CHARTER ONE FINANCIAL INC
424B3, 1997-08-25
SAVINGS INSTITUTION, FEDERALLY CHARTERED
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<PAGE>   1



[CHARTER ONE LETTERHEAD]                        Filed Pursuant to Rule 424(b)(3)
                                                      Registration No. 333-33259

                                                                 August 25, 1997

Dear Stockholder:

       You are invited to attend a special meeting of stockholders (the "Special
Meeting") of Charter One Financial, Inc. ("Charter One") scheduled to be held at
the Forum Conference and Education Center, One Cleveland Center, 1375 East Ninth
Street, Cleveland, Ohio on Friday, October 3, 1997 at 10:30 a.m., local time.
Notice of the Special Meeting, a Joint Proxy Statement/Prospectus and a form of
proxy are enclosed.

       At the Special Meeting, stockholders will be asked to consider and vote
upon a proposal to adopt an Agreement and Plan of Merger and Reorganization,
dated May 21, 1997 (the "Merger Agreement"), pursuant to which, among other
things, RCSB Financial, Inc. ("RCSB") will be merged with and into
Charter-Michigan Bancorp, Inc., a wholly owned first-tier subsidiary of Charter
One (the "Merger"). Consummation of the Merger is subject to certain conditions,
including receipt of regulatory approvals and the requisite votes of the
stockholders of both Charter One and RCSB. Adoption of the Merger Agreement
requires the affirmative vote of a majority of the votes entitled to be cast by
the respective holders of Charter One and RCSB common stock. The terms of the
proposed Merger, including an explanation of the amount of Charter One stock to
be issued to RCSB stockholders, as well as other important information relating
to Charter One, RCSB and the combined company, are explained in the accompanying
Joint Proxy Statement/Prospectus.

       THE BOARD OF DIRECTORS OF CHARTER ONE HAS CAREFULLY REVIEWED THE PROPOSED
MERGER AND HAS UNANIMOUSLY CONCLUDED THAT THE TRANSACTION IS ADVISABLE AND IN
THE BEST INTEREST OF CHARTER ONE AND ITS STOCKHOLDERS. CHARTER ONE'S FINANCIAL
ADVISOR, MONTGOMERY SECURITIES, HAS ISSUED ITS OPINION THAT THE CONSIDERATION TO
BE PAID BY CHARTER ONE IN THE MERGER IS FAIR TO CHARTER ONE AND ITS STOCKHOLDERS
FROM A FINANCIAL POINT OF VIEW. ACCORDINGLY, I URGE YOU TO VOTE FOR THE MERGER.

       At the Special Meeting you will also be asked to consider and vote on a
proposal to adopt an amendment (the "Amendment") to Charter One's Second
Restated Certificate of Incorporation authorizing the number of directors on the
Charter One Board to be fixed by, or in the manner provided in, the Charter One
Bylaws. The Amendment is more fully described in the accompanying Joint Proxy
Statement/Prospectus. Adoption of the Amendment requires the approval of at
least 75 percent of the votes entitled to be cast at the Special Meeting by the
holders of Charter One common stock. ACCORDINGLY, I URGE YOU TO VOTE FOR THE
AMENDMENT.

       On April 22, 1997, we announced that Charter One entered into an
agreement to acquire Haverfield Corporation, the holding company for Home Bank,
F.S.B. Haverfield Cor this transaction is set forth in the accompanying Joint
Proxy Statement/Prospectus.

       Should any other matters be properly brought before the Special Meeting,
the persons named in the accompanying form of proxy will vote the shares
represented by such proxy upon such matters as determined by a majority of the
Board of Directors. You are urged to read the accompanying Notice of Special
Meeting and Joint Proxy Statement/Prospectus which contain a detailed
description of the Merger and other important information relating to Charter
One Financial, RCSB Financial and the combined companies.

       Your vote is important, regardless of the number of shares you own. ON
BEHALF OF THE BOARD OF DIRECTORS, I URGE YOU TO SIGN, DATE AND RETURN THE
ENCLOSED PROXY AS SOON AS POSSIBLE EVEN IF YOU CURRENTLY PLAN TO ATTEND THE
SPECIAL MEETING. This will not prevent you from voting in person but will assure
that your vote is counted if you do not attend the Special Meeting.

                                               Sincerely,

                                               /s/ Charles John Koch


                                               Charles John Koch
                                               Chairman of the Board, President
                                                 and Chief Executive Officer


<PAGE>   2




[RCSB LETTERHEAD]                                                        
                                                                        


                                                                 August 25, 1997

Dear Stockholder:

       You are invited to attend a special meeting of stockholders (the "Special
Meeting") of RCSB Financial, Inc. ("RCSB") scheduled to be held at the Hyatt
Regency Hotel, 125 East Main Street, Rochester, New York on Friday, October 3,
1997 at 10:30 a.m., local time. Notice of the Special Meeting, a Joint Proxy
Statement/Prospectus and a form of proxy are enclosed.

       At the Special Meeting, stockholders will be asked to consider and vote
upon a proposal to adopt an Agreement and Plan of Merger and Reorganization,
dated May 21, 1997 (the "Merger Agreement"), pursuant to which, among other
things, RCSB will be merged with and into Charter-Michigan Bancorp. Inc., a
wholly owned first-tier subsidiary of Charter One Financial, Inc. ("Charter
One") (the "Merger"). Consummation of the Merger is subject to certain
conditions, including receipt of regulatory approvals and the requisite votes of
the stockholders of both Charter One and RCSB. Adoption of the Merger Agreement
requires the affirmative vote of a majority of the votes entitled to be cast by
the holders of Charter One and RCSB common stock. The terms of the proposed
Merger, including an explanation of the amount of Charter One stock to be issued
to RCSB stockholders, as well as other important information relating to Charter
One, RCSB and the combined company are explained in the accompanying Joint Proxy
Statement/Prospectus.

       THE BOARD OF DIRECTORS OF RCSB HAS CAREFULLY REVIEWED THE PROPOSED MERGER
AND HAS UNANIMOUSLY CONCLUDED THAT THE TRANSACTION IS ADVISABLE AND FAIR TO, AND
IN THE BEST INTEREST OF, RCSB AND ITS STOCKHOLDERS. RCSB'S FINANCIAL ADVISOR,
LEHMAN BROTHERS, INC., HAS ISSUED ITS OPINION THAT THE EXCHANGE RATIO TO BE
OFFERED TO RCSB'S STOCKHOLDERS IN THE MERGER IS FAIR TO RCSB'S STOCKHOLDERS FROM
A FINANCIAL POINT OF VIEW. ACCORDINGLY, I URGE YOU TO VOTE FOR THE MERGER.

       On April 22, 1997, Charter One announced that it had entered into an
agreement to acquire Haverfield Corporation, the holding company for Home Bank,
F.S.B. Haverfield Corporation is based in Cleveland, Ohio. Certain information
relating to this transaction is set forth in the accompanying Joint Proxy
Statement/Prospectus.

       Should any other matters be properly brought before the Special Meeting,
the persons named in the accompanying form of proxy will vote the shares
represented by such proxy upon such matters as determined by a majority of the
Board of Directors. You are urged to read the accompanying Notice of Special
Meeting and Joint Proxy Statement/Prospectus which contain a detailed
description of the Merger and other important information relating to RCSB,
Charter One and the combined companies.  

       Your vote is important, regardless of the number of shares you own. ON
BEHALF OF THE BOARD OF DIRECTORS, I URGE YOU TO SIGN, DATE AND RETURN THE
ENCLOSED PROXY AS SOON AS POSSIBLE EVEN IF YOU CURRENTLY PLAN TO ATTEND THE
SPECIAL MEETING. This will not prevent you from voting in person but will
assure that your vote is counted if you do not attend the Special Meeting.

