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                                                                     EXHIBIT 3.1





                        THE COMMONWEALTH OF MASSACHUSETTS
                             WILLIAM FRANCIS GALVIN
                          SECRETARY OF THE COMMONWEALTH
                     ONE ASHBURTON PLACE, BOSTON, MASS 02108

                                                          FEDERAL IDENTIFICATION
                                                          NO. 04-3024165 
                                                              ----------

                  CERTIFICATE OF VOTE OF DIRECTORS ESTABLISHING
                          A SERIES OF A CLASS OF STOCK


                     General Laws, Chapter 156B, Section 26








         We, John R. Putney, President, and Susan G. Oullette, Clerk, of Warren
Bancorp, Inc. located at 10 Main Street, Peabody, MA 01960 do hereby certify
that at a meeting of the directors of the corporation held on April 21, 1999,
the following vote establishing and designating a series of a class of stock and
determining the relative rights and preferences thereof was duly adopted:


                                 (See Exhibit A)





NOTE:    Votes for which the space provided above is not sufficient should be
         set out on continuation sheets to be numbered 2A, 2B, etc. Continuation
         sheets must have a left-hand margin 1 inch wide for fining and shall be
         8 1/2" x 11". OnlY one side should be used.



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                                                                       Exhibit A
                                                                       ---------


                         VOTE OF DIRECTORS ESTABLISHING
                    SERIES B JUNIOR PARTICIPATING CUMULATIVE
                                 PREFERRED STOCK

                                       of

                              WARREN BANCORP, INC.

         Pursuant to Section 26 of Chapter 156B of the General Laws of The
Commonwealth of Massachusetts:

         VOTED, that pursuant to authority conferred upon and vested in the
Board of Directors by the Articles of Organization, as amended (the "Articles"),
of Warren Bancorp, Inc. (the "Corporation"), the Board of Directors hereby
establishes and designates a series of Preferred Stock of the Corporation, and
hereby fixes and determines the relative rights and preferences of the shares of
such series, in addition to those set forth in the Articles, as follows:

         Section 1. DESIGNATION AND AMOUNT. The shares of such series shall be
designated as "Series B Junior Participating Cumulative Preferred Stock" (the
"Series B Preferred Stock"), and the number of shares initially constituting
such series shall be 125,000.

         Section 2. DIVIDENDS AND DISTRIBUTIONS.

         (A)      (i) Subject to the rights of the holders of any shares of any
series of preferred stock (or any similar stock) ranking prior and superior to
the Series B Preferred Stock with respect to dividends, the holders of shares of
Series B Preferred Stock, in preference to the holders of shares of common stock
and of any other junior stock, shall be entitled to receive, when, as and if
declared by the Board of Directors out of funds legally available for the
purpose, quarterly dividends payable in cash on the first day of March, June,
September and December in each year (each such date being referred to herein as
a "Quarterly Dividend Payment Date"), commencing on the first Quarterly Dividend
Payment Date after the first issuance of a share or fraction of a share of
Series B Preferred Stock, in an amount per share (rounded to the nearest cent)
equal to the greater of (a) $1.00 or (b) subject to the provisions for
adjustment hereinafter set forth, 1,000 times the aggregate per share amount of
all cash dividends, and 1,000 times the aggregate per share amount (payable in
kind) of all non-cash dividends or other distributions other than a dividend
payable in shares of common stock or a subdivision of the outstanding shares of
common stock (by reclassification or otherwise), declared on the common stock
since the immediately preceding Quarterly Dividend Payment Date, or, with
respect to the first Quarterly Dividend Payment Date, since the first issuance
of any share or fraction of a share of Series B Preferred Stock. The multiple of
cash and non-cash dividends declared on the common stock to which holders of the
Series B Preferred Stock are entitled, which shall be 1,000 initially but which
shall be adjusted from time to time as hereinafter provided, is hereinafter
referred to as the "Dividend




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Multiple." In the event the Corporation shall at any time after April 21, 1999
(the "Rights Declaration Date") (i) declare or pay any dividend on common stock
payable in shares of common stock, or (ii) effect a subdivision or combination
or consolidation of the outstanding shares of common stock (by reclassification
or otherwise than by payment of a dividend in shares of common stock) into a
greater or lesser number of shares of common stock, then in each such case the
Dividend Multiple thereafter applicable to the determination of the amount of
dividends which holders of shares of Series B Preferred Stock shall be entitled
to receive shall be the Dividend Multiple applicable immediately prior to such
event multiplied by a fraction, the numerator of which is the number of shares
of common stock outstanding immediately after such event and the denominator of
which is the number of shares of common stock that were outstanding immediately
prior to such event.

