issuer or any other person or cash or any other property or the outstanding 
shares of Issuer Common Stock immediately prior to such merger shall after 
such merger represent less than fifty percent (50%) of the outstanding shares 
and share equivalents of the merged company, or (iii) to sell or otherwise 
transfer all or substantially all of its consolidated assets or deposit 
liabilities to any person other than

                                       7

                                              Page 36 of 69 Pages



Grantee or one of its subsidiaries, then, and in each such case, the 
agreement governing such transaction shall make proper provisions so that the 
Option shall, upon the consummation of any such transaction and upon the 
terms and conditions set forth herein, be converted into, or exchanged for, 
an option (the "Substitute Option"), at the election of Grantee, of either 
(A) the Acquiring Corporation (as defined below), or (B) any person that 
controls the Acquiring Corporation, (such person being referred to as the 
"Substitute Option Issuer").

          (c)  The Substitute Option shall have the same terms as the Option, 
PROVIDED THAT if the terms of the Substitute Option cannot, for legal 
reasons, be the same as the Option, such terms shall be as similar as 
possible and in no event less advantageous to Grantee.  The Substitute Option 
Issuer shall also enter into an agreement with the then holder or holders of 
the Substitute Option in substantially the same form as this Agreement (after 
giving effect for such purposes to the provisions of this Agreement), which 
shall be applicable to the Substitute Option.

          (d)  The Substitute Option shall be exercisable for such number of 
shares of the Substitute Common Stock (as is hereinafter defined) as is equal 
to the Assigned Value (as is hereinafter defined) multiplied by the number of 
shares of the Issuer Common Stock for which the Option was theretofore 
exercisable, divided by the Average Price (as is hereinafter defined).  The 
exercise price of the Substitute Option per share of the Substitute Common 
Stock (the "Substitute Purchase Price") shall then be equal to the Purchase 
Price multiplied by a fraction in which the numerator is the number of shares 
of the Issuer Common Stock for which the Option was theretofore exercisable 
and the denominator is the number of shares of the Substitute Common Stock 
for which the Substitute Option is exercisable.

          (e)  As used herein, the following terms have the meanings 
indicated:

               (i)   "Acquiring Corporation" shall mean (A) the continuing or 
surviving corporation of a consolidation or merger with Issuer (if other than 
Issuer), (B) Issuer in a merger in which Issuer is the continuing or 
surviving person, and (C) the transferee of all or any substantial part of 
the Issuer's assets (or the assets of its subsidiaries).

               (ii)  "Substitute Common Stock" shall mean the common stock 
issued by the Substitute Option Issuer upon exercise of the Substitute Option.

               (iii) "Assigned Value" shall mean the highest of (A) the price 
per share of the Issuer Common Stock at which a Tender Offer or Exchange 
Offer therefor has been made by any person (other than Grantee or a 
subsidiary of Grantee), (B) the price per share of the Issuer Common Stock to 
be paid by any person (other than Grantee or a subsidiary of Grantee) 
pursuant to an agreement with Issuer, and (C) the highest bid price per share 
of Issuer Common Stock as quoted by the brokerage firms acting as market 
makers for Issuer's Common Stock prior to the listing of Issuer's Common 
Stock on the NASDAQ National Market System and thereafter, on the NASDAQ 
Stock Market or other principal trading market or securities exchange on 
which such shares are traded as reported by a

                                       8

                                              Page 37 of 69 Pages



recognized source within the six-month period immediately preceding the 
effective date of the agreement governing the transaction described in 
Section 7(b) which gave rise to the Substitute Option; PROVIDED, HOWEVER, 
that in the event of a sale of less than all of Issuer's consolidated assets 
or deposit liabilities, the Assigned Value shall be the sum of the price paid 
in such sale for such assets or deposit liabilities and the current market 
value of the remaining consolidated net assets of Issuer as determined by a 
nationally recognized investment banking firm selected by the Holder (or by a 
majority in interest of the Holders if there shall be more than one Holder (a 
"Holder Majority")) and reasonably acceptable to Issuer, divided by the 
number of shares of the Issuer Common Stock outstanding at the time of such 
sale.  In the event that an exchange offer is made for the Issuer Common 
Stock or an agreement is entered into for a merger or consolidation involving 
consideration other than cash, the value of the securities or other property 
issuable or deliverable in exchange for the Issuer Common Stock shall be 
determined by a nationally recognized investment banking firm by Holder (or a 
Holder Majority) and reasonably acceptable to Issuer.

               (iv) "Average Price" shall mean the average closing price 
determined as described above prior to and following the listing of Issuer's 
common stock on the NASDAQ National Market System of a share of the 
Substitute Common Stock for the one year immediately preceding the effective 
date of the consolidation, merger or sale in question, but in no event higher 
than the closing price of the shares of the Substitute Common Stock on the 
day preceding such consolidation, merger or sale; PROVIDED THAT if Issuer is 
the issuer of the Substitute Option, the Average Price shall be computed with 
respect to a share of common stock issued by Issuer, the person merging into 
Issuer or by any company which controls or is controlled by such merging 
person, as Holder may elect.

          (f)  In no event, pursuant to any of the foregoing paragraphs, 
shall the Substitute Option be exercisable for more than nineteen percent 
(19%) of the aggregate of the shares of the Substitute Common Stock 
outstanding prior to exercise of the Substitute Option (with any fractional 
share being rounded up to the next full share).

          (g)  Issuer shall not enter into any transaction described in 
subsection (b) of this Section 7 unless the Acquiring Corporation and any 
person that controls the Acquiring Corporation assume in writing all the 
obligations of Issuer hereunder and take all other actions that may be 
necessary so that the provisions of this Section 7 are given full force and 
effect (including, without limitation, any action that may be necessary so 
that the shares of Substitute Common Stock are in no way distinguishable from 
or have lesser economic value than other shares of common stock issued by the 
Substitute Option Issuer).

          (h)  At the written request of Holder delivered to the Substitute 
Option Issuer prior to the occurrence of an event set forth in Section 3(a) 
above terminating the Substitute Option, the Substitute Option Issuer shall 
repurchase from Holder (i) the Substitute Option and/or (ii) all Substitute 
Common Stock theretofore purchased by Holder pursuant hereto with respect to 
which Holder then has beneficial ownership.  The date on which Holder 
exercises its rights under this Section 7(h) is referred to as the 
"Substitute Option Request

                                       9

                                              Page 38 of 69 Pages



Date."  Such repurchase shall be at an aggregate price (the "Substitute 
Option Repurchase Consideration") equal to the sum of (A) the excess, if any, 
of (1) the Highest Closing Price (as defined below) for each share of 
Substitute Common Stock over (2) the Substitute Purchase Price per share of 
Substitute Common Stock, multiplied by the number of shares of Substitute 
Common Stock for which the Substitute Option may then be exercised and as to 
which Holder has exercised its repurchase right hereunder, plus (B) the 
Highest Closing Price for each share of Substitute Common Stock multiplied by 
the number of shares of Substitute Common Stock acquired by Holder upon 
exercise of the Option or Substitute Option and as to which Holder has 
exercised its repurchase right hereunder.  The term "Highest Closing Price" 
shall mean the highest bid price per share of Substitute Common Stock as 
quoted by the brokerage firms acting as market makers for the Substitute 
Common Stock prior to the listing of the Substitute Common Stock on any 
national securities exchange and thereafter as reported by the principal 
trading market or securities exchange on which such shares are traded, during 
the sixty (60) business days preceding the Substitute Option Request Date.