                                           Sincerely,

                                           /s/ Leonard S. Simon

                                           Leonard S. Simon
                                           Chairman of the Board, President
                                             and Chief Executive Officer

           PLEASE DO NOT SEND IN ANY STOCK CERTIFICATES AT THIS TIME.
               YOU WILL RECEIVE INSTRUCTIONS FOLLOWING THE MERGER
                       FOR EXCHANGE OF STOCK CERTIFICATES.

<PAGE>   3



                           CHARTER ONE FINANCIAL, INC.
                              1215 Superior Avenue
                              Cleveland, Ohio 44114
                                 (216) 566-5300

                                ----------------


                    NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                          TO BE HELD ON OCTOBER 3, 1997

       NOTICE IS HEREBY GIVEN THAT a Special Meeting of Stockholders (the
"Special Meeting") of Charter One Financial, Inc. ("Charter One") will be held
on Friday, October 3, 1997 at 10:30 a.m., local time, at the Forum Conference
and Education Center, One Cleveland Center, 1375 East Ninth Street, Cleveland,
Ohio for the following purposes:

              (1) To consider and vote upon a proposal to adopt the Agreement
       and Plan of Merger and Reorganization (the "Merger Agreement"), dated as
       of May 21, 1997, by and between Charter One, Charter-Michigan Bancorp,
       Inc., Charter One Bank, F.S.B., RCSB Financial, Inc. ("RCSB") and
       Rochester Community Savings Bank, a copy of which is included in the
       accompanying Joint Proxy Statement/Prospectus at Annex A, pursuant to
       which RCSB will be merged with and into Charter-Michigan Bancorp, Inc.,
       and each outstanding share of RCSB common stock will be converted into
       .91 shares of Charter One common stock (with cash paid in lieu of
       fractional share interests).

              (2) To consider and vote upon a proposal to adopt an amendment to
       the Charter One Second Restated Certificate of Incorporation (the
       "Certificate of Incorporation") authorizing the number of directors on
       the Charter One Board of Directors to be fixed by, or in the manner
       provided in, the Charter One Bylaws (the "Amendment").

              (3) Such other matters as may properly come before the Special
       Meeting or any adjournments thereof, including proposals to adjourn the
       Special Meeting to permit further solicitation of proxies by the Board of
       Directors in the event that there are not sufficient votes to adopt the
       Merger Agreement or the Amendment at the time of the Special Meeting;
       provided, however, that no proxy which is voted against the Merger
       Agreement or the Amendment will be voted in favor of adjournment to
       solicit further proxies for such proposal, respectively.

       The Board of Directors is not aware of any other business to come before
the Special Meeting.

       A PROXY CARD AND A JOINT PROXY STATEMENT/PROSPECTUS FOR THE SPECIAL
MEETING ARE ENCLOSED.

       Stockholders of record at the close of business on August 18, 1997, are
the stockholders entitled to vote at the Special Meeting and any adjournments
thereof. A list of Charter One stockholders entitled to vote at the Special
Meeting will be available for examination, for any purpose germane to the
Special Meeting, at the main office of Charter One during ordinary business
hours for at least ten days prior to the Special Meeting, as well as at the
Special Meeting.

       The affirmative vote of the holders of a majority of the outstanding
shares of Charter One common stock is required to approve the proposal to adopt
the Merger Agreement. The affirmative vote of the holders of 75 percent of the
outstanding shares of Charter One common stock is required to approve the
proposal to adopt the Amendment. Adoption of the Merger Agreement is not
conditioned upon stockholder approval of the Amendment, and adoption of the
Amendment is not conditioned upon stockholder approval of the Merger Agreement.


<PAGE>   4



       You are requested to complete, sign and date the enclosed form of proxy,
which is solicited on behalf of the Board of Directors, and to mail it promptly
in the enclosed postage-paid envelope. The proxy will not be used if you attend
and vote at the Special Meeting in person.

       Remember, if your shares are held in the name of a broker, only your
broker can vote your shares and only after receiving your instructions. Please
contact the person responsible for your account and instruct him/her to execute
a proxy card on your behalf.

       Should you have any questions or require assistance, please call
Georgeson & Company, Inc., which is assisting us in the solicitation of proxies,
at (800) 223-2064.

       YOU ARE REQUESTED TO FILL IN AND SIGN THE ENCLOSED FORM OF PROXY WHICH IS
SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS AND TO MAIL IT PROMPTLY IN THE
ENCLOSED ENVELOPE. THE PROXY WILL NOT BE USED IF YOU ATTEND AND VOTE AT THE
SPECIAL MEETING IN PERSON.

                                      By Order of the Board of Directors
                     
                                      /s/ Charles John Koch

                                      Charles John Koch
                                      Chairman of the Board, President
                                       and Chief Executive Officer

Cleveland, Ohio
August 25, 1997

- --------------------------------------------------------------------------------
IT IS IMPORTANT THAT PROXIES BE RETURNED PROMPTLY.  THEREFORE, WHETHER OR NOT
YOU PLAN TO BE PRESENT AT THE SPECIAL MEETING, PLEASE SIGN, DATE AND COMPLETE
THE ENCLOSED PROXY AND RETURN IT IN THE ENCLOSED ENVELOPE WHICH REQUIRES NO
POSTAGE IF MAILED IN THE UNITED STATES.

- --------------------------------------------------------------------------------



<PAGE>   5




                              RCSB FINANCIAL, INC.
                              235 East Main Street
                            Rochester, New York 14604
                                 (716) 423-7270

                                ----------------


                    NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                          TO BE HELD ON OCTOBER 3, 1997

       NOTICE IS HEREBY GIVEN THAT a Special Meeting of Stockholders (the
"Special Meeting") of RCSB Financial, Inc. ("RCSB") will be held on Friday,
October 3, 1997 at 10:30 a.m., local time, at the Hyatt Regency Hotel, 125 East
Main Street, Rochester, New York for the following purposes:

              (1) To consider and vote upon a proposal to adopt the Agreement
       and Plan of Merger and Reorganization (the "Merger Agreement"), dated as
       of May 21, 1997, by and between Charter One Financial, Inc. ("Charter
       One"), Charter-Michigan Bancorp, Inc., Charter One Bank, F.S.B., RCSB and
       Rochester Community Savings Bank, a copy of which is included in the
       accompanying Joint Proxy Statement/Prospectus at Annex A, pursuant to
       which RCSB will be merged with and into Charter-Michigan Bancorp, Inc., a
       wholly owned first-tier subsidiary of Charter One, and each outstanding
       share of RCSB common stock will be converted into .91 shares of Charter
       One common stock (with cash paid in lieu of fractional share interests).

              (2) Such other matters as may properly come before the Special
       Meeting or any adjournments thereof, including proposals to adjourn the
       Special Meeting to permit further solicitation of proxies by the Board of
       Directors in the event that there are not sufficient votes to adopt the
       Merger Agreement at the time of the Special Meeting; provided, however,
       that no proxy which is voted against the Merger Agreement will be voted
       in favor of adjournment to solicit further proxies for such proposal.

       The Board of Directors is not aware of any other business to come before
the Special Meeting.

       A PROXY CARD AND A JOINT PROXY STATEMENT/PROSPECTUS FOR THE SPECIAL
MEETING ARE ENCLOSED.

