EXHIBIT 99.1


                                                                 

                       The Commonwealth of Massachusetts
                             William Francis Galvin
                         Secretary of the Commonwealth
             One Ashburton Place, Boston, Massachusetts 02108-1512

                            ARTICLES OF ORGANIZATION
                          (General Laws, Chapter 156B)


                                    ARTICLE I

                      The exact name of the corporation is:


                                SIS BANCORP, INC.


                                   ARTICLE II

          The purpose of the corporation is to engage in the following
                              business activities:

              See Exhibit A attached hereto and made a part hereof.









                                      







                                   ARTICLE III

State the total  number of shares and par value,  if any, of each class of stock
which the corporation is authorized to issue.

      WITHOUT PAR VALUE                          WITH PAR VALUE
- ------------------------------    ------------------------------------------
TYPE         NUMBER OF SHARES      TYPE      NUMBER OF SHARES      PAR VALUE
- ----         ----------------      ----      ----------------      ---------
Common:                           Common:         250,000             $.01

Preferred:                        Preferred:       50,000             $.01



                                   ARTICLE IV

If  more  than  one  class  of  stock  is  authorized,  state  a  distinguishing
designation  for each class.  Prior to the issuance of any shares of a class, if
shares  of  another  class  are  outstanding,  the  corporation  must  provide a
description of the preferences,  voting powers,  qualifications,  and special or
relative  rights or  privileges  of that class and of each other  class of which
shares are outstanding and of each series then established within any class.


See Exhibit B attached hereto and made a part hereof.




                                    ARTICLE V

The  restrictions,  if any,  imposed by the  Articles of  Organization  upon the
transfer of shares of stock of any class are:


None




                                   ARTICLE VI

Other  lawful  provisions,  if any,  for the  conduct  and  regulation  of the
business and affairs of the corporation,  for its voluntary dissolution,  or for
limiting,  defining,  or  regulating  the powers of the  corporation,  or of its
directors or stockholders, or of any class of stockholders:

See Exhibit C attached hereto and made a part hereof.





                                      




                               SIS BANCORP, INC.

                            ARTICLES OF ORGANIZATION

                                   EXHIBIT A

ARTICLE II: Purposes

1. Buying, selling, investing in, holding and dealing in property of every
   nature and description, real and personal, tangible and intangible;

2. Acquiring,  investing in and holding stock in any subsidiary  permitted under
   the Bank  Holding  Company Act of 1956 or Chapter  167A of the  Massachusetts
   General Laws, as such statutes may be amended from time to time, and engaging
   in any other activity or enterprise permitted to a bank holding company under
   said statutes or other applicable law; and

3. In general,  engaging in any other  business which may lawfully be carried on
   by a  corporation  organized  under  the  Business  Corporation  Law  of  the
   Commonwealth of Massachusetts, as amended from time to time.


                                    



                               SIS BANCORP, INC.

                            ARTICLES OF ORGANIZATION

                                   EXHIBIT B

ARTICLE IV: Description of Each of the Different Classes of Stock

  A description of the different classes and series of the Corporation's capital
stock and a statement of the designations  and the relative rights,  preferences
and  limitations  of the shares of each class and series of capital stock are as
follows:

  Section 4.1 Common Stock.  Except as provided by law or in this Article IV (or
in any  supplementary  sections hereto or in any certificate of establishment of
any  series  of  preferred  stock),  the  holders  of  the  common  stock  shall
exclusively  possess all voting  power.  Each  holder of shares of common  stock
shall be entitled to one vote on all matters for each share held by such holder.
There shall be no cumulative voting rights in the election of Directors.

  Whenever there shall have been paid, or declared and set aside for payment, to
the holders of the  outstanding  shares of any class of stock having  preference
over the  common  stock as to the  payment  of  dividends,  the full  amount  of
dividends  and of a  sinking  fund  or a  retirement  fund or  other  retirement
payments,  if any, to which such holders are respectively entitled in preference
to the common stock,  then  dividends may be paid on the common stock and on any
class or series of stock entitled to participate therewith as to dividends,  out
of any assets legally available for the payment of dividends;  but only when and
as declared by the Board of Directors.

  Subject to Section 6.4 of these Articles of Organization,  in the event of any
liquidation,  dissolution  or winding up of the  Corporation,  after there shall
have been paid to or set aside for the  holders of any class  having  preference
over the common stock in the event of liquidation,  dissolution or winding up of
the Corporation  the full  preferential  amounts to which they are  respectively
entitled,  the holders of the common stock,  and of any class or series of stock
entitled to  participate  in whole or in part  therewith as to  distribution  of
assets,  shall be entitled,  after payment or provision for payment of all debts
and  liabilities  of the  Corporation,  to receive the  remaining  assets of the
Corporation  available  for  distribution,  in cash or in kind, in proportion to
their holdings.

  Section 4.2  Preferred  Stock.  The Board of Directors of the  Corporation  is
authorized  by vote or votes,  from time to time  adopted,  to  provide  for the
issuance of preferred stock (the "Preferred Stock") in one or more series and to
fix  and  state  the  voting  powers,  designations,  preferences  and  relative
participating, optional or other special rights of the shares of each series and
the qualifications,  limitations and restrictions  thereof,  including,  but not
limited to, determination of one or more of the following:

      (1)  The  distinctive   serial   designation  and  the  number  of  shares
    constituting such series;

      (2) The dividend rates or the amount of dividends to be paid on the shares
    of such series, whether dividends shall be cumulative and, if so, from which
    date or dates, the payment date or dates for dividends and the participating
    or other special rights, if any, with respect to dividends;

      (3) The voting powers, if any, of shares of such series;

      (4) Whether the shares of such series shall be redeemable  and, if so, the
    price or prices at which, and the terms and conditions on which, such shares
    may be redeemed;

      (5) The amount or amounts  payable  upon the shares of such  series in the
    event of voluntary or involuntary liquidation,  dissolution or winding up of
    the Corporation;

      (6) Whether the shares of such series  shall be entitled to the benefit of
    a sinking or retirement  fund to be applied to the purchase or redemption of
    such shares,  and if so entitled,  the amount of such fund and the manner of
    its  application,  including the price or prices at which such shares may be
    redeemed or purchased through the application of such fund;


                                      




      (7)  Whether  the shares of such  series  shall be  convertible  into,  or
    exchangeable  for,  shares of any  other  class or  classes  or of any other
    series  of  the  same  or  any  other  class  or  classes  of  stock  of the
    Corporation, and if so convertible or exchangeable,  the conversion price or
    prices, or the rate or rates of exchange,  and the adjustments  thereof,  if
    any, at which such  conversion or exchange may be made,  and any other terms
    and conditions of such conversion or exchange;

      (8) The price or other  consideration  for which the shares of such series
    shall be issued;

      (9)  Whether  the shares of such series  which are  redeemed or  converted
    shall have the status of authorized but unissued  shares of preferred  stock
    and  whether  such shares may be reissued as shares of the same or any other
    series of stock; and

      (10) Such other powers, preferences,  rights, qualifications,  limitations
    and  restrictions  thereof  as are  permitted  by law  and as the  Board  of
    Directors of the Corporation may deem advisable.