                  (ii) Notwithstanding anything else contained in this paragraph
(A), the Corporation shall, out of funds legally available for that purpose,
declare a dividend or distribution on the Series B Preferred Stock as provided
in this paragraph (A) immediately after it declares a dividend or distribution
on the common stock (other than a dividend payable in shares of common stock);
provided that, in the event no dividend or distribution shall have been declared
on the common stock during the period between any Quarterly Dividend Payment
Date and the next subsequent Quarterly Dividend Payment Date, a dividend of
$1.00 per share on the Series B Preferred Stock shall nevertheless be payable on
such subsequent Quarterly Dividend Payment Date.

         (B)      Dividends shall begin to accrue and be cumulative on
outstanding shares of Series B Preferred Stock from the Quarterly Dividend
Payment Date next preceding the date of issue of such shares of Series B
Preferred Stock, unless the date of issue of such shares is prior to the record
date for the first Quarterly Dividend Payment Date, in which case dividends on
such shares shall begin to accrue from the date of issue of such shares, or
unless the date of issue is a Quarterly Dividend Payment Date or is a date after
the record date for the determination of holders of shares of Series B Preferred
Stock entitled to receive a quarterly dividend and before such Quarterly
Dividend Payment Date, in either of which events such dividends shall begin to
accrue and be cumulative from such Quarterly Dividend Payment Date. Accrued but
unpaid dividends shall not bear interest. Dividends paid on the shares of Series
B Preferred Stock in an amount less than the total amount of such dividends at
the time accrued and payable on such shares shall be allocated pro rata on a
share-by-share basis among all such shares at the time outstanding. The Board of
Directors may fix in accordance with applicable law a record date for the
determination of holders of shares of Series B Preferred Stock entitled to
receive payment of a dividend or distribution declared thereon, which record
date shall be not more than such number of days prior to the date fixed for the
payment thereof as may be allowed by applicable law.

         Section 3. VOTING RIGHTS. In addition to any other voting rights
required by law, the holders of shares of Series B Preferred Stock shall have
the following voting rights:

         (A)      Subject to the provision for adjustment hereinafter set forth,
each share of Series B Preferred Stock shall entitle the holder thereof to 1,000
votes on all matters submitted to a vote of the shareholders of the Corporation.
The number of votes which a holder of a share of Series

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B Preferred Stock is entitled to cast, which shall initially be 1,000 but which
may be adjusted from time to time as hereinafter provided, is hereinafter
referred to as the "Vote Multiple." In the event the Corporation shall at any
time after the Rights Declaration Date (i) declare or pay any dividend on common
stock payable in shares of common stock, or (ii) effect a subdivision or
combination or consolidation of the outstanding shares of common stock (by
reclassification or otherwise than by payment of a dividend in shares of common
stock) into a greater or lesser number of shares of common stock, then in each
such case the Vote Multiple thereafter applicable to the determination of the
number of votes per share to which holders of shares of Series B Preferred Stock
shall be entitled shall be the Vote Multiple immediately prior to such event
multiplied by a fraction, the numerator of which is the number of shares of
common stock outstanding immediately after such event and the denominator of
which is the number of shares of common stock that were outstanding immediately
prior to such event.

         (B)      Except as otherwise provided herein or by law, the holders of
shares of Series B Preferred Stock and the holders of shares of common stock and
the holders of shares of any other capital stock of this Corporation having
general voting rights, shall vote together as one class on all matters submitted
to a vote of shareholders of the Corporation.

         (C)      Except as otherwise required by applicable law or as set forth
herein, holders of Series B Preferred Stock shall have no special voting rights
and their consent shall not be required (except to the extent they are entitled
to vote with holders of common stock as set forth herein) for taking any
corporate action.

         Section 4. CERTAIN RESTRICTIONS.