       Stockholders of record at the close of business on August 18, 1997, are
the stockholders entitled to vote at the Special Meeting and any adjournments
thereof. A list of RCSB stockholders entitled to vote at the Special Meeting
will be available for examination, for any purpose germane to the Special
Meeting, at the main office of RCSB during ordinary business hours for at least
ten days prior to the Special Meeting, as well as at the Special Meeting.

       The affirmative vote of the holders of a majority of the outstanding
shares of RCSB common stock is required to approve the proposal to adopt the
Merger Agreement.

       You are requested to complete, sign and date the enclosed form of proxy,
which is solicited on behalf of the Board of Directors, and to mail it promptly
in the enclosed postage-paid envelope. The proxy will not be used if you attend
and vote at the Special Meeting in person.

       Remember, if your shares are held in the name of a broker, only your
broker can vote your shares and only after receiving your instructions. Please
contact the person responsible for your account and instruct him/her to execute
a proxy card on your behalf.

       Should you have any questions or require assistance, please call
Georgeson & Company, Inc., which is assisting us in the solicitation of proxies,
at (800) 223-2064.


<PAGE>   6


       YOU ARE REQUESTED TO FILL IN AND SIGN THE ENCLOSED FORM OF PROXY WHICH IS
SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS AND TO MAIL IT PROMPTLY IN THE
ENCLOSED ENVELOPE. THE PROXY WILL NOT BE USED IF YOU ATTEND AND VOTE AT THE
SPECIAL MEETING IN PERSON.

                                   By Order of the Board of Directors

                                   /s/ Rosemary Craig

                                   Rosemary Craig
                                   Corporate Secretary

Rochester, New York
August 25, 1997

IMPORTANT: THE PROMPT RETURN OF PROXIES WILL SAVE RCSB THE EXPENSE OF FURTHER
REQUESTS FOR PROXIES.  AN ADDRESSED ENVELOPE IS ENCLOSED FOR YOUR CONVENIENCE.
NO POSTAGE IS REQUIRED IF MAILED IN THE UNITED STATES.


<PAGE>   7




                              JOINT PROXY STATEMENT
                                       OF
                           CHARTER ONE FINANCIAL, INC.
                                       AND
                              RCSB FINANCIAL, INC.
                          FOR SPECIAL MEETINGS OF THEIR
                             RESPECTIVE STOCKHOLDERS
                         TO BE HELD ON OCTOBER 3, 1997

                                   ----------

                                   PROSPECTUS
                                       OF
                           CHARTER ONE FINANCIAL, INC.
                    UP TO 13,877,460 SHARES OF COMMON STOCK,
                            PAR VALUE $.01 PER SHARE

                                   ----------

       This Joint Proxy Statement/Prospectus relates to the approval and
adoption of the Agreement and Plan of Merger and Reorganization (the "Merger
Agreement"), dated as of May 21, 1997, by and among Charter One Financial, Inc.
("Charter One"), Charter-Michigan Bancorp, Inc. ("Charter Michigan"), Charter
One Bank, F.S.B. ("Charter One Bank"), RCSB Financial, Inc. ("RCSB") and
Rochester Community Savings Bank ("Rochester Bank"), including the merger
pursuant to which RCSB will be merged with and into Charter Michigan in a
stock-for-stock exchange (the "Merger"). See "SUMMARY - Summary of Certain
Aspects of the Merger" and "THE MERGER." The Merger Agreement is included at
Annex A and incorporated herein by reference.

       The Merger Agreement provides that at the Effective Time (as defined
herein) each issued and outstanding share of the common stock, par value $1.00
per share, of RCSB (the "RCSB Common Stock"), excluding any shares of stock held
by Charter One, RCSB or their subsidiaries, other than in a fiduciary capacity
or in satisfaction of a debt previously contracted ("Excluded Shares"), will be
canceled and converted into .91 shares (the "Exchange Ratio") of the common
stock, par value $.01 per share, of Charter One (the "Charter One Common
Stock"), including a corresponding number of rights associated with Charter One
Common Stock pursuant to the Rights Agreement (the "Merger Consideration"). For
a discussion of the rights and the Rights Agreement, see "COMPARISON OF RIGHTS
OF STOCKHOLDERS OF CHARTER ONE FINANCIAL, INC. AND RCSB FINANCIAL, INC. --
Rights Agreements."


                                             (Cover page continued on next page)

                                   ----------

       THE SHARES OF CHARTER ONE COMMON STOCK OFFERED HEREBY HAVE NOT BEEN
APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION, THE OFFICE OF
THRIFT SUPERVISION, THE NEW YORK SUPERINTENDENT OF BANKS, ANY STATE SECURITIES
COMMISSION OR ANY OTHER GOVERNMENTAL AGENCY, AND NEITHER THE SECURITIES AND
EXCHANGE COMMISSION, THE OFFICE OF THRIFT SUPERVISION, THE NEW YORK
SUPERINTENDENT OF BANKS, ANY STATE SECURITIES COMMISSION NOR ANY OTHER AGENCY
HAS PASSED UPON THE ACCURACY OR ADEQUACY OF THIS JOINT PROXY
STATEMENT/PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

       THE SHARES OF CHARTER ONE COMMON STOCK OFFERED HEREBY ARE NOT SAVINGS
ACCOUNTS, DEPOSITS OR OTHER OBLIGATIONS OF ANY BANK OR SAVINGS ASSOCIATION AND
ARE NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE BANK INSURANCE
FUND, THE SAVINGS ASSOCIATION INSURANCE FUND OR ANY OTHER GOVERNMENTAL AGENCY.

                                   ----------

      The date of this Joint Proxy Statement/Prospectus is August 12, 1997


<PAGE>   8



       In addition, this Joint Proxy Statement/Prospectus relates to a proposal
to approve and adopt an amendment (the "Amendment") to the Second Restated
Certificate of Incorporation of Charter One (the "Charter One Certificate of
Incorporation") authorizing the number of directors on the Board of Directors of
Charter One (the "Charter One Board") to be fixed by, or in the manner provided
in, the Charter One bylaws (the "Charter One Bylaws"). See "AMENDMENT TO THE
SECOND RESTATED CERTIFICATE OF INCORPORATION OF CHARTER ONE FINANCIAL."

       This Joint Proxy Statement/Prospectus is being furnished to the holders
of shares of Charter One Common Stock in connection with the solicitation of
proxies by the Board of Directors of Charter One for use at a special meeting of
stockholders of Charter One (the "Charter One Special Meeting") scheduled to be
held at 10:30 a.m., local time, on Friday, October 3, 1997 at the Forum
Conference and Education Center, One Cleveland Center, 1375 East Ninth Street,
Cleveland, Ohio, and at any and all adjournments or postponements thereof.

       This Joint Proxy Statement/Prospectus also is being furnished to the
holders of shares of RCSB Common Stock in connection with the solicitation of
proxies by the Board of Directors of RCSB (the "RCSB Board") for use at a
special meeting of stockholders of RCSB (the "RCSB Special Meeting" and,
together with the Charter One Special Meeting, the "Special Meetings") scheduled
to be held at 10:30 a.m., local time on Friday, October 3, 1997 at the Hyatt
Regency Hotel, 125 East Main Street, Rochester, New York, and at any and all
adjournments or postponements thereof.

       This Joint Proxy Statement/Prospectus also constitutes a prospectus of
Charter One, filed as part of the Registration Statement (defined below) with
respect to up to 13,877,460 shares of Charter One Common Stock to be issued upon
consummation of the Merger pursuant to the terms of the Merger Agreement,
including a correspondence number of rights associated with the Charter One
Common Stock pursuant to the Rights Agreement. For a description of the Rights
Agreement, see "COMPARISON OF RIGHTS OF STOCKHOLDERS OF CHARTER ONE     
FINANCIAL, INC. AND RCSB FINANCIAL, INC. -- Rights Agreements."