          (i)  The provisions of Sections 8(b), 8(c), 9 and 10 shall apply, 
with appropriate adjustments, to any securities for which the Option becomes 
exercisable pursuant to this Section 7 and as applicable, references in such 
sections to "Issuer", "Option", "Purchase Price", "Issuer Common Stock", 
"Repurchase Consideration", and "Request Date" shall be deemed to be 
references to "Substitute Option Issuer", "Substitute Option", "Substitute 
Purchase Price", "Substitute Common Stock", "Substitute Option Repurchase 
Consideration", and "Substitute Option Request Date", respectively.

     8.   REPURCHASE AT THE OPTION OF GRANTEE.

          (a)  At any time after the first occurrence of a Repurchase Event 
(as defined in Section 8(e) below), at the written request of Holder 
delivered to Issuer prior to the occurrence of an event set forth in Section 
3(a) above terminating the Option, Issuer shall repurchase from Holder (i) 
the Option and (ii) all Option Shares theretofore purchased by Holder 
pursuant hereto with respect to which Holder then has beneficial ownership.  
The date on which Holder exercises its rights under this Section 8 is 
referred to as the "Request Date." Such repurchase shall be at an aggregate 
price (the "Repurchase Consideration") equal to the sum of:

               (i)   the aggregate Purchase Price paid by Holder for any 
Option Shares acquired pursuant to the Option with respect to which Holder 
then has beneficial ownership;

               (ii)  the excess, if any, of (A) the Applicable Price (as 
defined below) for each Option Share over (B) the Purchase Price per Option 
Share (subject to adjustment pursuant to Section 7(a)), multiplied by the 
number of Option Shares with respect to which the Option has not been 
exercised; and

                                              Page 39 of 69 Pages

                                       10



               (iii) the excess, if any, of the Applicable Price over the 
Purchase Price (subject to adjustment pursuant to Section 7(a)) paid (or, in 
the case of Option Shares with respect to which the Option has been exercised 
but the Closing Date has not occurred, payable) by Holder for each Option 
Share with respect to which the Option has been exercised and with respect to 
which Holder then has beneficial ownership, multiplied by the number of such 
shares.

          (b)  If Holder exercises its rights under this Section 8, Issuer 
shall, within ten (10) business days after the Request Date, pay the 
Repurchase Consideration to Holder in immediately available funds, and Holder 
shall surrender to Issuer the Option and the certificates evidencing the 
Option Shares purchased thereunder with respect to which Holder then has 
beneficial ownership and has designated to be repurchased, and Holder shall 
warrant that it has sole record and beneficial ownership of such shares and 
that the same are then free and clear of all liens, claims, charges and 
encumbrances of any kind whatsoever. 

          (c)  Notwithstanding the provisions hereof to the contrary, to the 
extent that Issuer is prohibited under applicable law, regulation or 
administrative policy from repurchasing all or any portion of the Option or 
Option Shares, then (i) Issuer shall promptly give notice of such fact to 
Holder; (ii) Issuer shall, from time to time subject to the last sentence of 
this Section 8(c), deliver to Holder that portion of the Repurchase 
Consideration that it is not then so prohibited from paying; (iii) at 
Holder's request, Issuer shall promptly file any required notice or 
application for approval and expeditiously process the same.  After Holder's 
receipt of such notice from Issuer, Issuer shall not be in breach of its 
repurchase obligation hereunder to the extent it is or remains, despite 
reasonable efforts to obtain any required approvals, legally prohibited from 
repurchasing the Option or Option Shares.  Holder shall have the right (A) to 
revoke its request for repurchase with respect to the portion of the Option 
or Option Shares that Issuer is prohibited from repurchasing, (B) to require 
Issuer to deliver to Holder the Option and/or Option Shares Issuer is 
prohibited from repurchasing, and (C) to exercise the Option as to the number 
of Option Shares for which the Option was exercisable at the Request Date 
less the number of such Option Shares in respect of which the Repurchase 
Consideration has been lawfully paid. Notwithstanding anything herein to the 
contrary, Issuer shall not be obligated to repurchase all or any part of the 
Option or Option Shares pursuant to more than one written request from 
Holder, except that Issuer shall be obligated to repurchase, pursuant to more 
than one written request, any Option or Option Shares in the event that 
Holder (1) has revoked its request for repurchase in accordance with the 
provisions of this Section 8 prior to the occurrence of an event set forth in 
Section 3(a) terminating the Holder's right to exercise the Option and (2) 
has delivered, prior to such event, a new written notice requesting a 
repurchase.  If an event set forth in Section 3(a) terminating the Holder's 
right to exercise the Option occurs prior to, or is scheduled to occur 
within, sixty (60) days after the date of the notice by Issuer described in 
clause 8(c)(i) above, then, notwithstanding the occurrence of such 
terminating event, Holder shall have the right to receive the Repurchase 
Consideration to the extent Issuer is or becomes, within a sixty (60) day 
period from the date of such notice by Issuer, legally permitted to 
repurchase.  Except as set forth in the preceding sentence, Holder's 
repurchase rights under this Agreement shall

                                       11

                                              Page 40 of 69 Pages



terminate concurrently with the termination of Holder's right to exercise the 
Option, pursuant to Section 3(a).

          (d)  For purposes of this Agreement, the "Applicable Price" means 
the highest of (i) the highest price per share of Issuer Common Stock paid 
for any such share by the person or groups described in Section 8(e)(i), (ii) 
the price per share of Issuer Common Stock received by holders of Issuer 
Common Stock in connection with any merger or other business combination 
transaction described in Section 7(b)(i), 7(b)(ii) or 7(b)(iii), or (iii) the 
highest bid price per share of Issuer Common Stock as quoted by the brokerage 
firms acting as market makers for Issuer's Common Stock prior to the listing 
of Issuer's Common Stock on the NASDAQ National Market System and thereafter 
on the NASDAQ Stock Market or other principal trading market or securities 
exchange on which such shares are traded as reported by a recognized source 
during the sixty (60) business days preceding the Request Date; PROVIDED, 
HOWEVER, that in the event of a sale of less than all of Issuer's assets, the 
Applicable Price shall be the sum of the price paid in such sale for such 
assets or deposit liabilities and the current market value of the remaining 
consolidated net assets of Issuer as determined by a nationally recognized 
investment banking firm selected by Holder (or the Holder Majority) and 
reasonably acceptable to Issuer, divided by the number of shares of the 
Issuer Common Stock outstanding at the time of such sale.  If the 
consideration to be offered, paid or received pursuant to either of the 
foregoing clauses (i) or (ii) shall be other than in cash, the value of such 
consideration shall be determined in good faith by an independent nationally 
recognized investment banking firm selected by Holder (or the Holder 
Majority) and reasonably acceptable to Issuer, which determination shall be 
conclusive for all purposes of this Agreement.

          (e)  As used herein, a "Repurchase Event" shall occur if (i) any 
person (other than Grantee or any subsidiary of Grantee) shall have acquired 
beneficial ownership of (as such term is defined in Rule 13d-3 promulgated 
under the Exchange Act) or the right to acquire beneficial ownership of, or 
any "group" (as such term is defined under the Exchange Act and the rules and 
regulations promulgated thereunder) shall have been formed which beneficially 
owns, or has the right to acquire beneficial ownership of, fifty percent 
(50%) or more of the then outstanding shares of Issuer Common Stock or (ii) 
any of the transactions described in Section 7(b)(i), 7(b)(ii) or 7(b)(iii) 
shall be consummated.

     9.   LISTING.  If Issuer Common Stock or any other securities to be 
acquired upon exercise of the Option are not then authorized for quotation on 
the NASDAQ Stock Market National Market System or any securities exchange, 
Issuer, upon the request of Holder, will promptly file an application to 
authorize for quotation the shares of Issuer Common Stock or other securities 
to be acquired upon exercise of the Option on the NASDAQ Stock Market 
National Market System and will use its best efforts to obtain approval of 
such listing as soon as practicable.