         (A)      Whenever dividends or distributions payable on the Series B
Preferred Stock as provided in Section 2 are in arrears, thereafter and until
all accrued and unpaid dividends and distributions, whether or not declared, on
shares of Series B Preferred Stock outstanding shall have been paid in full, the
Corporation shall not:

         (i)      declare or pay dividends on, make any other distributions on,
                  or redeem or purchase or otherwise acquire for consideration
                  any shares of stock ranking junior (either as to dividends or
                  upon liquidation, dissolution or winding up) to the Series B
                  Preferred Stock;

         (ii)     declare or pay dividends on or make any other distributions on
                  any shares of stock ranking on a parity (either as to
                  dividends or upon liquidation, dissolution or winding up) with
                  the Series B Preferred Stock, except dividends paid ratably on
                  the Series B Preferred Stock and all such parity stock on
                  which dividends are payable or in arrears in proportion to the
                  total amounts to which the holders of all such shares are then
                  entitled;

         (iii)    except as permitted in subsection 4(A)(iv) below, redeem,
                  purchase or otherwise acquire for consideration shares of any
                  stock ranking on a parity

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                  (either as to dividends or upon liquidation, dissolution or
                  winding up) with the Series B Preferred Stock, provided that
                  the Corporation may at any time redeem, purchase or otherwise
                  acquire shares of any such parity stock in exchange for shares
                  of any stock of the Corporation ranking junior (either as to
                  dividends or upon dissolution, liquidation or winding up) to
                  the Series B Preferred Stock; or

         (iv)     purchase or otherwise acquire for consideration any shares of
                  Series B Preferred Stock, or any shares of any stock ranking
                  on a parity (either as to dividends or upon liquidation,
                  dissolution or winding up) with the Series B Preferred Stock,
                  except in accordance with a purchase offer made in writing or
                  by publication (as determined by the Board of Directors) to
                  all holders of such shares upon such terms as the Board of
                  Directors, after consideration of the respective annual
                  dividend rates and other relative rights and preferences of
                  the respective series and classes, shall determine in good
                  faith will result in fair and equitable treatment among the
                  respective series or classes.

         (B)      The Corporation shall not permit any subsidiary of the
Corporation to purchase or otherwise acquire for consideration any shares of
stock of the Corporation unless the Corporation could, under subsection (A) of
this Section 4, purchase or otherwise acquire such shares at such time and in
such manner.

         Section 5. REACQUIRED SHARES. Any shares of Series B Preferred Stock
purchased or otherwise acquired by the Corporation in any manner whatsoever
shall be retired and canceled promptly after the acquisition thereof. All such
shares shall upon their cancellation become authorized but unissued shares of
preferred stock and may be reissued as part of a new series of preferred stock
to be created by resolution or resolutions of the Board of Directors, subject to
the conditions and restrictions on issuance set forth herein.

         Section 6. LIQUIDATION, DISSOLUTION OR WINDING UP. Upon any liquidation
(voluntary or otherwise), dissolution or winding up of the Corporation, no
distribution shall be made (x) to the holders of shares of stock ranking junior
(either as to dividends or upon liquidation, dissolution or winding up) to the
Series B Preferred Stock unless, prior thereto, the holders of shares of Series
B Preferred Stock shall have received an amount equal to accrued and unpaid
dividends and distributions thereon, whether or not declared, to the date of
such payment, plus an amount equal to the greater of (1) $1,000.00 per share or
(2) an aggregate amount per share, subject to the provision for adjustment
hereinafter set forth, equal to 1,000 times the aggregate amount to be
distributed per share to holders of common stock, or (y) to the holders of stock
ranking on a parity (either as to dividends or upon liquidation, dissolution or
winding up) with the Series B Preferred Stock, except distributions made ratably
on the Series B Preferred Stock and all other such parity stock in proportion to
the total amounts to which the holders of all such shares are entitled upon such
liquidation, dissolution or winding up. In the event the Corporation shall at
any time after the Rights Declaration Date (i) declare or pay any dividend on
common stock payable in shares of common stock, or (ii) effect a subdivision or
combination or consolidation of the outstanding

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shares of common stock (by reclassification or otherwise than by payment of a
dividend in shares of common stock) into a greater or lesser number of shares of
common stock, then in each such case the aggregate amount per share to which
holders of shares of Series B Preferred Stock were entitled immediately prior to
such event under clause (x) of the preceding sentence shall be adjusted by
multiplying such amount by a fraction, the numerator of which is the number of
shares of common stock outstanding immediately after such event and the
denominator of which is the number of shares of common stock that were
outstanding immediately prior to such event.