       On April 22, 1997 Charter One entered into an agreement to acquire
Haverfield Corporation ("Haverfield"), an Ohio corporation and the holding
company of Home Bank, F.S.B. ("Home Bank"). Haverfield and Home Bank are based
in Cleveland, Ohio. This Joint Proxy Statement/Prospectus contains certain
information relating to Charter One's transaction with Haverfield. See
"SUMMARY," "RECENT DEVELOPMENTS," "UNAUDITED PRO FORMA COMBINED FINANCIAL
STATEMENTS" and "UNAUDITED PRO FORMA PER SHARE DATA."

       This Joint Proxy Statement/Prospectus, and the accompanying notices and
forms of proxy, are first being mailed to stockholders of Charter One and RCSB
on or about August 25, 1997.

                              AVAILABLE INFORMATION

       Charter One and RCSB are subject to the informational reporting
requirements of the Securities Exchange Act of 1934, as amended (the "Exchange
Act") and, in accordance therewith, file reports, proxy statements and other
information with the Securities and Exchange Commission (the "Commission"). Such
reports, proxy statements and other information filed by Charter One and RCSB
can be obtained, upon payment of prescribed fees, from the Public Reference
Section of the Commission at Judiciary Plaza, 450 Fifth Street, N.W., Washington
D.C. 20549. In addition, such information can be inspected and copied at the
public reference facilities of the Commission located at 450 Fifth Street, N.W.,
Room 1024, Washington, D.C. 20549 and at the Commission's Regional Offices
located at the Northwestern Atrium Center, Suite 1400, 500 West Madison Street,
Chicago, Illinois 60611 and 7 World Trade Center, 13th Floor, New York, New York
10048. In addition, the Commission maintains a Web site that contains reports,
proxy and information statements and other information regarding the electronic
filings of Charter One and RCSB with the Commission. The address of the
Commission Web site is "http://www.sec.gov."

       Charter One has filed with the Commission a registration statement on
Form S-4 (333-33259) (together with all amendments, schedules, and exhibits
thereto, the "Registration Statement") under the Securities Act of 1933, as
amended (the "Securities Act"), with respect to the shares of Charter One Common
Stock to be issued pursuant to and as contemplated by the Merger Agreement. This
Joint Proxy Statement/Prospectus does not contain all the information set forth
in the Registration Statement, certain parts of which have been omitted in
accordance with the rules and

                                       ii


<PAGE>   9



regulations of the Commission. The Registration Statement is available for
inspection and copying as set forth above. Statements contained in this Joint
Proxy Statement/Prospectus or in any document incorporated by reference in this
Joint Proxy Statement/Prospectus as to the contents of any contract or other
document are not necessarily complete, and in each instance reference is made to
the copy of such contract or other document filed as an exhibit to the
Registration Statement, each such statement being qualified in all respects by
such reference.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

       THIS JOINT PROXY STATEMENT/PROSPECTUS INCORPORATES DOCUMENTS BY REFERENCE
WHICH ARE NOT PRESENTED HEREIN OR DELIVERED HEREWITH. SUCH DOCUMENTS (EXCLUDING
EXHIBITS NOT SPECIFICALLY INCORPORATED BY REFERENCE) ARE AVAILABLE, WITHOUT
CHARGE, TO ANY PERSON, INCLUDING ANY BENEFICIAL OWNER, TO WHOM THIS JOINT PROXY
STATEMENT/PROSPECTUS IS DELIVERED BY OR ON BEHALF OF CHARTER ONE OR RCSB, UPON
THE WRITTEN OR ORAL REQUEST OF SUCH PERSON, IN THE CASE OF DOCUMENTS RELATING TO
CHARTER ONE, TO ROBERT J. VANA, CHIEF CORPORATE COUNSEL AND CORPORATE SECRETARY,
CHARTER ONE FINANCIAL, INC., 1215 SUPERIOR AVENUE, CLEVELAND, OHIO 44114,
TELEPHONE (216) 566-5300; OR IN THE CASE OF DOCUMENTS RELATING TO RCSB, TO
ROSEMARY CRAIG, SECRETARY, RCSB FINANCIAL, INC., 235 EAST MAIN STREET,
ROCHESTER, NEW YORK 14604, TELEPHONE (716) 423-7370. IN ORDER TO ENSURE TIMELY
DELIVERY OF THE DOCUMENTS PRIOR TO THE SPECIAL MEETINGS, ANY REQUEST SHOULD BE
MADE BY SEPTEMBER 26, 1997. PERSONS REQUESTING COPIES OF EXHIBITS TO DOCUMENTS
WHICH ARE NOT SPECIFICALLY INCORPORATED BY REFERENCE IN SUCH DOCUMENTS MAY BE
CHARGED THE COST OF REPRODUCTION AND MAILING.

       The following documents previously filed with the Commission by Charter
One (File No. 0-16311) are hereby incorporated by reference in this Joint Proxy
Statement/Prospectus:

       1.     The Annual Report on Form 10-K of Charter One for the fiscal year
              ended December 31, 1996, as amended on Forms 10-K/A on August 8,
              1997 and August 12, 1997 (the "1996 Charter One 10-K").

       2.     All other reports filed by Charter One pursuant to Section 13(a)
              or 15(d) of the Exchange Act since the end of the fiscal year
              covered by the 1996 Charter One 10-K (including Charter One's
              Current Reports on Form 8-K dated April 22, 1997, May 21, 1997,
              July 29, 1997 and August 8, 1997, and its Quarterly Reports on
              Form 10-Q for the quarterly periods ended March 31, 1997, as
              amended on Form 10-Q/A, and June 30, 1997).

       3.     The portions of Charter One's proxy statement for the Annual
              Meeting of Stockholders held April 24, 1997 that have been
              incorporated by reference in the 1996 Charter One 10-K.

       4.     The description of the Charter One Common Stock contained in
              Charter One's Registration Statement on Form 8-A with respect
              thereto dated January 12, 1988 (and any amendment or report filed
              for the purpose of updating the description).

       5.     The description of the rights issued pursuant to the Rights
              Agreement, dated as of November 20, 1989 (the "Rights Agreement"),
              by and between Charter One and The First National Bank of Boston,
              as rights agent, contained in Charter One's Registration Statement
              on Form 8-A with respect thereto dated November 21, 1989 as
              amended on May 26, 1995 (and any amendment or report filed for the
              purpose of updating the description).

       The following documents previously filed with the Commission by RCSB
(File No. 0-17709) are hereby incorporated by reference in this Joint Proxy
Statement/Prospectus:

       1.     The Annual Report on Form 10-K of RCSB for the fiscal year ended
              November 30, 1996 (the "1996 RCSB 10-K").

       2.     All other reports filed by RCSB pursuant to Section 13(a) or 15(d)
              of the Exchange Act since the end of the fiscal year covered by
              the 1996 RCSB 10-K (including RCSB's Quarterly Reports on Form
              10-Q for the quarters ended February 28, 1997 and May 31, 1997).

                                       iii


<PAGE>   10




       3.     The portions of RCSB's proxy statement for the Annual Meeting of
              Stockholders held on April 9, 1997 that have been incorporated by
              reference in the 1996 RCSB 10-K.

       All documents filed by Charter One and RCSB with the Commission pursuant
to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this
Joint Proxy Statement/Prospectus and prior to the date of the Special Meetings
shall be deemed to be incorporated by reference herein and to be a part hereof
from the date of filing such documents.