  Unless  otherwise  provided by law, any such vote shall become  effective when
the  Corporation  files  with the  Secretary  of State  of the  Commonwealth  of
Massachusetts  a certificate  of  designation of one or more series of preferred
stock signed by the President or any Vice President and by the Clerk,  Assistant
Clerk, Secretary or Assistant Secretary of the Corporation, setting forth a copy
of the vote of the Board of Directors  establishing  and  designating the series
and fixing and determining the relative rights and preferences thereof, the date
of adoption of such vote and a certification  that such vote was duly adopted by
the Board of Directors.
                                     



                               SIS BANCORP, INC.

                            ARTICLES OF ORGANIZATION

                                   EXHIBIT C

ARTICLE VI: Other Lawful Provisions

  Section 6.1 Issuance of Rights. The Board of Directors is hereby authorized to
create and issue, whether or not in connection with the issuance and sale of any
of its stock or other  securities  or  property,  rights  entitling  the holders
thereof to purchase  or receive  from the  Corporation  shares of stock or other
securities or assets of the  Corporation or any other  corporation,  recognizing
that,  under  certain  circumstances,  the  creation and issuance of such rights
could have the effect of discouraging  third parties from seeking,  or impairing
their  ability to seek,  to  acquire a  significant  portion of the  outstanding
securities of the Corporation,  to engage in any transaction  which might result
in a change  of  control  of the  Corporation  or to enter  into any  agreement,
arrangement or  understanding  with another party to accomplish the foregoing or
for the purpose of acquiring,  holding, voting or disposing of any securities of
the Corporation.  The times at which and the terms upon which such rights are to
be issued  will be  determined  by the Board of  Directors  and set forth in the
contracts or instruments that evidence such right. The authority of the Board of
Directors  with  respect to such rights  shall  include,  but not be limited to,
determination of the following:

      (1) The  initial  purchase  price per share or other  unit of the stock or
    other securities or property to be purchased upon exercise of such rights.

      (2) Provisions  relating to the times at which and the circumstances under
    which such rights may be exercised or sold or otherwise transferred,  either
    together with or separately from, any other stock or other securities of the
    Corporation.

      (3) Provisions which adjust the number or exercise price of such rights or
    amount or nature of the stock or other  securities  or  property  receivable
    upon  exercise  of such  rights  in the  event  of a  combination,  split or
    recapitalization  of any stock of the Corporation,  a change in ownership of
    the  Corporation's  stock or other securities or a  reorganization,  merger,
    consolidation,   sale  of  assets  or  other  occurrence   relating  to  the
    Corporation or any stock of the Corporation,  and provisions restricting the
    ability  of the  Corporation  to enter into any such  transaction  absent an
    assumption by the other party or parties  thereto of the  obligations of the
    Corporation under such rights.

      (4)  Provisions  which deny the holder of a  specified  percentage  of the
    outstanding  stock or  other  securities  of the  Corporation  the  right to
    exercise  such rights  and/or cause the rights held by such holder to become
    void.

      (5)  Provisions  which permit the  Corporation  to redeem or exchange such
    rights,  which  redemption or exchange may be within the sole  discretion of
    the Board of  Directors,  if the Board of Directors  reserves  such right to
    itself.

      (6) The appointment of a rights agent with respect to such rights.

  Section  6.2 No Action by  Written  Consent  of  Stockholders.  Subject to the
rights of the holders of any series of  Preferred  Stock or any other  series or
class of stock as set forth in Article IV of these Articles of  Organization  to
elect  additional  Directors  under  specific  circumstances  or to  consent  to
specific actions taken by the  Corporation,  any action required or permitted to
be taken by the  stockholders  of the  Corporation  must be  effected  at a duly
called annual or special  meeting of stockholders of the Corporation and may not
be effected by any consent in writing in lieu of a meeting of such stockholders.

  Section 6.3 Certain Business Combinations.

  6.3.1. Vote Required for Certain Business Combinations.

  (A) In addition to any affirmative vote required by the Massachusetts  General
Laws or by Section 6.3.2 below,  the affirmative vote of the holders of at least
eighty percent (80%) of the voting power of the then


                                      



outstanding shares ofcapital stock of the Corporation entitled to vote generally
in the election of Directors (the "Voting  Stock"),  voting together as a single
class, shall be required for any Business Combination (hereinafter defined).

  (B) "Business Combination" shall mean:

      (1) any  merger or  consolidation  of the  Corporation  or any  Subsidiary
    (hereinafter  defined)  with  (a) any  Interested  Stockholder  (hereinafter
    defined) or (b) any other  corporation  (whether or not itself an Interested
    Stockholder)  which is, or after such merger or  consolidation  would be, an
    Affiliate of an Interested Stockholder; or

      (2) any  sale,  lease,  exchange,  mortgage,  pledge,  transfer  or  other
    disposition (in one transaction or a series of  transactions) to or with any
    Interested Stockholder,  or any Affiliate of any Interested Stockholder,  of
    any assets of the  Corporation  or any  Subsidiary  having an aggregate Fair
    Market Value (as hereinafter defined) of $1,000,000 or more; or

      (3) the purchase,  exchange, lease or other acquisition by the Corporation
    or  any  Subsidiary  (in  a  single  transaction  or  a  series  of  related
    transactions) of all or  substantially  all of the assets or business of any
    Interested Stockholder or any Affiliate of any Interested Stockholder; or