     10.  DIVISION OF OPTION.  This Agreement (and the Option granted hereby) 
are exchangeable, without expense, at the option of Holder, upon presentation 
and surrender of

                                       12

                                              Page 41 of 69 Pages



this Agreement at the principal office of Issuer for other agreements 
providing for other options of different denominations entitling the holder 
thereof to purchase in the aggregate the same number of shares of Issuer 
Common Stock purchasable hereunder.  The terms "other agreements" and "other 
options" as used in the preceding sentence mean any other agreements and 
related options for which this Agreement (and the Option granted hereby) may 
be exchanged.  Upon receipt by Issuer of evidence reasonably satisfactory to 
it of the loss, theft, destruction or mutilation of this Agreement, and (in 
the case of loss, theft or destruction) of reasonably satisfactory 
indemnification, and upon surrender and cancellation of this Agreement, if 
mutilated, Issuer will execute and deliver a new Agreement of like tenor and 
date.  Any such new Agreement executed and delivered shall constitute an 
additional contractual obligation on the part of Issuer, whether or not the 
Agreement so lost, stolen, destroyed or mutilated shall at any time be 
enforceable by anyone.

     11.  MISCELLANEOUS.

          (a)  EXPENSES.  Except as otherwise provided in Section 9, each of 
the parties hereto and any Holder shall bear and pay all costs and expenses 
incurred by it or on its behalf in connection with the transactions 
contemplated hereunder, including, without limitation, fees and expenses of 
its own financial consultants, investment bankers, accountants and counsel.

          (b)  WAIVER AND AMENDMENT.  Any provision of this Agreement may be 
waived at any time by the party that is entitled to the benefits of such 
provision.  This Agreement may not be modified, amended, altered or 
supplemented except upon the execution and delivery of a written agreement 
executed by the parties hereto.

          (c)  ENTIRE AGREEMENT; NO THIRD-PARTY BENEFICIARY.  This Agreement, 
together with the Reorganization Agreement and the other documents and 
instruments referred to herein and therein (i) constitutes the entire 
agreement and supersedes all prior agreements and understandings, both 
written and oral, between the parties with respect to the subject matter 
hereof and (ii) is not intended to confer upon any person other than the 
parties hereto any rights or remedies hereunder.  

          (d)  SEVERABILITY.  If any term, provision, covenant or restriction 
of this Agreement is held by a court or a federal or state regulatory 
authority of competent jurisdiction to be invalid, void or unenforceable, 
such invalid, void or unenforceable term, provision, covenant or restriction 
shall, if it is so susceptible, be deemed modified to the minimum extent 
necessary to render the same valid and enforceable and, in all events, the 
remainder of the terms, provisions, covenants and restrictions of this 
Agreement shall remain in full force and effect and shall in no way be 
affected, impaired or invalidated. Without limiting the foregoing, if for any 
reason such court or regulatory authority determines that Holder may not 
legally acquire, or Issuer may not legally repurchase, the full number of 
shares of Issuer Common Stock as provided in Sections 3 and 8 (as adjusted 
pursuant to Section 7), it is the express intention of Issuer to allow Holder 
to acquire or to require Issuer

                                       13

                                              Page 42 of 69 Pages



to repurchase the maximum number of shares as may be legally permissible 
without any amendment or modification hereof.

          (e)  GOVERNING LAW.  This Agreement shall be governed and construed 
in accordance with the laws of the State of California without regard to any 
applicable conflicts of law rules.

          (f)  DESCRIPTIVE HEADINGS.  The descriptive headings contained 
herein are for convenience of reference only and shall not affect in any way 
the meaning or interpretation of this Agreement.

          (g)  NOTICES.  All notices, requests, claims, demands and other 
communications under this Agreement shall be in writing and shall be given 
(and shall be deemed to have been duly received if so given) by personal 
delivery, by telecopy (PROVIDED THAT copy is concurrently sent by first class 
U.S. mail, postage prepaid), or by mail (registered or certified mail, 
postage prepaid, return receipt requested) to the parties as follows:

          If to Issuer:       Cupertino National Bancorp
                              20230 Stevens Creek Boulevard
                              Cupertino, CA  95014
                              Attn:  C. Donald Allen, President
                              Fax No.:  408-996-2465

          If to Grantee:      Mid-Peninsula Bancorp
                              420 Cowper Street
                              Palo Alto, CA  94301-1504
                              Attn:  David L. Kalkbrenner, President
                              Fax No.:  415-323-7421

or to such other address as a party may have furnished to the others in 
writing in accordance with this paragraph, except that notices of change of 
address shall only be effective upon receipt.  Any notice, demand or other 
communication given pursuant to the provisions of this Section 11(g) shall be 
deemed to have been given on the date actually delivered or on the third day 
following the date mailed, whichever first occurs.

          (h)  COUNTERPARTS.  This Agreement and any amendments hereto may be 
executed in two counterparts, each of which shall be considered one and the 
same agreement and shall become effective when both counterparts have been 
signed, it being understood that both parties need not sign the same 
counterpart.

          (i)  ASSIGNMENT.  Neither this Agreement nor any of the rights, 
interests or obligations hereunder or under the Option shall be assigned by 
any of the parties hereto without the prior written consent of the other 
party, except that Grantee may assign this Agreement to a wholly-owned 
subsidiary of Grantee upon compliance with applicable laws.

                                       14

                                              Page 43 of 69 Pages



Subject to the preceding sentence, this Agreement shall be binding upon, 
inure to the benefit of, and be enforceable by the parties and their 
respective successors and permitted assigns.

          (j)  FURTHER ASSURANCES.  In the event of any exercise of the Option
by Holder, Issuer and Holder shall execute and deliver all other documents and
instruments and take all other action that may be reasonably necessary in order
to consummate the transactions provided for by such exercise.

          (k)  SPECIFIC PERFORMANCE.  The parties hereto agree that this
Agreement may be enforced by either party through specific performance,
injunctive relief and other equitable relief.  Both parties further agree to
waive any requirement for the securing or posting of any bond in connection with
the obtaining of any such equitable relief and that this provision is without
prejudice to any other rights that the parties hereto may have for any failure
to perform this Agreement.


     IN WITNESS WHEREOF, Issuer and Grantee have caused this Stock Option
Agreement to be signed by their respective officers thereunto duly authorized,
all as of the day and year first written above.


CUPERTINO NATIONAL BANCORP         MID-PENINSULA BANCORP


By--------------------             By------------------------------- 
     C. Donald Allen                     David L. Kalkbrenner
     President                           President


                                       15

                                              Page 44 of 69 Pages




                                  THE TRANSFER OF THIS AGREEMENT IS
                               SUBJECT TO CERTAIN PROVISIONS CONTAINED
                              HEREIN AND TO RESALE RESTRICTIONS UNDER THE
                               SECURITIES ACT OF 1933, AS AMENDED, AND
                                 APPLICABLE STATE SECURITIES LAWS


                                     STOCK OPTION AGREEMENT


     This Stock Option Agreement, dated as of June 25, 1996 (the 
"Agreement"), is made by and between Cupertino National Bancorp, a California 
corporation ("Issuer"), and Mid-Peninsula Bancorp, a California corporation 
("Grantee").

     WHEREAS, Grantee and Issuer have entered into an Agreement and Plan of 
Reorganization and Merger dated June 5, 1996 (the "Reorganization 
Agreement"), providing for, among other things, the merger of Issuer with and 
into Grantee (the "Merger"), with Grantee concurrently changing its name to 
Greater Bay Bancorp and being the surviving corporation; and

     WHEREAS, as a condition and inducement to Grantee's execution of the 
Reorganization Agreement, and in consideration of the grant of the option 
granted pursuant to the Stock Option Agreement, dated the date hereof, 
between Issuer as grantee and Grantee as issuer (the "Reciprocal Option"), 
Issuer has agreed to grant to Grantee the Option (as defined below).