       Any statement contained in this Joint Proxy Statement/Prospectus or in a
document incorporated or deemed to be incorporated by reference herein shall be
deemed to be modified or superseded for purposes of this Joint Proxy
Statement/Prospectus to the extent that a statement contained herein or in any
other subsequently filed document which also is deemed to be incorporated by
reference herein modifies or supersedes such statement. Any statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this Joint Proxy Statement/Prospectus.

       All information contained in this Joint Proxy Statement/Prospectus with
respect to Charter One, Haverfield and their subsidiaries has been supplied by
Charter One, and all information with respect to RCSB and its subsidiaries has
been supplied by RCSB.
                                   ----------

       NO PERSON IS AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATION OTHER THAN THOSE CONTAINED OR INCORPORATED BY REFERENCE IN THIS
JOINT PROXY STATEMENT/PROSPECTUS, AND, IF GIVEN OR MADE, SUCH INFORMATION OR
REPRESENTATION SHOULD NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED. THIS JOINT
PROXY STATEMENT/PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL, OR A
SOLICITATION OF AN OFFER TO PURCHASE, THE SECURITIES OFFERED BY THIS JOINT PROXY
STATEMENT/PROSPECTUS, OR THE SOLICITATION OF A PROXY, IN ANY JURISDICTION, TO OR
FROM ANY PERSON TO WHOM OR FROM WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER,
SOLICITATION OF AN OFFER OR PROXY SOLICITATION IN SUCH JURISDICTION. NEITHER THE
DELIVERY OF THE JOINT PROXY STATEMENT/ PROSPECTUS NOR ANY DISTRIBUTION OF
SECURITIES PURSUANT TO THIS JOINT PROXY STATEMENT/PROSPECTUS SHALL, UNDER ANY
CIRCUMSTANCES, CREATE AN IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE
AFFAIRS OF CHARTER ONE OR RCSB OR ANY OF THEIR RESPECTIVE SUBSIDIARIES, OR IN
THE INFORMATION SET FORTH HEREIN, SINCE THE DATE OF THIS JOINT PROXY
STATEMENT/PROSPECTUS.

       THIS JOINT PROXY STATEMENT/PROSPECTUS CONTAINS CERTAIN FORWARD-LOOKING
STATEMENTS WITH RESPECT TO THE FINANCIAL CONDITION, RESULTS OF OPERATIONS AND
BUSINESS OF CHARTER ONE FOLLOWING THE CONSUMMATION OF THE MERGER, INCLUDING
STATEMENTS RELATING TO THE COST SAVINGS AND FUNDING ADVANTAGES THAT ARE EXPECTED
TO BE REALIZED FROM THE MERGER AND THE EXPECTED IMPACT OF THE MERGER ON CHARTER
ONE'S FINANCIAL PERFORMANCE AND EARNINGS ESTIMATES FOR THE COMBINED COMPANY. SEE
"THE MERGER -- BACKGROUND OF AND REASONS FOR THE MERGER," "-- OPINION OF CHARTER
ONE'S FINANCIAL ADVISOR" AND "UNAUDITED PRO FORMA COMBINED FINANCIAL
STATEMENTS." THESE FORWARD-LOOKING STATEMENTS INVOLVE CERTAIN RISKS AND
UNCERTAINTIES. FACTORS THAT MAY CAUSE ACTUAL RESULTS TO DIFFER MATERIALLY FROM
THOSE CONTEMPLATED BY SUCH FORWARD-LOOKING STATEMENTS INCLUDE, AMONG OTHERS, THE
FOLLOWING POSSIBILITIES: (1) EXPECTED COST SAVINGS FROM THE MERGER CANNOT BE
FULLY REALIZED; (2) DEPOSIT ATTRITION, CUSTOMER LOSS OR REVENUE LOSS FOLLOWING
THE MERGER; (3) COMPETITIVE PRESSURE IN THE BANKING INDUSTRY INCREASES
SIGNIFICANTLY; (4) COSTS OR DIFFICULTIES RELATED TO THE INTEGRATION OF THE
BUSINESSES OF CHARTER ONE AND RCSB ARE GREATER THAN EXPECTED; (5) CHANGES IN THE
INTEREST RATE ENVIRONMENT REDUCE MARGINS MORE THAN PLANNED; (6) GENERAL ECONOMIC
CONDITIONS, EITHER NATIONALLY OR REGIONALLY, ARE LESS FAVORABLE THAN EXPECTED,
RESULTING IN, AMONG OTHER THINGS, A DETERIORATION IN CREDIT QUALITY; (7) THE
IMPACT OF REGULATORY CHANGES IS OTHER THAN EXPECTED; (8) CHANGES IN BUSINESS
CONDITIONS AND INFLATION; AND (9) CHANGES IN THE SECURITIES MARKETS. FURTHER
INFORMATION ON OTHER FACTORS WHICH COULD AFFECT THE FINANCIAL RESULTS OF CHARTER
ONE AFTER THE MERGER IS INCLUDED IN THE COMMISSION FILINGS INCORPORATED BY
REFERENCE HEREIN.

                                   ----------
                                       iv


<PAGE>   11



                                TABLE OF CONTENTS

                                                                           Page
                                                                           ----

AVAILABLE INFORMATION......................................................   ii
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE............................  iii
TABLE OF CONTENTS..........................................................   v
SUMMARY....................................................................   1

        The Special Meetings...............................................   1
        The Parties to the Merger..........................................   3
        Summary of Certain Aspects of the Merger...........................   3
        Certain Related Matters............................................   7
        Comparative Stock Prices and Dividend Information..................   8
        Selected Consolidated Financial and Other Data of Charter 
         One Financial, Inc................................................  10
        Selected Consolidated Financial and Other Data of RCSB 
         Financial, Inc....................................................  12

THE SPECIAL MEETINGS.......................................................  13

        Charter One Special Meeting........................................  13
        RCSB Special Meeting...............................................  14
        No Appraisal Rights................................................  16

CHARTER ONE FINANCIAL, INC., CHARTER-MICHIGAN BANCORP, INC.
   AND CHARTER ONE BANK, F.S.B.............................................  17
        General............................................................  17
        Beneficial Ownership of Certain Persons............................  18

RCSB FINANCIAL, INC. AND ROCHESTER COMMUNITY SAVINGS BANK..................  20

        General............................................................  20
        Beneficial Ownership of Certain Persons............................  21

RECENT DEVELOPMENTS........................................................  23
THE MERGER.................................................................  24

        General............................................................. 24
        Background of and Reasons for the Merger............................ 24
        Recommendation of the Charter One Board............................. 27
        Recommendation of the RCSB Board.................................... 27
        Opinion of Charter One's Financial Advisor.......................... 27
        Opinion of RCSB's Financial Advisor................................. 31
        Merger Consideration................................................ 35
        Fractional Shares................................................... 35
        Treatment of RCSB Stock Options..................................... 36
        Effective Time...................................................... 36
        Exchange of Certificates; Lost Certificates......................... 36
        Interests of Certain Persons in the Merger.......................... 37
        Representations and Warranties...................................... 40
        Conditions to the Merger............................................ 40
        Regulatory Approvals................................................ 41
        Amendment; Termination; Liabilities and Remedies 
          for Breach........................................................ 42
        Conduct of Business Pending the Merger.............................. 42
        Expenses............................................................ 44
        Accounting Treatment................................................ 44
        Resale of Charter One Common Stock by Affiliates.................... 44
        Certain Federal Income Tax Consequences of the Merger............... 45
        Nasdaq Listing...................................................... 46