      (4) the issuance or transfer by the  Corporation or any Subsidiary (in one
    transaction  or  a  series  of   transactions)  of  any  securities  of  the
    Corporation or any Subsidiary to any Interested Stockholder or any Affiliate
    of any  Interested  Stockholder  in exchange for cash,  securities  or other
    property (or a combination  thereof)  having an aggregate  Fair Market Value
    (as hereinafter  defined) of $1,000,000 or more,  except for any issuance or
    transfer  pursuant to an employee  benefit  plan of the  Corporation  or any
    Subsidiary thereof; or

      (5)  the  adoption  of  any  plan  or  proposal  for  the  liquidation  or
    dissolution  of the  Corporation  proposed by or on behalf of any Interested
    Stockholder or any Affiliate of any Interested Stockholder; or

      (6) any  reclassification  of  securities  (including  any  reverse  stock
    split),  or   recapitalization   of  the  Corporation,   or  any  merger  or
    consolidation  of the Corporation  with any of its Subsidiaries or any other
    transaction  (whether  or  not  with  or  into  or  otherwise  involving  an
    Interested  Stockholder)  which has the effect,  directly or indirectly,  of
    increasing the proportionate share of the outstanding shares of any class of
    equity or convertible  securities of the Corporation or any Subsidiary which
    is  directly  or  indirectly  owned  by any  Interested  Stockholder  or any
    Affiliate of any Interested Stockholder.

  6.3.2. When Higher Vote is Not Required.

  Section  6.3.1  above  shall  not be  applicable  to any  particular  Business
Combination,  and such Business  Combination  shall require only the affirmative
vote of the majority of the outstanding  shares of Voting Stock, if, in the case
of  any  Business   Combination   that  does  not  involve  any  cash  or  other
consideration  being received by the  stockholders of the Corporation  solely in
their capacity as stockholders of the  Corporation,  the condition  specified in
the  following  paragraph A of this Section  6.3.2 is met or, in the case of any
other  Business  Combination,  the  condition(s)  specified  in  either  of  the
following paragraph A or paragraph B of this Section 6.3.2 is met:

  (A) Approval by Continuing Directors. The Business Combination shall have been
approved by a majority of the Continuing Directors  (hereinafter  defined) and a
majority of the Board of Directors.

  (B) Price and Procedure Requirements. All of the following conditions shall
have been met:

  (1) The aggregate  amount of the cash and the Fair Market Value as of the date
of the consummation of the Business Combination of consideration other than cash
to be  received  per  share by the  holders  of  common  stock in such  Business
Combination shall at least be equal to the higher of the following:

  (a) (if  applicable)  the  Highest  Per  Share  Price  (hereinafter  defined),
including any brokerage  commissions,  transfer  taxes and  soliciting  dealers'
fees, paid by the Interested Stockholder or any 


                                     



of its  Affiliates  for any shares of common stock acquired by it (x) within the
two-year  period  immediately  prior to the  first  public  announcement  of the
proposal of the Business  Combination (the  "Announcement  Date"), or (y) in the
transaction in which it became an Interested  Stockholder,  whichever is higher;
and

  (b) the highest Fair Market Value per share of common stock on any date during
the one-year period prior to and including the Announcement Date; and

  (c) (if  applicable)  the price per share equal to the product of (i) the Fair
Market Value per share of common stock on the  Announcement  Date or on the date
on which the Interested Stockholder became an Interested Stockholder (such later
date is referred to in this Section 6.3 as the "Determination Date"),  whichever
is higher,  multiplied  by (ii) a fraction,  (x) the  numerator  of which is the
Highest Per Share Price (including any brokerage commissions, transfer taxes and
soliciting  dealers fees) paid by the Interested  Stockholder  for any shares of
common stock acquired by it within the two-year period  immediately prior to and
including the  Announcement  Date, and (y) the  denominator of which is the Fair
Market Value per share of common stock on the first day in such two-year  period
upon which the Interested Stockholder acquired any shares of common stock.

  (2) The aggregate  amount of the cash and the Fair Market Value as of the date
of the consummation of the Business Combination of consideration other than cash
to be received per share by holders of shares of any class of outstanding Voting
Stock  other than  common  stock  shall be at least  equal to the highest of the
following (it being intended that the  requirements of this paragraph B(2) shall
be required  to be met with  respect to every such class of  outstanding  Voting
Stock,  whether or not the Interested  Stockholder  has previously  acquired any
shares of a particular class of Voting Stock):

  (a) (if  applicable)  the  Highest Per Share Price  (including  any  brokerage
commissions, transfer taxes and soliciting dealers' fees) paid by the Interested
Stockholder  for any shares of such  class of Voting  Stock  acquired  by it (x)
within the two-year period immediately prior to the Announcement Date, or (y) in
the  transaction  in which it became an  Interested  Stockholder,  whichever  is
higher;

  (b) (if  applicable)  the highest  preferential  amount per share to which the
holders of shares of such class of Voting Stock are entitled in the event of any
voluntary  or  involuntary  liquidation,   dissolution  or  winding  up  of  the
Corporation; and

  (c) the highest  Fair Market  Value per share of such class of Voting Stock on
any date during the one-year  period  prior to and  including  the  Announcement
Date; and

  (d) (if  applicable)  the price per share equal to the product of (i) the Fair
Market Value per share of such class of Voting Stock on the Announcement Date or
on the Determination Date,  whichever is higher,  multiplied by (ii) a fraction,
(x) the  numerator  of which is the  Highest  Per  Share  Price  (including  any
brokerage  commissions,  transfer taxes and soliciting dealers fees) paid by the
Interested  Stockholder for any shares of such class of Voting Stock acquired by
it  within  the  two-year  period   immediately   prior  to  and  including  the
Announcement Date, and (y) the denominator of which is the Fair Market Value per
share of such  class of Voting  Stock on the first day in such  two-year  period
upon  which the  Interested  Stockholder  acquired  any  shares of such class of
Voting Stock.

  (3) The  consideration  to be  received  by holders of a  particular  class of
  outstanding  Voting Stock (including  common stock) shall be in cash or in the
same form as the Interested  Stockholder  has previously paid for shares of such
class of Voting Stock. If the Interested  Stockholder has paid for shares of any
class  of  Voting  Stock  with  varying  forms  of  consideration,  the  form of
consideration  to be  received  per share by  holders of shares of such class of
Voting Stock shall be either cash or the form used to acquire the largest number
of shares of such class of Voting Stock  previously  acquired by the  Interested
Stockholder.  The price  determined in accordance with this paragraph B(3) shall
be 
                                      




subject to  appropriate  adjustment  in the event of any stock  dividend,  stock
split, combination of shares or similar event.