     NOW, THEREFORE, in consideration of the foregoing and the respective 
representations, warranties, covenants and agreements set forth herein and in 
the Reorganization Agreement, and intending to be legally bound hereby, 
Issuer and Grantee agree as follows:

     1.   DEFINED TERMS.  Capitalized terms which are used but not defined 
herein shall have the meanings ascribed to such terms in the Reorganization 
Agreement.  As used in this Agreement, the following terms shall have the 
meanings indicated:

          (a)  "Exchange Act" means the Securities Exchange Act of 1934, as 
amended.

          (b)  "Federal Reserve Board" means the Board of Governors of the 
Federal Reserve System.

          (c)  "Holder" means Grantee and, to the extent Grantee has assigned 
its rights and obligations under this Agreement as permitted herein, any 
subsidiary of Grantee, but only to the extent such entity is the holder of 
rights afforded by this Agreement at the time such rights are exercised or 
otherwise asserted.

                                              Page 45 of 69 Pages




          (d)  "Person" shall have the meaning specified in Sections 3(a)(9) 
and 13(d)(3) of the Exchange Act and the rules and regulations thereunder.

          (e)  "Securities Act" means the Securities Act of 1933, as amended.

     2.   GRANT OF OPTION.  Subject to the terms and conditions set forth 
herein, Issuer hereby grants to Grantee an irrevocable option (the "Option") 
to purchase up to 361,065 shares (the "Option Shares") of Common Stock, no 
par value ("Issuer Common Stock"), of Issuer at a purchase price per Option 
Share of Fourteen and 80/100 Dollars ($14.80) (the "Purchase Price").  The 
Purchase Price and the number of Option Shares that may be received upon the 
exercise of the Option are subject to adjustment as set forth below.

     3.   EXERCISE OF OPTION.

          (a)  The Holder may exercise the Option, in whole or in part, at 
any time and from time to time following the occurrence of a Purchase Event 
(as defined below); PROVIDED THAT the Option shall terminate and be of no 
further force and effect upon the earliest to occur of:

               (i)   the Effective Time of the Merger; or

               (ii)  12 months after the first occurrence of a Purchase Event; 
or

               (iii) 18 months after the termination of the 
Reorganization Agreement on or following the occurrence of a Preliminary 
Purchase Event (as defined below); or

               (iv)  termination of the Reorganization Agreement in accordance 
with the terms thereof prior to the occurrence of a Purchase Event or a 
Preliminary Purchase Event; or

               (v)   the date on which the Reciprocal Option shall have become 
exercisable, in whole or in part, in accordance with its terms.

Notwithstanding anything to the contrary contained herein, (A) the Option may 
not be exercised at any time when Grantee shall be in breach of any of its 
covenants or agreements contained in the Reorganization Agreement such that 
Issuer shall be entitled (without regard to any grace period provided 
therein) to terminate the Reorganization Agreement pursuant to Section 
12b(xi) thereof, whether or not Issuer shall have so terminated the 
Reorganization Agreement; (B) this Agreement and the Option shall terminate 
automatically upon the termination of the Reorganization Agreement by Issuer 
pursuant to Section 12b(xi) thereof; and (C) any purchase of shares upon 
exercise of the Option shall be subject to compliance with applicable law, 
including, without limitation, the Bank Holding Company Act of 1956, as 
amended.  

                                       2

                                              Page 46 of 69 Pages



          (b)  As used herein, a "Purchase Event" means any of the following  
    events:

               (i)   The Board of Directors of Issuer shall have approved, or 
recommended to the Issuer's shareholders that they approve, a proposal 
received by Issuer from a person (other than Grantee or any subsidiary of 
Grantee) to effect an Acquisition Transaction (as defined below), Tender 
Offer (as defined below) or Exchange Offer (as defined below); or 

               (ii)  Issuer, without having received Grantee's prior written 
consent, shall have entered into an agreement with any person (other than 
Grantee or any subsidiary of Grantee) to effect an Acquisition Transaction; or

               (iii) any person (other than Grantee or any subsidiary of 
Grantee) shall have acquired beneficial ownership (as such term is defined in 
Rule 13d-3 promulgated under the Exchange Act) of or the right to acquire 
beneficial ownership of, or any "group" (as such term is defined under the 
Exchange Act and the rules and regulations promulgated thereunder) shall have 
been formed which beneficially owns or has the right to acquire beneficial 
ownership of fifteen percent (15%) or more of the then outstanding shares of 
Issuer Common Stock.

As used herein, the term "Acquisition Transaction" shall mean (A) a merger, 
consolidation or similar transaction involving Issuer or any of its 
subsidiaries (other than internal mergers, reorganizations, consolidations or 
dissolutions involving only Issuer and/or existing subsidiaries and other 
than a merger, consolidation or similar transaction in which the common 
shareholders of Issuer immediately prior thereto in the aggregate own at 
least seventy-five percent (75%) of the common stock of the surviving or 
successor corporation immediately after the consummation thereof), (B) the 
disposition, by sale, lease, exchange or otherwise, of fifteen (15%) or more 
of the consolidated assets or deposit liabilities of Issuer and its 
subsidiaries, or (C) a purchase or other acquisition (including by way of 
merger, consolidation, share exchange or any similar transaction), other than 
by Issuer or its subsidiaries, of securities representing fifteen percent 
(15%) or more of the voting power of Issuer or any of its subsidiaries.

          (c)  As used herein, a "Preliminary Purchase Event" means any of 
the following events:

               (i)  any person (other than Grantee or any subsidiary of 
Grantee) shall have acquired beneficial ownership of, or the right to acquire 
beneficial ownership of, or any "group" (as defined under the Exchange Act 
and the rules and regulations thereunder) shall have been formed which 
beneficially owns or has the right to acquire beneficial ownership of, ten 
percent (10%) or more of the then outstanding shares of Issuer Common Stock; 
or

                                       3

                                              Page 47 of 69 Pages





               (ii)  any person (other than Grantee or any subsidiary of 
Grantee) shall have commenced (as such term is defined in Rule 14d-2 under 
the Exchange Act), or shall have filed a registration statement under the 
Securities Act with respect to, a tender offer or exchange offer to purchase 
any shares of Issuer Common Stock such that, upon consummation of such offer, 
such person would own or control ten percent (10%) or more of the then 
outstanding shares of Issuer Common Stock (such an offer being referred to 
herein as a "Tender Offer" or an "Exchange Offer", respectively); or

               (iii) Issuer, without having received Grantee's prior 
written consent, shall have entered into an agreement with any person (other 
than Grantee or any subsidiary of Grantee) with respect to, or the Board of 
Directors of Issuer shall have recommended that the shareholders of Issuer 
approve or accept, a purchase or other acquisition (including by way of 
merger, consolidation, share exchange or any similar transaction), other than 
by Issuer or its subsidiaries, representing ten percent (10%) or more of the 
voting power of Issuer or any of its subsidiaries; or

               (iv)  any person (other than Grantee or any subsidiary of 
Grantee) shall have filed an application or notice with the Federal Reserve 
Board or other federal or state regulatory authority, which application or 
notice has been accepted for processing, for approval to engage in an 
Acquisition Transaction; or

               (v)   the holders of Issuer Common Stock shall not have 
approved the Reorganization Agreement at the meeting of such shareholders 
held for the purpose of voting on the Reorganization Agreement, such meeting 
shall not have been held or shall have been canceled prior to termination of 
the Reorganization Agreement, or Issuer's Board of Directors shall have 
withdrawn or modified in a manner adverse to Grantee the recommendation of 
Issuer's Board of Directors with respect to the Reorganization Agreement, in 
each case after it shall have been publicly announced that any person (other 
than Grantee or any subsidiary of Grantee) shall have (A) made or disclosed 
an intention to make a proposal to engage in an Acquisition Transaction or 
(B) commenced a Tender Offer or filed a registration statement under the 
Securities Act with respect to an Exchange Offer.