MANAGEMENT AND OPERATIONS AFTER THE MERGER.................................. 46
        Directors After the Merger.......................................... 46
        Officers After the Merger........................................... 48
        Consolidation of Operations......................................... 48
        Post-Merger Dividend Policy......................................... 48

                                        v


<PAGE>   12



CERTAIN RELATED MATTERS..................................................... 49
               Stock Option Agreement....................................... 49
               The Bank Merger.............................................. 50

UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS........................... 51
               Unaudited Pro Forma Combined Statement of 
                 Financial Condition........................................ 52
               Unaudited Pro Forma Combined Statements of Income............ 53
               Notes to Unaudited Pro Forma Combined Financial 
                 Statements................................................. 58

UNAUDITED PRO FORMA PER SHARE DATA.......................................... 60
DESCRIPTION OF CHARTER ONE FINANCIAL, INC. CAPITAL STOCK.................... 61

               General...................................................... 61
               Common Stock................................................. 61
               Preferred Stock.............................................. 62

COMPARISON OF RIGHTS OF STOCKHOLDERS OF CHARTER ONE
 FINANCIAL, INC. AND  RCSB FINANCIAL, INC................................... 62
               Introduction................................................. 62
               Issuance of Capital Stock.................................... 63
               Payment of Dividends......................................... 63
               Advance Notice Requirements for Presentation of New Business 
                and Nominations of Directors at Annual Meetings of 
                Stockholders................................................ 63
               Cumulative Voting for Election of Directors.................. 63
               Restrictions on Voting Rights; Quorum........................ 63
               Number and Term of Directors................................. 64
               Removal of Directors......................................... 64
               Filling Vacancies on the Board of Directors.................. 64
               Amendment to the Second Restated Certificate of 
                Incorporation............................................... 64
               Amendment and Repeal of Bylaws............................... 65
               Control Share Acquisitions................................... 65
               Business Combinations with Certain Persons................... 65
               Prevention of Greenmail...................................... 66
               Limitations on Directors' Liability.......................... 66
               Indemnification.............................................. 66
               Mergers, Acquisitions and Certain Other Transactions......... 67
               Action Without a Meeting..................................... 67
               Special Meetings of Stockholders............................. 67
               Preemptive Rights............................................ 68
               Appraisal Rights of Dissenting Stockholders.................. 68
               Special Provisions to Charter One's Bylaws................... 68
               Rights Agreements............................................ 68

AMENDMENT TO THE SECOND RESTATED CERTIFICATE OF INCORPORATION OF
 CHARTER ONE FINANCIAL, INC................................................. 72
LEGAL MATTERS............................................................... 72
EXPERTS..................................................................... 73
STOCKHOLDER PROPOSALS....................................................... 73
OTHER MATTERS............................................................... 73
ANNEXES


       A.     Agreement and Plan of Merger and Reorganization 
              (omitting schedules and exhibits)
       B.     Fairness Opinion of Montgomery Securities
       C.     Fairness Opinion of Lehman Brothers Inc.
       D.     Stock Option Agreement

                                       vi


<PAGE>   13



                                     SUMMARY

       The following is a brief summary of certain information contained
elsewhere or incorporated by reference in this Joint Proxy Statement/Prospectus.
Certain capitalized terms used in this summary are defined elsewhere in this
Joint Proxy Statement/Prospectus. This summary is necessarily incomplete and is
qualified in its entirety by, and reference is made to, the more detailed
information contained elsewhere in this Joint Proxy Statement/Prospectus, the
accompanying Annexes and the documents referred to and incorporated by reference
herein.

                              THE SPECIAL MEETINGS

CHARTER ONE SPECIAL MEETING

       Meeting Date; Record Date. The Charter One Special Meeting is scheduled
to be held at the Forum Conference and Education Center, One Cleveland Center,
1375 East Ninth Street, Cleveland, Ohio, on Friday, October 3, 1997 at 10:30
a.m., local time, unless adjourned or postponed. Only holders of record of
Charter One Common Stock at the close of business on August 18, 1997 (the
"Charter One Record Date"), are entitled to notice of and to vote at the Charter
One Special Meeting.

       Matters to be Considered. At the Charter One Special Meeting, holders of
shares of Charter One Common Stock will consider and vote upon a proposal to
adopt the Merger Agreement. See "SUMMARY -- Summary of Certain Aspects of the
Merger" and "THE MERGER." At the Charter One Special Meeting, holders of Charter
One Common Stock will also consider and vote upon a proposal to adopt the
Amendment. Charter One stockholders also may consider and vote upon such other
matters as are properly brought before the Charter One Special Meeting,
including proposals to adjourn the Charter One Special Meeting to permit further
solicitation of proxies by the Charter One Board in the event that there are not
sufficient votes to approve any proposal at the time of the Charter One Special
Meeting; provided, however, that no proxy which is voted against the proposals
to adopt the Merger Agreement or the Amendment will be voted in favor of
adjournment to solicit further proxies for such proposal.

          THE CHARTER ONE BOARD UNANIMOUSLY RECOMMENDS THAT CHARTER ONE
   STOCKHOLDERS VOTE FOR ADOPTION OF THE MERGER AGREEMENT AND THE AMENDMENT.

       Vote Required. Adoption of the Merger Agreement requires the affirmative
vote of the majority of the outstanding shares of Charter One Common Stock
entitled to vote at the Charter One Special Meeting. The affirmative vote of 75
percent of the outstanding shares of Charter One Common Stock is required to
adopt the Amendment. As of the Charter One Record Date, there were 46,249,711
shares of Charter One Common Stock entitled to be voted at the Charter One
Special Meeting.

       The affirmative vote of a majority of shares represented at the Charter
One Special Meeting may authorize adjournment of the meeting.

       Adoption of the Merger Agreement by the stockholders of Charter One is a
condition to, and required for, consummation of the Merger. See "THE
MERGER--Conditions to the Merger." Adoption of the Merger Agreement is not
conditioned upon stockholder adoption of the Amendment, and adoption of the
Amendment is not conditioned on stockholder adoption of the Merger Agreement.

       Proxies. Any proxy given pursuant to this solicitation or otherwise may
be revoked by the person giving it at any time before it is voted by delivering
to the Secretary of Charter One at 1215 Superior Avenue, Cleveland, Ohio 44114
on or before the taking of the vote at the Charter One Special Meeting, a
written notice of revocation bearing a later date than the proxy or a later
dated proxy relating to the same shares of Charter One Common Stock, or by
attending the Charter One Special Meeting and voting in person. Attendance at
the Charter One Special Meeting will not in itself constitute the revocation of
a proxy.

       No Appraisal Rights. Holders of Charter One Common Stock are not entitled
to appraisal rights under the Delaware General Corporation Law ("DGCL") in
connection with the Merger.


<PAGE>   14



       Security Ownership. As of the Charter One Record Date, directors and
executive officers of Charter One and their affiliates were beneficial owners of
3,050,625 shares (excluding shares underlying stock options), or 6.6% of the
then outstanding shares, of Charter One Common Stock. The directors and
executive officers of Charter One have indicated their intention to vote or
cause to be voted the shares of Charter One Common Stock owned or controlled by
them for approval and adoption of the Merger Agreement and the Amendment at the
Charter One Special Meeting.

       As of the Charter One Record Date, RCSB, directors and executive officers
of RCSB and their affiliates did not beneficially own any shares of Charter One
Common Stock.

       For additional information, see "THE SPECIAL MEETINGS -- Charter One
Special Meeting."