  (4) After such Interested Stockholder has become an Interested Stockholder and
prior to the consummation of such Business  Combination:  (i) except as approved
by a majority of the Continuing  Directors,  there shall have been no failure to
declare  and pay at the  regular  date  therefor  any full  quarterly  dividends
(whether or not  cumulative) on any  outstanding  stock having  preference  over
common stock as to dividends or  liquidation,  (ii) there shall have been (x) no
reduction  in the  annual  rate of  dividends  paid on common  stock  (except as
necessary to reflect any  subdivision of common stock),  except as approved by a
majority of the Continuing Directors, and (y) an increase in such annual rate of
dividends as necessary to reflect any  reclassification  (including  any reverse
stock split),  reorganization or any similar transaction which has the effect of
reducing the number of outstanding shares of common stock, unless the failure to
so  increase  such  annual  rate is  approved  by a majority  of the  Continuing
Directors,  and  (iii)  neither  such  Interested  Stockholder  nor  any  of its
Affiliates  shall have beneficial  ownership of any additional  shares of Voting
Stock  except  as part  of the  transaction  which  results  in such  Interested
Stockholder becoming an Interested Stockholder.

  (5) After such Interested  Stockholder  has become an Interested  Stockholder,
such  Interested  Stockholder  shall not have received the benefit,  directly or
indirectly (except  proportionately as a stockholder),  of any loans,  advances,
guarantees,  pledges or other  financial  assistance or any tax credits or other
tax  advantages  provided,  directly or  indirectly,  by the  Corporation or any
Subsidiary,  whether in  anticipation  of or in  connection  with such  Business
Combination or otherwise.

  (6)  A  proxy  or  information  statement  describing  the  proposed  Business
Combination and complying with the  requirements of the Securities  Exchange Act
of 1934, as amended (the "Exchange Act"), and rules and regulations  promulgated
thereunder,  shall be mailed to stockholders of the Corporation at least 30 days
prior to the  consummation  of such  Business  Combination  (whether or not such
proxy or information statement is required to be mailed pursuant to the Exchange
Act or such rules and regulations).

  6.3.3. Certain Definitions.

  For the purposes of these Articles of Organization:

  (A) A "Person"  shall  include an  individual,  a group  acting in concert,  a
corporation,  a partnership,  an association or other entity, a joint venture, a
pool, a joint stock company, a trust, an unincorporated  organization or similar
company,  a syndicate  or any other group  formed for the purpose of  acquiring,
holding or disposing of securities.

  (B) "Interested Stockholder" shall mean any Person (other than the Corporation
or Subsidiary thereof) that:

  (1) is the beneficial owner, directly or indirectly,  of more than 4.9% of the
outstanding  Voting Stock for the 3 year period from and after  February 9, 1995
or of more than 10% of the outstanding Voting Stock thereafter; or

  (2) is an  Affiliate  of the  Corporation  and at any time within the two-year
period  immediately  prior to the date in  question  was the  beneficial  owner,
directly or indirectly,  of 4.9% or more of the outstanding Voting Stock for the
3 year  period  from  and  after  February  9,  1995  or of 10% or  more  of the
outstanding Voting Stock thereafter; or

  (3) is an assignee of or has otherwise succeeded to any shares of Voting Stock
which were at any time within the two-year period  immediately prior to the date
in question beneficially owned by any Interested Stockholder, if such assignment
or succession  shall have  occurred in the course of a transaction  or series of
transactions  not  involving  a  public  offering  within  the  meaning  of  the
Securities  Act of 1933, as amended,  and such  assignment or succession was not
approved by a majority of the Continuing Directors.

                                      



  (C) "Affiliate" or "Associate" shall have the respective  meanings ascribed to
such terms in Rule 12b-2 of the General Rules and Regulations under the Exchange
Act (the "SEC Rules").

  (D) "Beneficial  ownership" shall be determined  pursuant to Rule 13d-3 of the
SEC Rules; provided, however, that, a Person shall, in any event, also be deemed
the beneficial owner of any Voting Stock:

  (1) which such Person or any of its Affiliates or Associates, directly or
indirectly, beneficially owns; or

  (2) which such  Person or any of its  Affiliates  or  Associates,  directly or
indirectly,  has (A) the right to acquire  (whether  such  right is  exercisable
immediately  or only after the  passage  of time),  pursuant  to any  agreement,
arrangement or understanding (but shall not be deemed to be the beneficial owner
of  any  Voting  Stock  solely  by  reason  of  an  agreement,   arrangement  or
understanding  with the Corporation to effect any transaction which is described
in any one or more of the  subparagraphs of paragraph A of Section 6.3.1 above),
or upon the exercise of conversion rights, exchange rights, warrants, or options
or  otherwise,  or (B) sole or shared  voting or  investment  power with respect
thereto pursuant to any agreement, arrangement,  understanding,  relationship or
otherwise  (but  shall not be deemed to be the  beneficial  owner of any  voting
shares solely by reason of a revocable proxy granted for a particular meeting of
stockholders,  pursuant to a public  solicitation  of proxies for such  meeting,
with respect to shares of which  neither  such Person nor any such  Affiliate or
Associate is otherwise deemed the beneficial owner); or

  (3) which is beneficially owned,  directly or indirectly,  by any partnership,
limited partnership, syndicate or other group in which such Person or any of its
Affiliates or Associates participates pursuant to any agreement,  arrangement or
understanding for the purpose of acquiring,  holding, voting or disposing of any
shares of Voting Stock of the Corporation;

provided  further,  however,  that (1) no Director or officer of the Corporation
(or any Affiliate or Associate of any such Director or officer) shall, solely by
reason of any or all of such Directors or officers acting in their capacities as
such,  be  deemed,  for any  purposes  of these  Articles  of  Organization,  to
beneficially own any Voting Stock  beneficially owned by any other such Director
or  officer  (or any  Affiliate  or  Associate  thereof),  and (2)  neither  any
tax-qualified  employee  benefit plan of the Corporation or any Subsidiary,  nor
any trustee with respect  thereto or any  Affiliate or Associate of such trustee
(solely by reason of such capacity of such  trustee),  shall be deemed,  for any
purposes of these Articles of Organization, to beneficially own any Voting Stock
held under any such plan.