          (d)  Issuer shall notify Grantee promptly in writing of the 
occurrence of any Purchase Event or Preliminary Purchase Event; PROVIDED, 
HOWEVER, such notice shall not be a condition to the right of the Holder to 
exercise the Option.

          (e)  In the event Holder wishes to exercise the Option, it shall 
send to Issuer a written notice (dated the date on which it is sent to 
Issuer, which date is referred to as the "Notice Date") specifying (i) the 
total number of Option Shares it intends to purchase pursuant to such 
exercise and (ii) a date not earlier than three (3) business days nor later 
than fifteen (15) business days from the Notice Date for the closing (the 
"Closing") of such purchase (the "Closing Date").  The Closing shall be held 
at the Issuer's principal office or at such other place as Issuer and Holder 
may agree.  If prior notification to or approval of the Federal Reserve Board 
or any other regulatory authority is required as a condition precedent

                                       4

                                              Page 48 of 69 Pages



to such purchase, then (A) Holder shall promptly file and process the 
required notice or application for approval; (B) Issuer shall cooperate with 
Holder in the filing of the required notice or application for approval and 
the obtaining of any such approval; and (C) the Closing Date shall be subject 
to extension for such period of time, not to exceed six (6) months, as may be 
necessary to permit the Holder to submit such filing to, and, if necessary, 
to obtain such approval from, the Federal Reserve Board or other applicable 
regulatory authority; PROVIDED, HOWEVER, that the notice of Option exercise 
and such governmental filing must be made, and the Notice Date must be, no 
later than the date on which the Option would otherwise terminate.  Any 
exercise of the Option shall be deemed to have occurred on the Notice Date.

     4.   PAYMENT AND DELIVERY OF CERTIFICATES.

          (a)  On each Closing Date, Holder shall (i) pay to Issuer, in 
immediately available funds by wire transfer to a bank account designated by 
Issuer, an amount equal to the Purchase Price multiplied by the number of 
Option Shares to be purchased on such Closing Date and (ii) present and 
surrender this Agreement to the Issuer at the address of the Issuer specified 
in Section 11(g) hereof.

          (b)  At each Closing, simultaneously with the delivery of 
immediately available funds and surrender of this Agreement as provided in 
Section 4(a), (i) Issuer shall deliver to Holder (A) a certificate or 
certificates representing the Option Shares to be purchased at such Closing, 
which Option Shares shall be free and clear of all liens, claims, charges and 
encumbrances of any kind whatsoever, and (B) if the Option is exercised in 
part only, an executed new agreement with the same terms as this Agreement 
evidencing the right to purchase the balance of the shares of Issuer Common 
Stock purchasable hereunder; and (ii) Holder shall deliver to Issuer a letter 
agreeing that Holder shall not offer to sell or otherwise dispose of such 
Option Shares in violation of the provisions of this Agreement or applicable 
state and federal securities laws.

          (c)  Certificates for the Option Shares delivered at each Closing 
shall be endorsed with a restrictive legend which shall read substantially as 
follows:

     THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
     UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT") OR QUALIFIED
     OR REGISTERED UNDER THE SECURITIES LAWS OF ANY STATE.  THEY MAY NOT BE
     SOLD OR TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION
     STATEMENT UNDER THE ACT AND UNTIL THEY HAVE BEEN QUALIFIED OR
     REGISTERED UNDER APPLICABLE STATE SECURITIES LAWS, UNLESS THE ISSUER
     RECEIVES AN OPINION OF COUNSEL FOR THE HOLDER OF THESE SECURITIES,
     REASONABLY SATISFACTORY TO THE ISSUER, STATING THAT SUCH SALE OR
     TRANSFER IS EXEMPT FROM THE REGISTRATION AND PROSPECTUS DELIVERY
     REQUIREMENTS OF THE ACT AND ANY APPLICABLE STATE SECURITIES LAWS.  THE
     TRANSFER OF THE

                                       5

                                              Page 49 of 69 Pages



     SECURITIES REPRESENTED BY THIS CERTIFICATE IS ALSO
     SUBJECT TO RESALE RESTRICTIONS ARISING UNDER THE TERMS OF A STOCK
     OPTION AGREEMENT DATED AS OF JUNE 5, 1996, A COPY OF WHICH IS
     AVAILABLE FOR INSPECTION AT THE OFFICE OF THE SECRETARY OF THE ISSUER.

It is understood and agreed that the above legend shall be removed by 
delivery of substitute certificate(s) without such legend if Holder shall 
have delivered to Issuer a copy of a letter from the staff of the SEC, or an 
opinion of counsel in form and substance reasonably satisfactory to Issuer 
and its counsel, to the effect that such legend is not required for purposes 
of the Securities Act or applicable state securities laws.

     5.   REPRESENTATIONS AND WARRANTIES OF ISSUER.  Issuer hereby represents 
and warrants to Grantee as follows:

          (a)  DUE AUTHORIZATION.  Issuer has all requisite corporate power 
and authority to enter into this Agreement and, subject to any approvals 
referred to herein, to consummate the transactions contemplated hereby.  The 
execution and delivery of this Agreement and the consummation of the 
transactions contemplated hereby have been duly authorized by all necessary 
corporate action on the part of Issuer.  This Agreement has been duly 
executed and delivered by Issuer.

          (b)  AUTHORIZED STOCK.  Issuer has taken all necessary corporate 
action to authorize and reserve and to permit it to issue, and, at all times 
from the date hereof until the obligation to deliver Issuer Common Stock upon 
the exercise of the Option terminates, will have reserved for issuance, upon 
exercise of the Option, shares of Issuer Common Stock necessary for Holder to 
exercise the Option, and Issuer will take all necessary corporate action to 
authorize and reserve for issuance all additional shares of Issuer Common 
Stock or other securities which may be issued pursuant to Section 7 upon 
exercise of the Option.  The shares of Issuer Common Stock to be issued upon 
due exercise of the Option, including all additional shares of Issuer Common 
Stock or other securities which may be issuable pursuant to Section 7, upon 
issuance pursuant hereto, shall be duly and validly issued, fully paid and 
nonassessable, and shall be delivered free and clear of all liens, claims, 
charges and encumbrances of any kind or nature whatsoever, including any 
preemptive rights of any stockholder of Issuer.

     6.   REPRESENTATIONS AND WARRANTIES OF GRANTEE.  Grantee hereby 
represents and warrants to Issuer that:

          (a)  DUE AUTHORIZATION.  Grantee has all requisite corporate power 
and authority to enter into this Agreement and, subject to any approvals or 
consents referred to herein, to consummate the transactions contemplated 
hereby.  The execution and delivery of this Agreement and the consummation of 
the transactions contemplated hereby have been duly

                                       6

                                              Page 50 of 69 Pages



authorized by all necessary corporate action on the part of Grantee.  This 
Agreement has been duly executed and delivered by Grantee.

          (b)  PURCHASE NOT FOR DISTRIBUTION.  This Option is not being, and 
any Option Shares or other securities acquired by Grantee upon exercise of 
the Option will not be, acquired with a view to the public distribution 
thereof and will not be transferred or otherwise disposed of except in a 
transaction registered or exempt from registration under the Securities Act 
and applicable state securities laws.