RCSB SPECIAL MEETING

       Meeting Date; Record Date. The RCSB Special Meeting is scheduled to be
held at the Hyatt Regency Hotel, 125 East Main Street, Rochester, New York, on
Friday, October 3, 1997 at 10:30 a.m., local time, unless adjourned or
postponed. Only holders of record of RCSB Common Stock at the close of business
on August 18, 1997 (the "RCSB Record Date"), are entitled to notice of and to
vote at the RCSB Special Meeting.

       Matters to be Considered. At the RCSB Special Meeting, holders of shares
of RCSB Common Stock will consider and vote upon a proposal to adopt the Merger
Agreement. See "-- Summary of Certain Aspects of the Merger" and "THE MERGER."
RCSB stockholders also may consider and vote upon such other matters as are
properly brought before the RCSB Special Meeting, including proposals to adjourn
the RCSB Special Meeting to permit further solicitation of proxies by the RCSB
Board in the event that there are not sufficient votes to approve any proposal
at the time of the RCSB Special Meeting; provided, however, that no proxy which
is voted against the proposal to adopt the Merger Agreement will be voted in
favor of adjournment to solicit further proxies for such proposal.

       THE RCSB BOARD UNANIMOUSLY RECOMMENDS THAT RCSB STOCKHOLDERS VOTE FOR
ADOPTION OF THE MERGER AGREEMENT.

       Vote Required. Adoption of the Merger Agreement requires the affirmative
vote of the majority of the outstanding shares of RCSB Common Stock entitled to
vote at the RCSB Special Meeting. As of the RCSB Record Date, there were
14,816,228 shares of RCSB Common Stock entitled to be voted at the RCSB Special
Meeting.

       The affirmative vote of a majority of shares represented at the RCSB
Special Meeting may authorize the adjournment of the meeting.

       Adoption of the Merger Agreement by the stockholders of RCSB is a
condition to, and required for, consummation of the Merger. See "THE
MERGER--Conditions to the Merger."

       Proxies. Any proxy given pursuant to this solicitation or otherwise may
be revoked by the person giving it at any time before it is voted by delivering
to the Secretary of RCSB at 235 East Main Street, Rochester, New York 14604 on
or before the taking of the vote at the RCSB Special Meeting, a written notice
of revocation bearing a later date than the proxy or a later dated proxy
relating to the same shares of RCSB Common Stock, or by attending the RCSB
Special Meeting and voting in person. Attendance at the RCSB Special Meeting
will not in itself constitute the revocation of a proxy.

       No Appraisal Rights. Holders of RCSB Common Stock are not entitled to
appraisal rights under the DGCL in connection with the Merger.

       Security Ownership. As of the RCSB Record Date, directors and executive
officers of RCSB and their affiliates were beneficial owners of 312,623 shares
(excluding shares underlying stock options), or 2.1% of the then outstanding
shares, of RCSB Common Stock. The directors of RCSB have entered into voting
agreements with Charter One (the "Charter One Voting Agreements") whereby such
directors have agreed to vote the shares of RCSB Common Stock owned or
controlled by them (158,615 shares in the aggregate) for adoption of the Merger
Agreement. Executive

                                        2


<PAGE>   15



officers of RCSB have also indicated their intention to vote the shares of RCSB
Common Stock owned or controlled by them (154,008 shares in the aggregate) for
adoption of the Merger Agreement.

       As of the RCSB Record Date, Charter One, directors and executive officers
of Charter One and their affiliates did not beneficially own any shares of RCSB
Common Stock.

       For additional information, see "THE SPECIAL MEETINGS -- RCSB Special
Meeting."

                            THE PARTIES TO THE MERGER

CHARTER ONE, CHARTER MICHIGAN AND CHARTER ONE BANK

       Charter One, a Delaware corporation, is the holding company for Charter
Michigan, a Michigan corporation, which is the holding company for Charter One
Bank, a federally chartered savings bank headquartered in Cleveland, Ohio. As of
March 31, 1997, Charter One had total consolidated assets of $14.0 billion,
deposits of $7.8 billion and stockholder's equity of $951.5 million. Charter
One's business has consisted primarily of the business of Charter One Bank and
its subsidiaries. The executive offices of Charter One are located at 1215
Superior Avenue, Cleveland, Ohio 44114, and the telephone number is (216)
589-8320.

       For additional information see "SUMMARY -- Selected Consolidated
Financial And Other Data of Charter One Financial, Inc.," "CHARTER ONE
FINANCIAL, INC., CHARTER MICHIGAN-BANCORP, INC. AND CHARTER ONE BANK, F.S.B."
and "UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS." Information concerning
Charter One, Charter Michigan and Charter One Bank is also included in the
Charter One documents incorporated by reference herein. See "INCORPORATION OF
CERTAIN DOCUMENTS BY REFERENCE."

RCSB AND ROCHESTER BANK

       RCSB, a Delaware corporation, is the holding company for Rochester Bank,
a New York chartered savings bank headquartered in Rochester, New York. As of
May 31, 1997, RCSB had total consolidated assets of $4.1 billion, deposits of
$2.3 billion and stockholders' equity of $312.6 million. RCSB's business has
consisted primarily of the business of Rochester Bank and its subsidiaries.
RCSB's executive offices are located at 235 East Main Street, Rochester, New
York 14604 and its telephone number is (716) 423-7370.

       For additional information see "SUMMARY -- Selected Consolidated
Financial and Other Data of RCSB," "RCSB FINANCIAL, INC. AND ROCHESTER COMMUNITY
SAVINGS BANK" and "UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS."
Information concerning RCSB and Rochester Bank is also included in the RCSB
documents incorporated by reference herein. See "INCORPORATION OF CERTAIN
DOCUMENTS BY REFERENCE."

                    SUMMARY OF CERTAIN ASPECTS OF THE MERGER

GENERAL

       The stockholders of Charter One and RCSB are each being asked to consider
and vote upon, among other things, a proposal to adopt the Merger Agreement
pursuant to which the Merger will be implemented by the combination of RCSB with
Charter Michigan, a first-tier subsidiary of Charter One in a "stock-for-stock
exchange" transaction. Upon consummation of the Merger, each outstanding share
of RCSB Common Stock, other than Excluded Shares, prior to the Effective Time
(as defined herein) will be converted into the right to receive .91 shares of
Charter One Common Stock, including the right to receive a corresponding number
of rights associated with the Charter One Common Stock pursuant to the Rights
Agreement. See "THE MERGER -- Merger Consideration." For a description of the
Rights Agreement, see "COMPARISON OF RIGHTS OF STOCKHOLDERS OF CHARTER ONE
FINANCIAL, INC. AND RCSB FINANCIAL, INC. -- Rights Agreements."

                                        3


<PAGE>   16



BACKGROUND OF AND REASONS FOR THE MERGER; RECOMMENDATIONS OF THE BOARDS OF
DIRECTORS

       Charter One. The Charter One Board has unanimously adopted the Merger
Agreement and approved the transactions contemplated thereby and has determined
that the Merger and the issuance of the shares of Charter One Common Stock
pursuant thereto are advisable and fair to, and in the best interests of,
Charter One and its stockholders. THE CHARTER ONE BOARD THEREFORE UNANIMOUSLY
RECOMMENDS A VOTE FOR ADOPTION OF THE MERGER AGREEMENT AT THE CHARTER ONE
SPECIAL MEETING. See "THE MERGER -- Opinion of Charter One's Financial Advisor."

       For a discussion of the factors considered by the Charter One Board in
reaching its decision to adopt the Merger Agreement and approve the transactions
contemplated thereby, see "THE MERGER--Background of and Reasons for the
Merger."