  (E) For purposes of determining whether a Person is an Interested  Stockholder
pursuant to  paragraph B of this Section  6.3.3,  the number of shares of Voting
Stock deemed to be outstanding  shall include shares deemed owned by such Person
through  application of paragraph D of this Section 6.3.3, but shall not include
any other  shares of Voting  Stock  which  may be  issuable  by the  Corporation
pursuant to any  agreement,  arrangement or  understanding,  or upon exercise of
conversion rights, warrants or options or otherwise.

  (F) "Subsidiary" shall mean any corporation (including without limitation, any
banking  or  thrift  institution)  of which a  majority  of any  class of equity
security  is  owned,  directly  or  indirectly,  by the  Corporation;  provided,
however,  that for the purposes of the definition of Interested  Stockholder set
forth in paragraph (B) of this Section 6.3.3, the term  "Subsidiary"  shall mean
only a  corporation  of which a  majority  of each class of equity  security  is
owned, directly or indirectly, by the Corporation.

  (G) "Continuing  Director" shall mean any member of the Board of Directors who
is not an Affiliate or Associate of the Interested  Stockholder and was a member
of the  Board of  Directors  prior to the time that the  Interested  Stockholder
became an Interested  Stockholder,  and any Director who is thereafter chosen to
fill any vacancy of the Board of  Directors or who is elected and who, in either
event,  is not an Affiliate or Associate of the  Interested  Stockholder  and in
connection  with his or her  initial  assumption  of office is  recommended  for
appointment or election by a majority of Continuing  Directors then on the Board
of Directors.
                                      




  (H) "Fair Market Value" shall mean:

  (1) in the case of stock,  the highest closing sales price of the stock during
the 30 calendar day-period immediately preceding the date in question of a share
of such  stock on the  National  Association  of  Securities  Dealers  Automated
Quotation  System or any system  then in use,  or, if such stock is  admitted to
trading on a principal United States  securities  exchange  registered under the
Exchange Act, Fair Market Value shall be the highest sale price reported  during
the 30  calendar  day-period  preceding  the date in  question,  or,  if no such
quotations  are  available,  the Fair Market  Value on the date in question of a
share of such stock as  determined  by the Board of Directors in good faith,  in
each case with  respect to any class of stock,  appropriately  adjusted  for any
dividend  or  distribution  in  shares  of  such  stock  or any  combination  or
reclassification  of  outstanding  shares of such stock into a smaller number of
shares of such stock; and

  (2) in the case of property other than cash or stock, the Fair Market Value of
such property on the date in question as determined by the Board of Directors in
good faith.

  (I)  Reference to "Highest Per Share Price" shall in each case with respect to
any  class of stock  reflect  an  appropriate  adjustment  for any  dividend  or
distribution  in  shares  of stock or any  stock  split or  reclassification  of
outstanding  shares of such stock into a greater  number of shares of such stock
or any combination or  reclassification of outstanding shares of such stock into
a smaller number of shares of such stock.

  6.3.4. Powers of the Board of Directors.

  A majority of the Directors of the Corporation  (or, if there is an Interested
Stockholder,  a majority of the Continuing  Directors then in office) shall have
the power to  determine  for the  purposes  of this  Section 6.3 on the basis of
information known to them after reasonable  inquiry,  (A) whether a Person is an
Interested Stockholder,  (B) the number or percentage of any class of securities
beneficially  owned by any  Person,  (C)  whether  a Person is an  Affiliate  or
Associate of another,  (D) whether the  requirements of Section 6.3.2 above have
been met with respect to any Business Combination,  (E) whether the assets which
are the subject of any Business  Combination  have, or the  consideration  to be
received for the issuance or transfer of  securities by the  Corporation  or any
Subsidiary in any Business  Combination  has, an aggregate  Fair Market Value of
$1,000,000  or more and (F) any other  matters of  interpretation  arising under
this Section 6.3 or under Section 6.6 below.  The good faith  determination of a
majority of the Directors (or, if there is an Interested Stockholder, a majority
of the Continuing  Directors then in office) on such matters shall be conclusive
and binding for all  purposes  of this  Section 6.3 and of Section 6.6 below.  A
majority of the  Directors  of the  Corporation  (or, if there is an  Interested
Stockholder,  a majority of the Continuing  Directors then in office) shall have
the further power to interpret all the terms and  provisions of this Section 6.3
and of Section 6.6 below.

  6.3.5. No Effect on Fiduciary Obligations of Interested Stockholders.

  Nothing  contained  in this  Section  6.3 shall be  construed  to relieve  any
Interested Stockholder from any fiduciary obligation imposed by law.

  Section 6.4 Standards for Board of Directors'  Evaluation of Offers. The Board
of Directors of the Corporation, when evaluating any offer of another Person (as
defined in Section  6.3  above) to (A) make a tender or  exchange  offer for any
equity  security of the  Corporation,  (B) merge or consolidate  the Corporation
with  another   institution  or  (C)  purchase  or  otherwise   acquire  all  or
substantially  all of the properties and assets of the  Corporation,  shall,  in
connection with the exercise of its judgment in determining  what is in the best
interests of the Corporation and its stockholders, give due consideration to all
relevant factors including,  without limitation, the social and economic effects
of  acceptance  of such  offer on the  Corporation's  and/or  its  Subsidiaries'
present and future account holders,  borrowers and employees; on the communities
in which the Corporation and its Subsidiaries operate or are located; and on the
ability of the  Corporation to fulfill the objectives of a bank holding  company
under applicable statutes and regulations.

                                      



  Section  6.5  Pre-emptive  Rights.   Holders  of  the  capital  stock  of  the
Corporation  shall not be entitled  to  pre-emptive  rights with  respect to any
shares of the capital stock of the Corporation which may be issued.