     7.   ADJUSTMENT UPON CHANGES IN CAPITALIZATION, ETC.

          (a)  In the event of any change in Issuer Common Stock by reason of 
a stock dividend, stock split, split-up, recapitalization, combination, 
exchange of shares or similar transaction, the type and number of shares or 
securities subject to the Option, and the Purchase Price therefor, shall be 
adjusted appropriately, and proper provision shall be made in the 
documentation pertaining to such transaction so that Holder shall receive, 
upon exercise of the Option, the number and class of shares or other 
securities or property that Holder would have received in respect of Issuer 
Common Stock if the Option had been exercised immediately prior to such 
event, or the record date therefor, as applicable.  If any additional shares 
of Issuer Common Stock are issued after the date of this Agreement (whether 
upon exercise of stock options or otherwise but excluding any issuance 
pursuant to an event described in the first sentence of this Section 7(a)), 
the number of shares of Issuer Common Stock subject to the Option shall be 
adjusted so that, after such issuance, such number of shares, together with 
any shares of Issuer Common Stock previously issued pursuant hereto, equals 
nineteen percent (19%) of the number of shares of Issuer Common Stock then 
issued and outstanding, without giving effect to any shares subject to or 
issued pursuant to the Option (with any fractional share being rounded up to 
the next full share).  Issuer agrees that in no event shall the number of 
shares of Issuer Common Stock issued after the date of this Agreement 
pursuant to the preceding sentence, together with the number of shares of 
Issuer Common Stock subject to the Option, adjusted as aforesaid, exceed the 
number of available authorized but unissued and unreserved shares of Issuer 
Common Stock.

          (b)  In the event that Issuer shall, prior to the occurrence of an 
event set forth in Section 3(a) terminating the Holder's right to exercise 
the Option, enter into an agreement (i) to consolidate with or merge into any 
person, other than Grantee or one of its subsidiaries, and shall not be the 
continuing or surviving corporation of such consolidation or merger, (ii) to 
permit any person, other than Grantee or one of its subsidiaries, to merge 
into Issuer and Issuer shall be the continuing or surviving corporation, but, 
in connection with such merger, the then outstanding shares of Issuer Common 
Stock shall be changed into or exchanged for stock or other securities of 
Issuer or any other person or cash or any other property or the outstanding 
shares of Issuer Common Stock immediately prior to such merger shall after 
such merger represent less than fifty percent (50%) of the outstanding shares 
and share equivalents of the merged company, or (iii) to sell or otherwise 
transfer all or substantially all of its consolidated assets or deposit 
liabilities to any person other than

                                       7

                                              Page 51 of 69 Pages



Grantee or one of its subsidiaries, then, and in each such case, the 
agreement governing such transaction shall make proper provisions so that the 
Option shall, upon the consummation of any such transaction and upon the 
terms and conditions set forth herein, be converted into, or exchanged for, 
an option (the "Substitute Option"), at the election of Grantee, of either 
(A) the Acquiring Corporation (as defined below), or (B) any person that 
controls the Acquiring Corporation, (such person being referred to as the 
"Substitute Option Issuer").

          (c)  The Substitute Option shall have the same terms as the Option, 
PROVIDED THAT if the terms of the Substitute Option cannot, for legal 
reasons, be the same as the Option, such terms shall be as similar as 
possible and in no event less advantageous to Grantee.  The Substitute Option 
Issuer shall also enter into an agreement with the then holder or holders of 
the Substitute Option in substantially the same form as this Agreement (after 
giving effect for such purposes to the provisions of this Agreement), which 
shall be applicable to the Substitute Option.

          (d)  The Substitute Option shall be exercisable for such number of 
shares of the Substitute Common Stock (as is hereinafter defined) as is equal 
to the Assigned Value (as is hereinafter defined) multiplied by the number of 
shares of the Issuer Common Stock for which the Option was theretofore 
exercisable, divided by the Average Price (as is hereinafter defined).  The 
exercise price of the Substitute Option per share of the Substitute Common 
Stock (the "Substitute Purchase Price") shall then be equal to the Purchase 
Price multiplied by a fraction in which the numerator is the number of shares 
of the Issuer Common Stock for which the Option was theretofore exercisable 
and the denominator is the number of shares of the Substitute Common Stock 
for which the Substitute Option is exercisable.

          (e)  As used herein, the following terms have the meanings indicated:

               (i)   "Acquiring Corporation" shall mean (A) the continuing or 
surviving corporation of a consolidation or merger with Issuer (if other than 
Issuer), (B) Issuer in a merger in which Issuer is the continuing or 
surviving person, and (C) the transferee of all or any substantial part of 
the Issuer's assets (or the assets of its subsidiaries).

               (ii)  "Substitute Common Stock" shall mean the common stock 
issued by the Substitute Option Issuer upon exercise of the Substitute Option.

               (iii) "Assigned Value" shall mean the highest of (A) the 
price per share of the Issuer Common Stock at which a Tender Offer or 
Exchange Offer therefor has been made by any person (other than Grantee or a 
subsidiary of Grantee), (B) the price per share of the Issuer Common Stock to 
be paid by any person (other than Grantee or a subsidiary of Grantee) 
pursuant to an agreement with Issuer, and (C) the highest closing price per 
share of Issuer Common Stock as quoted on the principal trading market or 
securities exchange on which such shares are traded as reported by a 
recognized source within the six-month period immediately preceding the 
effective date of the agreement governing the transaction described in 
Section 7(b) which gave rise to the Substitute Option; PROVIDED,

                                       8

                                              Page 52 of 69 Pages



HOWEVER, that in the event of a sale of less than all of Issuer's 
consolidated assets or deposit liabilities, the Assigned Value shall be the 
sum of the price paid in such sale for such assets or deposit liabilities and 
the current market value of the remaining consolidated net assets of Issuer 
as determined by a nationally recognized investment banking firm selected by 
the Holder (or by a majority in interest of the Holders if there shall be 
more than one Holder (a "Holder Majority")) and reasonably acceptable to 
Issuer, divided by the number of shares of the Issuer Common Stock 
outstanding at the time of such sale.  In the event that an exchange offer is 
made for the Issuer Common Stock or an agreement is entered into for a merger 
or consolidation involving consideration other than cash, the value of the 
securities or other property issuable or deliverable in exchange for the 
Issuer Common Stock shall be determined by a nationally recognized investment 
banking firm by Holder (or a Holder Majority) and reasonably acceptable to 
Issuer.

               (iv) "Average Price" shall mean the average closing price of a 
share of the Substitute Common Stock for the one year immediately preceding 
the effective date of the consolidation, merger or sale in question, but in 
no event higher than the closing price of the shares of the Substitute Common 
Stock on the day preceding such consolidation, merger or sale; PROVIDED THAT 
if Issuer is the issuer of the Substitute Option, the Average Price shall be 
computed with respect to a share of common stock issued by Issuer, the person 
merging into Issuer or by any company which controls or is controlled by such 
merging person, as Holder may elect.

          (f)  In no event, pursuant to any of the foregoing paragraphs, 
shall the Substitute Option be exercisable for more than nineteen percent 
(19%) of the aggregate of the shares of the Substitute Common Stock 
outstanding prior to exercise of the Substitute Option (with any fractional 
share being rounded up to the next full share).

          (g)  Issuer shall not enter into any transaction described in 
subsection (b) of this Section 7 unless the Acquiring Corporation and any 
person that controls the Acquiring Corporation assume in writing all the 
obligations of Issuer hereunder and take all other actions that may be 
necessary so that the provisions of this Section 7 are given full force and 
effect (including, without limitation, any action that may be necessary so 
that the shares of Substitute Common Stock are in no way distinguishable from 
or have lesser economic value than other shares of common stock issued by the 
Substitute Option Issuer).