         Neither the consolidation of nor merging of the Corporation with or
into any other corporation or corporations, nor the sale or other transfer of
all or substantially all of the assets of the Corporation, shall be deemed to be
a liquidation, dissolution or winding up of the Corporation within the meaning
of this Section 6.

         Section 7. CONSOLIDATION, MERGER, ETC. In case the Corporation shall
enter into any consolidation, merger, combination or other transaction in which
the shares of common stock are exchanged for or changed into other stock or
securities, cash and/or any other property, then in any such case the shares of
Series B Preferred Stock shall at the same time be similarly exchanged or
changed in an amount per share (subject to the provision for adjustment
hereinafter set forth) equal to 1,000 times the aggregate amount of stock,
securities, cash and/or any other property (payable in kind), as the case may
be, into which or for which each share of common stock is changed or exchanged,
plus accrued and unpaid dividends, if any, payable with respect to the Series B
Preferred Stock. In the event the Corporation shall at any time after the Rights
Declaration Date (i) declare or pay any dividend on common stock payable in
shares of common stock, or (ii) effect a subdivision or combination or
consolidation of the outstanding shares of common stock (by reclassification or
otherwise than by payment of a dividend in shares of common stock) into a
greater or lesser number of shares of common stock, then in each such case the
amount set forth in the preceding sentence with respect to the exchange or
change of shares of Series B Preferred Stock shall be adjusted by multiplying
such amount by a fraction, the numerator of which is the number of shares of
common stock outstanding immediately after such event and the denominator of
which is the number of shares of common stock that were outstanding immediately
prior to such event.

         Section 8. REDEMPTION. The shares of Series B Preferred Stock shall not
be redeemable.

         Section 9. RANKING. Unless otherwise expressly provided in the Articles
or a Certificate of Vote of Directors Establishing a Class of Stock relating to
any other series of preferred stock of the Corporation, the Series B Preferred
Stock shall rank junior to every other series of the Corporation's preferred
stock previously or hereafter authorized, as to the payment of dividends and the
distribution of assets on liquidation, dissolution or winding up and shall rank
senior to the common stock.

         Section 10. AMENDMENT. The Articles and this Certificate of Vote of
Directors Establishing a Class of Stock shall not be amended in any manner which
would materially alter or change the powers, preferences or special rights of
the Series B Preferred Stock so as to affect

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them adversely (within the meaning of Section 77 of Chapter 156B of the
Massachusetts General Laws) without the affirmative vote of the holders of
two-thirds or more of the outstanding shares of Series B Preferred Stock, voting
separately as a class.

         Section 11. FRACTIONAL SHARES. Series B Preferred Stock may be issued
in whole shares or in any fraction of a share that is one one-thousandth
(1/1,000th) of a share or any integral multiple of such fraction, which shall
entitle the holder, in proportion to such holder's fractional shares, to
exercise voting rights, receive dividends, participate in distributions and to
have the benefit of all other rights of holders of Series B Preferred Stock. In
lieu of fractional shares, the Corporation may elect to make a cash payment as
provided in the Rights Agreement for fractions of a share other than one
one-thousandth (1/1,000th) of a share or any integral multiple thereof.

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IN WITNESS WHEREOF AND UNDER THE PENALTIES OF PERJURY, we have hereto signed our
names this 21st day of April in the year 1999.



                                             /s/ John R. Putney, President
                                             -----------------------------------

                                             /s/ Susan G. Oullette, Clerk
                                             -----------------------------------


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                        THE COMMONWEALTH OF MASSACHUSETTS


                  CERTIFICATE OF VOTE OF DIRECTORS ESTABLISHING
                          A SERIES OF A CLASS OF STOCK
                    (General Laws, Chapter 156B, Section 26)

                     I hereby approve the within certificate
                     and, the filing fee in the amount of $
             having been paid, said certificate is hereby filed this
                              day of         , 19  .




                                                   WILLIAM FRANCIS GALVIN
                                                   Secretary of the Commonwealth



                         TO BE FILLED IN BY CORPORATION

                      PHOTO COPY OF CERTIFICATE TO BE SENT


                      TO:  Lynn D. Holdsworth
                           Goodwin, Procter & Hoar LLP
                           53 State Street
                           Boston, Massachusetts  02109
                           Telephone: (617) 570-1079