  Section 6.6  Beneficial  Ownership  Limitation.  No person  shall  directly or
indirectly  offer to acquire or acquire  beneficial  ownership  (as that term is
defined in Section  6.3.3 above of more than 4.9% of the  outstanding  shares of
any class of equity  securities of the  Corporation  during the period up to and
through  February 6, 1998 or at any time  thereafter more than ten percent (10%)
of the outstanding  shares of any class of equity securities of the Corporation.
This  limitation  shall not apply (A) to any  acquisition  of shares of  capital
stock of the  Corporation  which has been  expressly  approved  in advance by an
affirmative  vote of not less than  two-thirds of the Board of Directors then in
office  (or,  if there shall be an  Interested  Stockholder  at the time of such
vote,  then  also by the  affirmative  vote of not less than  two-thirds  of the
Continuing Directors then in office) or (B) to any offer to the Corporation made
by the  underwriters  selected by the  Corporation  in connection  with a public
offering by the Corporation of the Corporation's capital stock.

  For the  purposes  of  determining  the number of shares of equity  securities
owned hereunder by any Person,  the number of shares of equity securities deemed
to be  outstanding  shall include shares deemed owned by such Person through the
application  of  paragraph  D of Section  6.3.3  above but shall not include any
other  shares of equity  securities  which may be  issuable  by the  Corporation
pursuant to any  agreement,  arrangement or  understanding,  or upon exercise of
conversion rights, warrants or options or otherwise.

  In the event that  beneficial  ownership of any class of equity  securities is
acquired in violation of this Section 6.6, (i) all shares of common or preferred
stock  beneficially  owned by any Person in excess of 4.9% or ten percent (10%),
as the case may be, of the  total  number of  outstanding  shares of such  class
shall not be  counted  as  shares  entitled  to vote,  shall not be voted by any
Person or counted as voting  shares in connection  with any matter  submitted to
the  stockholders  for a vote,  and  shall not be  counted  as  outstanding  for
purposes of  determining  the  affirmative  vote necessary to approve any matter
submitted to the  stockholders  for a vote,  and (ii) the Board of Directors may
cause all securities  beneficially  owned by any Person in excess of 4.9% or ten
percent (10%), as the case may be, of the total number of outstanding  shares of
such class of equity securities to be transferred to an independent  trustee for
sale to the  Corporation  or on the open  market at a price  which  shall be the
lesser of the purchase or the market  price.  The expenses of such trustee shall
be paid out of the  proceeds  from such sale.  The term  "offer" as used in this
Section 6.6 includes every offer to buy or acquire,  solicitation of an offer to
sell,  tender  offer for or request or  invitation  for tender of, a security or
interest in a security of value.

  Section 6.7 Directors. The Corporation shall be under the direction of a Board
of Directors.  The number of Directors shall not be fewer than three.  The Board
of Directors  shall be divided  into three  classes as nearly equal in number as
possible, with one class to be elected each year.

  The initial  directors of the  Corporation  shall hold office as follows:  the
directors  initially elected to Class I shall hold office for a term expiring at
the annual meeting of stockholders  to be held in 1997, the directors  initially
elected to Class II shall hold office for a term expiring at the annual  meeting
of stockholders to be held in 1998, and the directors initially elected to Class
III shall hold office for a term expiring at the annual meeting of  stockholders
to be held in 1999,  with the  members of each such class to hold  office  until
their  respective  successors  are duly  elected and  qualified.  At each annual
meeting, or special meeting in lieu thereof, of stockholders of the Corporation,
the successors to the class of directors whose term expires at the meeting shall
be  elected  to  hold  office  for a term  expiring  at the  annual  meeting  of
stockholders  held in the third year  following  the year of their  election and
until their respective successors are elected and qualified.

  Subject to the rights of the holders of any series of  Preferred  Stock or any
other series or class of stock as set forth in any certificate of  establishment
with respect thereto to elect additional Directors under specific circumstances,
any Director may be removed from office at any time, but only for cause and only
by the  affirmative  vote of the holders of at least eighty percent (80%) of the
voting power of the then outstanding  Voting Stock,  voting together as a single
class.  At least  thirty  days prior to such  meeting of  stockholders,  written
notice 

                                      



shall be sent to the Director  whose  removal will be considered at the meeting.
For  purposes of this  Section  6.7,  "cause"  shall be defined to mean only the
following: (i) conviction of a felony, (ii) declaration of unsound mind by order
of court,  (iii) gross  dereliction of duty, (iv) commission of an act involving
moral turpitude,  or (v) commission of an action which  constitutes  intentional
misconduct or a knowing  violation of law if such action in either event results
both in an improper  substantial  personal  benefit and a material injury to the
Corporation.

  Section 6.8 Directors'  Liability.  No Director shall be personally  liable to
the Corporation or its  stockholders for monetary damages for any breach of such
Director's  fiduciary duty as a Director,  notwithstanding  any provision of law
imposing such  liability;  provided,  however,  that, to the extent  required by
applicable  law, this provision  shall not eliminate the liability of a Director
(i) for any breach of such  Director's duty of loyalty to the Corporation or its
stockholders,  (ii) for acts or  omissions  not in good  faith or which  involve
intentional  misconduct or a knowing violation of law, (iii) under provisions of
the Massachusetts  General Laws imposing  liabilities on Directors in respect of
distributions  to the  stockholders  of the  Corporation or loans to officers or
Directors of the  Corporation,  or (iv) any transaction from which such Director
derived any improper  personal  benefit.  This provision shall not eliminate the
liability of a Director for any act or omission occurring prior to the date upon
which  this  provision  becomes  effective.  No  amendment  to or repeal of this
provision  shall  apply  to or have  any  effect  on the  liability  or  alleged
liability of any Director of the  Corporation for or with respect to any acts or
omissions  of such  Director  occurring  prior to the date of such  amendment or
repeal.

  Section 6.9 Transactions with Interested Persons.

  6.9.1.  Unless  entered into in bad faith or in violation of any  provision of
these Articles of  Organization,  no contract or transaction by the  Corporation
shall be void,  voidable or in any way affected by reason of the fact that it is
with an Interested Person.

  6.9.2.  For the purposes of this Section 6.9,  "Interested  Person"  means any
Person in any way interested in the Corporation whether as a director,  officer,
stockholder,  employee  or  otherwise,  and any  other  entity in which any such
Person is in any way interested.

  6.9.3. Unless such contract or transaction was entered into in bad faith or in
violation of any  provision of these  Articles of  Organization,  no  Interested
Person,  because of such interest,  shall be liable to the Corporation or to any
other  Person for any loss or expense  incurred  by reason of such  contract  or
transaction  or shall be accountable  for any gain or profit  realized from such
contract or transaction.