          (h)  At the written request of Holder delivered to the Substitute 
Option Issuer prior to the occurrence of an event set forth in Section 3(a) 
above terminating the Substitute Option, the Substitute Option Issuer shall 
repurchase from Holder (i) the Substitute Option and/or (ii) all Substitute 
Common Stock theretofore purchased by Holder pursuant hereto with respect to 
which Holder then has beneficial ownership.  The date on which Holder 
exercises its rights under this Section 7(h) is referred to as the 
"Substitute Option Request Date."  Such repurchase shall be at an aggregate 
price (the "Substitute Option Repurchase Consideration") equal to the sum of 
(A) the excess, if any, of (1) the Highest Closing Price (as defined below) 
for each share of Substitute Common Stock over (2) the Substitute

                                       9

                                              Page 53 of 69 Pages



Purchase Price per share of Substitute Common Stock, multiplied by the number 
of shares of Substitute Common Stock for which the Substitute Option may then 
be exercised and as to which Holder has exercised its repurchase right 
hereunder, plus (B) the Highest Closing Price for each share of Substitute 
Common Stock multiplied by the number of shares of Substitute Common Stock 
acquired by Holder upon exercise of the Option or Substitute Option and as to 
which Holder has exercised its repurchase right hereunder.  The term "Highest 
Closing Price" shall mean the highest bid price per share of Substitute 
Common Stock as quoted by the brokerage firms acting as market makers for the 
Substitute Common Stock prior to the listing of the Substitute Common Stock 
on any national securities exchange and thereafter as reported by the 
principal trading market or securities exchange on which such shares are 
traded, during the sixty (60) business days preceding the Substitute Option 
Request Date.

          (i)  The provisions of Sections 8(b), 8(c), 9 and shall apply, with 
appropriate adjustments, to any securities for which the Option becomes 
exercisable pursuant to this Section 7 and as applicable, references in such 
sections to "Issuer", "Option", "Purchase Price", "Issuer Common Stock", 
"Repurchase Consideration", and "Request Date" shall be deemed to be 
references to "Substitute Option Issuer", "Substitute Option", "Substitute 
Purchase Price", "Substitute Common Stock", "Substitute Option Repurchase 
Consideration", and "Substitute Option Request Date", respectively.

     8.   REPURCHASE AT THE OPTION OF GRANTEE.

          (a)  At any time after the first occurrence of a Repurchase Event 
(as defined in Section 8(e) below), at the written request of Holder 
delivered to Issuer prior to the occurrence of an event set forth in Section 
3(a) above terminating the Option, Issuer shall repurchase from Holder (i) 
the Option and (ii) all Option Shares theretofore purchased by Holder 
pursuant hereto with respect to which Holder then has beneficial ownership.  
The date on which Holder exercises its rights under this Section 8 is 
referred to as the "Request Date." Such repurchase shall be at an aggregate 
price (the "Repurchase Consideration") equal to the sum of:

               (i)   the aggregate Purchase Price paid by Holder for any 
Option Shares acquired pursuant to the Option with respect to which Holder 
then has beneficial ownership;

               (ii)  the excess, if any, of (A) the Applicable Price (as 
defined below) for each Option Share over (B) the Purchase Price per Option 
Share (subject to adjustment pursuant to Section 7(a)), multiplied by the 
number of Option Shares with respect to which the Option has not been 
exercised; and

               (iii) the excess, if any, of the Applicable Price over the 
Purchase Price (subject to adjustment pursuant to Section 7(a)) paid (or, in 
the case of Option Shares with respect to which the Option has been 
exercised but the Closing Date has not occurred, payable) by Holder for each 
Option Share with respect to which the Option has been

                                       10

                                              Page 54 of 69 Pages



exercised and with respect to which Holder then has beneficial ownership, 
multiplied by the number of such shares.

          (b)  If Holder exercises its rights under this Section 8, Issuer 
shall, within ten (10) business days after the Request Date, pay the 
Repurchase Consideration to Holder in immediately available funds, and Holder 
shall surrender to Issuer the Option and the certificates evidencing the 
Option Shares purchased thereunder with respect to which Holder then has 
beneficial ownership and has designated to be repurchased, and Holder shall 
warrant that it has sole record and beneficial ownership of such shares and 
that the same are then free and clear of all liens, claims, charges and 
encumbrances of any kind whatsoever. 

          (c)  Notwithstanding the provisions hereof to the contrary, to the 
extent that Issuer is prohibited under applicable law, regulation or 
administrative policy from repurchasing all or any portion of the Option or 
Option Shares, then (i) Issuer shall promptly give notice of such fact to 
Holder; (ii) Issuer shall, from time to time subject to the last sentence of 
this Section 8(c), deliver to Holder that portion of the Repurchase 
Consideration that it is not then so prohibited from paying; (iii) at 
Holder's request, Issuer shall promptly file any required notice or 
application for approval and expeditiously process the same.  After Holder's 
receipt of such notice from Issuer, Issuer shall not be in breach of its 
repurchase obligation hereunder to the extent it is or remains, despite 
reasonable efforts to obtain any required approvals, legally prohibited from 
repurchasing the Option or Option Shares.  Holder shall have the right (A) to 
revoke its request for repurchase with respect to the portion of the Option 
or Option Shares that Issuer is prohibited from repurchasing, (B) to require 
Issuer to deliver to Holder the Option and/or Option Shares Issuer is 
prohibited from repurchasing, and (C) to exercise the Option as to the number 
of Option Shares for which the Option was exercisable at the Request Date 
less the number of such Option Shares in respect of which the Repurchase 
Consideration has been lawfully paid. Notwithstanding anything herein to the 
contrary, Issuer shall not be obligated to repurchase all or any part of the 
Option or Option Shares pursuant to more than one written request from 
Holder, except that Issuer shall be obligated to repurchase, pursuant to more 
than one written request, any Option or Option Shares in the event that 
Holder (1) has revoked its request for repurchase in accordance with the 
provisions of this Section 8 prior to the occurrence of an event set forth in 
Section 3(a) terminating the Holder's right to exercise the Option and (2) 
has delivered, prior to such event, a new written notice requesting a 
repurchase.  If an event set forth in Section 3(a) terminating the Holder's 
right to exercise the Option occurs prior to, or is scheduled to occur 
within, sixty (60) days after the date of the notice by Issuer described in 
clause 8(c)(i) above, then, notwithstanding the occurrence of such 
terminating event, Holder shall have the right to receive the Repurchase 
Consideration to the extent Issuer is or becomes, within a sixty (60) day 
period from the date of such notice by Issuer, legally permitted to 
repurchase.  Except as set forth in the preceding sentence, Holder's 
repurchase rights under this Agreement shall terminate concurrently with the 
termination of Holder's right to exercise the Option, pursuant to Section 
3(a).

                                       11

                                              Page 55 of 69 Pages



          (d)  For purposes of this Agreement, the "Applicable Price" means 
the highest of (i) the highest price per share of Issuer Common Stock paid 
for any such share by the person or groups described in Section 8(e)(i), (ii) 
the price per share of Issuer Common Stock received by holders of Issuer 
Common Stock in connection with any merger or other business combination 
transaction described in Section 7(b)(i), 7(b)(ii) or 7(b)(iii), or (iii) the 
highest closing price per share of Issuer Common Stock as quoted on the 
principal trading market or securities exchange on which such shares are 
traded as reported by a recognized source during the sixty (60) business days 
preceding the Request Date; PROVIDED, HOWEVER, that in the event of a sale of 
less than all of Issuer's assets, the Applicable Price shall be the sum of 
the price paid in such sale for such assets or deposit liabilities and the 
current market value of the remaining consolidated net assets of Issuer as 
determined by a nationally recognized investment banking firm selected by 
Holder (or the Holder Majority) and reasonably acceptable to Issuer, divided 
by the number of shares of the Issuer Common Stock outstanding at the time of 
such sale.  If the consideration to be offered, paid or received pursuant to 
either of the foregoing clauses (i) or (ii) shall be other than in cash, the 
value of such consideration shall be determined in good faith by an 
independent nationally recognized investment banking firm selected by Holder 
(or the Holder Majority) and reasonably acceptable to Issuer, which 
determination shall be conclusive for all purposes of this Agreement.