  6.9.4.  The provisions of this Section 6.9 shall be operative  notwithstanding
the fact that the presence of an Interested Person was necessary to constitute a
quorum at a meeting of Directors or  stockholders  of the  Corporation  at which
such contract or  transaction  was  authorized or that the vote of an Interested
Person was necessary for the authorization of such contract or transaction.

  Section 6.10 Acting as a Partner.  To the extent not  prohibited by applicable
law, the Corporation may be a partner in any business  enterprise which it would
have power to conduct by itself.

  Section 6.11  Stockholders  Meetings.  Meetings of stockholders may be held at
such place in the Commonwealth of  Massachusetts  or, if permitted by applicable
law, elsewhere in the United States as the Board of Directors may determine.

  Section 6.12 Call of Special  Meetings.  Special  meetings of the stockholders
for any purpose or purposes  may be called at any time only by the  President or
by the Board of Directors  pursuant to a resolution adopted by a majority of the
total  number of  Directors  that the  Corporation  would  have if there were no
vacancies (the "Whole Board"); provided, however, that if there is an Interested
Stockholder, any such call shall also require the affirmative vote of a majority
of the Continuing  Directors then in office. Only those matters set forth in the
call of the special  meeting  may be  considered  or acted upon at such  special
meeting, unless otherwise required by law.

                                      



  Section  6.13  Amendment  of  Bylaws.  The  Bylaws of the  Corporation  may be
adopted,  altered, amended, changed or repealed by the Board of Directors or the
stockholders  of the  Corporation.  Such action by the Board of Directors  shall
require the  affirmative  vote of at least a majority of the  Directors  then in
office at a duly  constituted  meeting of the Board of Directors,  unless at the
time of such action there shall be an Interested Stockholder, in which case such
action  shall also  require the  affirmative  vote of at least a majority of the
Continuing  Directors  then in  office,  at such a meeting.  Such  action by the
stockholders shall require (i) approval by the affirmative vote of a majority of
Directors  then in office,  unless at the time of such action  there shall be an
Interested  Stockholder,  in which  case such  action  shall  also  require  the
affirmative  vote of at least a majority  of the  Continuing  Directors  then in
office,  at such  meeting,  (ii)  unless  waived  by the  affirmative  vote of a
majority  of the  Directors  then in  office  (and,  if  applicable,  Continuing
Directors)   specified  in  the  preceding  sentence,   the  submission  by  the
stockholders of written proposals for adopting,  altering, amending, changing or
repealing  the Bylaws that comply in all  respects  with the  provisions  of the
Bylaws  governing such  submissions and (iii) the  affirmative  vote of at least
eighty  percent (80%) of the voting power of the then  outstanding  Voting Stock
voting together as a single class at a duly constituted  meeting of stockholders
called expressly for such purpose.

  Section 6.14 Amendment of Articles of  Organization.  No amendment,  addition,
alteration,  change or repeal of any Article of these  Articles of  Organization
shall be made,  unless the same is first approved by the  affirmative  vote of a
majority  of the Board of  Directors  of the  Corporation  then in  office,  and
thereafter  approved by the affirmative  vote of  stockholders  holding not less
than eighty  percent  (80%) of the voting power of the then  outstanding  Voting
Stock voting together as a single class cast at a duly constituted  meeting, or,
in the case of  Articles I, II and III hereof by not less than a majority of the
voting power of the then  outstanding  Voting Stock voting  together as a single
class cast at a duly constituted  meeting;  provided,  however,  that if, at any
time within the sixty day period immediately  preceding the meeting at which the
stockholder  vote is to be  taken,  there  is an  Interested  Stockholder,  such
amendment,  addition,  alteration,  change  or repeal  shall  also  require  the
affirmative vote of not less than a majority of the Continuing Directors then in
office, prior to approval by the stockholders. Unless otherwise provided by law,
any  amendment,  addition,  alteration,  change or repeal so acted upon shall be
effective  on  the  date  it is  filed  with  the  Secretary  of  State  of  the
Commonwealth  of  Massachusetts  or on  such  other  date as  specified  in such
amendment,  addition,  alteration, change or repeal or as the Secretary of State
may specify.

  Section 6.15 Reduced Shareholder Vote Approval for Certain  Transactions.  The
Corporation  may,  by an  affirmative  vote of the  holders of a majority of the
voting power of the then  outstanding  Voting Stock voting  together as a single
class  cast at a duly  constituted  meeting,  authorize  any (i) sale,  lease or
exchange  of all  or  substantially  all  of  its  assets  (a  "Sale")  or  (ii)
consolidation or merger of the Corporation with or into any other corporation (a
"Merger",  and together  with a Sale,  a  "Transaction")  that would  otherwise,
pursuant to Chapter 156B of the  Massachusetts  General  Laws,  have required an
affirmative  vote of the holders of  two-thirds  of the voting power of the then
outstanding  Voting  Stock  voting  together  as a single  class  cast at a duly
constituted meeting; provided however, that such Transaction has previously been
approved  by a vote of at least a  majority  of the Board of  Directors  then in
office  (and,  if at the  time of  such  action  there  shall  be an  Interested
Stockholder,  an  additional  vote of at  least  a  majority  of the  Continuing
Directors  then in  office).  This  Section  6.15 is  intended  to  apply to any
Transaction that would not otherwise  constitute a Business  Combination that is
subject to the provisions of Section 6.3 above.

                                     






                                   ARTICLE VII

The effective date of organization of the corporation shall be the date approved
and filed by the Secretary of the  Commonwealth.  If a later  effective  date is
desired,  specify  such date which shall not be more than thirty days after that
date of filing.


                                  ARTICLE VIII

The  information  contained  in  Article  VIII  is not a  permanent  part of the
Articles of Organization.

a.   The street address (post office boxes are not  acceptable) of the principal
     office of the corporation in Massachusetts is:

         1441 Main Street, Springfield, Massachusetts 01102-3034

b.   The name,  residential address and post office address of each director and
     officer of the corporation is as follows:




                  Name                               Residential Address             Post Office Address
                                                                             

President:        F. William Marshall, Jr.           87 Ely Road                     SIS Bancorp, Inc.
                                                     Longmeadow, MA 01106            1441 Main Street
                                                                                     Springfield, MA 01102-3034
Treasurer:        John F. Treanor                    10 Dutton Circle                         "
                                                     Medford, MA 02155

Clerk:            Michael E. Tucker                  26 Lawler Drive                          "
                                                     Easthampton, MA 01027

Directors:        John M. Naughton                   75 Churchill Drive                       "
                                                     Longmeadow, MA 01106

                  F. William Marshall, Jr.           See Above                                "

                  John F. Treanor                    See Above                                "



c.   The fiscal year (i.e.,  tax year) of the corporation  shall end on the last
     day of the month of: December

d.   The name  and  business  address  of the  resident  agent,  if any,  of the
     corporation is: N/A



                                   ARTICLE IX

By-laws of the corporation have been duly adopted and the president,  treasurer,
clerk and directors whose names are set forth above, have been duly elected.

IN  WITNESS  WHEREOF  AND UNDER THE PAINS AND  PENALTIES  OF  PERJURY,  I, whose
signature  appear  below as  incorporator  and whose  name and  business  or
residential  address  are clearly typed or printed beneath each signature do
hereby  associate  with the  intention  of forming  this  corporation  under the
provisions  of General Laws,  Chapter 156B and do hereby sign these  Articles of
Organization as incorporator this 18th day of January, 1996.

/s/ Stephen J. Coukos
Stephen J. Coukos, Esq.
SULLIVAN & WORCESTER
One Post Office Square
Boston, MA 02109



                                      






                        THE COMMONWEALTH OF MASSACHUSETTS

                            ARTICLES OF ORGANIZATION
                          (General Laws, Chapter 156B)



I hereby certify that, upon examination of these Articles of Organization,  duly
submitted to me, it appears that the  provisions of the General Laws relative to
the  organization of corporations  have been complied with, and I hereby approve
said articles;  and the filing fee in the amount of $300 having been paid,  said
articles are deemed to have been filed with me this 18th day of January 1996.



                Effective date:_________________________________


                           /s/ William Francis Galvin
                             WILLIAM FRANCIS GALVIN
                          Secretary of the Commonwealth



FILING FEE: One tenth of one percent of the total authorized  capital stock, but
not less than  $200.00.  For the  purpose of filing,  shares of stock with a par
value less than $1.00,  or no par stock,  shall be deemed to have a par value of
$1.00 per share.



                         TO BE FILLED IN BY CORPORATION
                      Photocopy of document to be sent to:

                             Stephen J. Coukos, Esq.
                              SULLIVAN & WORCESTER
                             One Post Office Square
                                Boston, MA 02109

                             Telephone: 617-338-2912



                                      






                        [FORM OF ARTICLES OF AMENDMENT TO
                        BE FILED PRIOR TO REORGANIZATION]


                        THE COMMONWEALTH OF MASSACHUSETTS


                 OFFICE OF THE MASSACHUSETTS SECRETARY OF STATE
                         MICHAEL J. CONNOLLY, Secretary
                ONE ASHBURTON PLACE, BOSTON, MASSACHUSETTS 02108

                              ARTICLES OF AMENDMENT
                     General Laws, Chapter 156B, Section 72



We, F. William Marshall, Jr., President, and Michael E. Tucker, Clerk, of

                                SIS Bancorp, Inc.
                           (EXACT Name of Corporation)

located at:  1441 Main Street, Springfield, Massachusetts 01102
                   (MASSACHUSETTS Address of Corporation)

do hereby certify that these ARTICLES OF AMENDMENT  affecting 
Articles NUMBERED:  3
   (Number  those  articles  1, 2, 3, 4, 5  and/or  6 being amended hereby)

of the  Articles  of  Organization  were  duly  adopted  at a  meeting  held  on
__________ 1996, by vote of: the sole incorporator in accordance with the rights
and powers accorded thereto under Ch. 156B M.G.L. ss.44.



                                     






To CHANGE the number of shares and the par value (if any) of any type,  class or
series of stock  which  the  corporation  is  authorized  to issue,  fill in the
following:

The total presently authorized is:


    WITHOUT PAR VALUE STOCKS                        WITH PAR VALUE STOCK
- ------------------------------      -------------------------------------------
TYPE          NUMBER OF SHARES      TYPE        NUMBER OF SHARES      PAR VALUE
- ----          ----------------      ----        ----------------      ---------
COMMON:                             COMMON:          250,000             $0.01
PREFERRED:                          PREFERRED:        50,000             $0.01


CHANGE the total authorized to:

    WITHOUT PAR VALUE STOCKS                        WITH PAR VALUE STOCK
- ------------------------------      -------------------------------------------
TYPE          NUMBER OF SHARES      TYPE        NUMBER OF SHARES      PAR VALUE
- ----          ----------------      ----        ----------------      ---------
COMMON:                             COMMON:          25,000,000          $0.01
PREFERRED:                          PREFERRED:        5,000,000          $0.01



                                     






                                    








The foregoing  amendment will become  effective when these articles of amendment
are filed in accordance with Chapter 156B,  Section 6 of The General Laws unless
these articles  specify,  in accordance with the vote adopting the amendment,  a
later effective date not more than thirty days after such filing, in which event
the  amendment  will  become  effective  on such  later  date.  LATER  EFFECTIVE
DATE:__________


IN WITNESS  WHEREOF AND UNDER THE PENALTIES OF PERJURY,  we have hereunto signed
our names this day of , in the year 1996.

______________________________________________President
F. William Marshall, Jr.

______________________________________________ Clerk
Michael E. Tucker


                                     






                        THE COMMONWEALTH OF MASSACHUSETTS

                              ARTICLES OF AMENDMENT
                     GENERAL LAWS, CHAPTER 156B, SECTION 72



             I hereby approve the within articles of amendment and,
               the filing fee in the amount of $ having been paid,
                           said articles are deemed to
                     have been filed with me this day of 19






                               MICHAEL J. CONNOLLY
                               Secretary of State





                         TO BE FILLED IN BY CORPORATION
                  PHOTOCOPY OF ARTICLES OF AMENDMENT TO BE SENT

                           To: Stephen J. Coukos, Esq.
                            SULLIVAN & WORCESTER LLP
                             One Post Office Square
                                Boston, MA 02109

                             Telephone: 617-338-2912