          (e)  As used herein, a "Repurchase Event" shall occur if (i) any 
person (other than Grantee or any subsidiary of Grantee) shall have acquired 
beneficial ownership of (as such term is defined in Rule 13d-3 promulgated 
under the Exchange Act) or the right to acquire beneficial ownership of, or 
any "group" (as such term is defined under the Exchange Act and the rules and 
regulations promulgated thereunder) shall have been formed which beneficially 
owns, or has the right to acquire beneficial ownership of, fifty percent 
(50%) or more of the then outstanding shares of Issuer Common Stock or (ii) 
any of the transactions described in Section 7(b)(i), 7(b)(ii) or 7(b)(iii) 
shall be consummated.

     9.   LISTING.  If Issuer Common Stock or any other securities to be 
acquired upon exercise of the Option are not then authorized for quotation on 
the NASDAQ Stock Market National Market System or any securities exchange, 
Issuer, upon the request of Holder, will promptly file an application to 
authorize for quotation the shares of Issuer Common Stock or other securities 
to be acquired upon exercise of the Option on the NASDAQ Stock Market 
National Market System or such other securities exchange and will use its 
best efforts to obtain approval of such listing as soon as practicable.

     10.  DIVISION OF OPTION.  This Agreement (and the Option granted hereby) 
are exchangeable, without expense, at the option of Holder, upon presentation 
and surrender of this Agreement at the principal office of Issuer for other 
agreements providing for other options of different denominations entitling 
the holder thereof to purchase in the aggregate the same number of shares of 
Issuer Common Stock purchasable hereunder.  The terms "other agreements" and 
"other options" as used in the preceding sentence mean any other agreements 
and related options for which this Agreement (and the Option granted hereby) 
may be

                                       12

                                              Page 56 of 69 Pages



exchanged.  Upon receipt by Issuer of evidence reasonably satisfactory 
to it of the loss, theft, destruction or mutilation of this Agreement, and 
(in the case of loss, theft or destruction) of reasonably satisfactory 
indemnification, and upon surrender and cancellation of this Agreement, if 
mutilated, Issuer will execute and deliver a new Agreement of like tenor and 
date.  Any such new Agreement executed and delivered shall constitute an 
additional contractual obligation on the part of Issuer, whether or not the 
Agreement so lost, stolen, destroyed or mutilated shall at any time be 
enforceable by anyone.

     11.  MISCELLANEOUS.

          (a)  EXPENSES.  Except as otherwise provided in Section 9, each of 
the parties hereto and any Holder shall bear and pay all costs and expenses 
incurred by it or on its behalf in connection with the transactions 
contemplated hereunder, including, without limitation, fees and expenses of 
its own financial consultants, investment bankers, accountants and counsel.

          (b)  WAIVER AND AMENDMENT.  Any provision of this Agreement may be 
waived at any time by the party that is entitled to the benefits of such 
provision.  This Agreement may not be modified, amended, altered or 
supplemented except upon the execution and delivery of a written agreement 
executed by the parties hereto.

          (c)  ENTIRE AGREEMENT; NO THIRD-PARTY BENEFICIARY.  This Agreement, 
together with the Reorganization Agreement and the other documents and 
instruments referred to herein and therein (i) constitutes the entire 
agreement and supersedes all prior agreements and understandings, both 
written and oral, between the parties with respect to the subject matter 
hereof and (ii) is not intended to confer upon any person other than the 
parties hereto any rights or remedies hereunder.  

          (d)  Severability.  If any term, provision, covenant or restriction 
of this Agreement is held by a court or a federal or state regulatory 
authority of competent jurisdiction to be invalid, void or unenforceable, 
such invalid, void or unenforceable term, provision, covenant or restriction 
shall, if it is so susceptible, be deemed modified to the minimum extent 
necessary to render the same valid and enforceable and, in all events, the 
remainder of the terms, provisions, covenants and restrictions of this 
Agreement shall remain in full force and effect and shall in no way be 
affected, impaired or invalidated. Without limiting the foregoing, if for any 
reason such court or regulatory authority determines that Holder may not 
legally acquire, or Issuer may not legally repurchase, the full number of 
shares of Issuer Common Stock as provided in Sections 3 and 8 (as adjusted 
pursuant to Section 7), it is the express intention of Issuer to allow Holder 
to acquire or to require Issuer to repurchase the maximum number of shares as 
may be legally permissible without any amendment or modification hereof.

                                       13

                                              Page 57 of 69 Pages




          (e)  GOVERNING LAW.  This Agreement shall be governed and construed 
in accordance with the laws of the State of California without regard to any 
applicable conflicts of law rules.

          (f)  DESCRIPTIVE HEADINGS.  The descriptive headings contained 
herein are for convenience of reference only and shall not affect in any way 
the meaning or interpretation of this Agreement.

          (g)  NOTICES.  All notices, requests, claims, demands and other 
communications under this Agreement shall be in writing and shall be given 
(and shall be deemed to have been duly received if so given) by personal 
delivery, by telecopy (PROVIDED THAT copy is concurrently sent by first class 
U.S. mail, postage prepaid), or by mail (registered or certified mail, 
postage prepaid, return receipt requested) to the parties as follows:

          If to Issuer:       Cupertino National Bancorp
                              20230 Stevens Creek Boulevard
                              Cupertino, CA  95014
                              Attn:  C. Donald Allen, President
                              Fax No.:  408-996-2465

          If to Grantee:      Mid-Peninsula Bancorp
                              420 Cowper Street
                              Palo Alto, CA  94301-1504
                              Attn:  David L. Kalkbrenner, President
                              Fax No.:  415-323-7421

or to such other address as a party may have furnished to the others in 
writing in accordance with this paragraph, except that notices of change of 
address shall only be effective upon receipt.  Any notice, demand or other 
communication given pursuant to the provisions of this Section 11(g) shall be 
deemed to have been given on the date actually delivered or on the third day 
following the date mailed, whichever first occurs.

          (h)  COUNTERPARTS.  This Agreement and any amendments hereto may be 
executed in two counterparts, each of which shall be considered one and the 
same agreement and shall become effective when both counterparts have been 
signed, it being understood that both parties need not sign the same 
counterpart.

          (i)  ASSIGNMENT.  Neither this Agreement nor any of the rights, 
interests or obligations hereunder or under the Option shall be assigned by 
any of the parties hereto without the prior written consent of the other 
party, except that Grantee may assign this Agreement to a wholly-owned 
subsidiary of Grantee upon compliance with applicable laws.  Subject to the 
preceding sentence, this Agreement shall be binding upon, inure to the 
benefit of, and be enforceable by the parties and their respective successors 
and permitted assigns.

                                       14

                                              Page 58 of 69 Pages



          (j)  FURTHER ASSURANCES.  In the event of any exercise of the 
Option by Holder, Issuer and Holder shall execute and deliver all other 
documents and instruments and take all other action that may be reasonably 
necessary in order to consummate the transactions provided for by such 
exercise.

          (k)  SPECIFIC PERFORMANCE.  The parties hereto agree that this 
Agreement may be enforced by either party through specific performance, 
injunctive relief and other equitable relief.  Both parties further agree to 
waive any requirement for the securing or posting of any bond in connection 
with the obtaining of any such equitable relief and that this provision is 
without prejudice to any other rights that the parties hereto may have for 
any failure to perform this Agreement.

     IN WITNESS WHEREOF, Issuer and Grantee have caused this Stock Option 
Agreement to be signed by their respective officers thereunto duly 
authorized, all as of the day and year first written above.

CUPERTINO NATIONAL BANCORP         MID-PENINSULA BANCORP


By--------------------             By-----------------------------
     C. Donald Allen                     David L. Kalkbrenner
     President                           President


                                       15

                                              Page 59 of 69 Pages