       RCSB. The RCSB Board has unanimously adopted the Merger Agreement and
approved the transactions contemplated thereby and has determined that the
Merger is advisable and fair to, and in the best interests of, RCSB and its
stockholders. THE RCSB BOARD THEREFORE UNANIMOUSLY RECOMMENDS THAT RCSB
STOCKHOLDERS VOTE FOR ADOPTION OF THE MERGER AGREEMENT AT THE RCSB SPECIAL
MEETING. See "THE MERGER -- Opinion of RCSB's Financial Advisor."

       For a discussion of the factors considered by the RCSB Board in reaching
its decision to adopt the Merger Agreement and approve the transactions
contemplated thereby, see "THE MERGER -- Background of and Reasons for the
Merger."

MERGER CONSIDERATION

       The Merger Agreement provides that at the Effective Time each issued and
outstanding share of RCSB Common Stock, other than Excluded Shares, will be
canceled and converted into .91 shares of Charter One Common Stock, including a
corresponding number of rights associated with Charter One Common Stock pursuant
to the Rights Agreement. For a discussion of the rights, see "COMPARISON OF
RIGHTS OF STOCKHOLDERS OF CHARTER ONE FINANCIAL, INC. AND RCSB FINANCIAL, INC.
- -- Rights Agreements."

       The Exchange Ratio has been fixed at .91. Based on the last reported sale
price for Charter One Common Stock on the Nasdaq National Market on August 18,
1997 ($52.00 per share), the value of .91 shares of Charter One Common Stock as
of that date would have been approximately $47.32. The last reported sale price
for RCSB Common Stock on the Nasdaq National Market on that date was $46.69 per
share. The maximum number of shares of Charter One Common Stock (assuming all
options for RCSB Common Stock are exercised) which may be issued in connection
with the Merger is 13,877,460 which would result in the existing RCSB
shareholders holding 22.6% of the merged entity on a fully diluted basis
(assuming approximately 1.4 million shares of Charter One Common Stock are
issued pursuant to the Haverfield Merger (as defined)). For a discussion of the
Haverfield Merger see "Recent Developments." The market value of Charter One
Common Stock to be received in the Merger, however, is subject to fluctuation.
Fluctuations in the market price of Charter One Common Stock would result in an
increase or decrease in the value of the Merger Consideration to be received by
RCSB stockholders in the Merger. An increase in the market value of Charter One
Common Stock would increase the market value of the Merger Consideration to be
paid in the Merger. A decrease in the market value of Charter One Common Stock
would have the opposite effect. The Merger Consideration was determined through
arm's-length negotiations between Charter One and RCSB, each of whom was advised
during such negotiations by its respective financial advisor. See "THE MERGER --
Background of and Reasons for the Merger."

TREATMENT OF RCSB STOCK OPTIONS

       As of the RCSB Record Date, there were options ("RCSB Stock Options")
outstanding with respect to 433,727 shares of RCSB Common Stock under the
Rochester Bank 1986 Stock Option Plan and the Rochester Bank 1992 Stock- Based
Compensation Plan (collectively, the "RCSB Option Plans"). The RCSB Option Plans
and each vested RCSB Stock Option outstanding thereunder as of the date of the
Merger Agreement (or required to be granted to non-employee directors on May 28,
1997) and remaining outstanding immediately prior to the Effective Time (as
defined below) shall,

                                        4


<PAGE>   17



at the Effective Time, be assumed by Charter One and shall represent an option
to purchase shares of Charter One Common Stock, upon the same terms and
conditions under the relevant vested option as were applicable immediately prior
to the Effective Time, except the number of shares of Charter One Common Stock
subject to such options and the exercise price per share will be proratably
adjusted as described in the Merger Agreement. Each unvested RCSB Stock Option
outstanding as of the date of the Merger Agreement that remains outstanding and
unvested immediately prior to the Effective Time shall, at the Effective Time,
be canceled and exchanged for Charter One Common Stock equal to the fair market
value of such unvested options. In addition, all stock appreciation rights
outstanding as of the date of the Merger Agreement (except those held by Messrs.
Simon and Pettinella) will be cancelled in exchange for cash. See "-- Interests
of Certain Persons in the Merger," "THE MERGER -- Treatment of RCSB Stock
Options" and "THE MERGER - Interests of Certain Persons in the Merger."

OPINION OF FINANCIAL ADVISORS

       Charter One. Montgomery Securities ("Montgomery") has delivered its
written opinion to the Charter One Board that, as of May 21, 1997, the
consideration to be paid by Charter One in the Merger is fair to Charter One and
its stockholders from a financial point of view. A copy of the Montgomery
opinion dated May 21, 1997 is attached to this Joint Proxy Statement/Prospectus
at Annex B and is incorporated by reference herein. For information on the
assumptions made, matters considered and limits of the review by Montgomery, see
"THE MERGER -- Opinion of Charter One's Financial Advisor."

       RCSB. Lehman Brothers Inc. ("Lehman Brothers") has delivered its written
opinion to the RCSB Board that, as of May 21, 1997 and confirmed as of a date
within 5 days of this Joint Proxy Statement/Prospectus, the Exchange Ratio is
fair, from a financial point of view, to the holders of RCSB Common Stock. A
copy of the Lehman Brothers opinion dated May 21, 1997 is attached to this Joint
Proxy Statement/Prospectus at Annex C and is incorporated by reference herein.
For information on the assumptions made, matters considered and limits of the
review by Lehman Brothers, see "THE MERGER -- Opinion of RCSB's Financial
Advisor."

EFFECTIVE TIME

       The Merger shall become effective at the time and on the date the
certificates of merger relating to the Merger are filed with the Secretary of
the State of Delaware and the Michigan Department of Commerce (the "Effective
Time"). Such filings will occur only after the receipt of all requisite
regulatory approvals, adoption of the Merger Agreement by the requisite vote of
Charter One's and RCSB's stockholders, and the satisfaction or waiver of all
other conditions to the Merger.

EXCHANGE OF CERTIFICATES; NO FRACTIONAL SHARES

       As soon as practicable after the Effective Time, Charter One will mail to
RCSB stockholders a transmittal letter and instructions to be used in
surrendering their RCSB Common Stock certificates for Charter One Common Stock
certificates as calculated pursuant to the Exchange Ratio. See "THE MERGER --
Exchange of Certificates; Lost Certificates." No fractional shares of Charter
One Common Stock will be issued in the Merger to holders of RCSB Common Stock.
Each holder of RCSB Common Stock who otherwise would have been entitled to a
fraction of a share of Charter One Common Stock shall receive a cash payment in
lieu thereof. See "THE MERGER -- Fractional Shares."

INTERESTS OF CERTAIN PERSONS IN THE MERGER

       Certain members of RCSB's management and the RCSB Board have interests in
the Merger in addition to their interests as stockholders of RCSB generally.
These interests relate to: (i) the election of four members of the RCSB Board,
Leonard S. Simon, Michael P. Morley, Ronald F. Poe and John P. Tierney, to the
Charter One, Charter Michigan and Charter One Bank Boards; (ii) a lump sum
payment of pension benefits to be made to the RCSB non-employee directors
($145,000 to each director with five or more years of service on the RCSB Board
and $72,000 to each director with less than five years of service on the RCSB
Board); (iii) the entering into employment agreements with Messrs. Simon and
Pettinella pursuant to which they will receive annual base salaries of $455,000
and $288,000 per year, respectively, together with other benefits applicable
generally to similarly situated officers; (iv) a change in control

                                        5


<PAGE>   18



payment to Mr. Simon in the amount of approximately $1.61 million and the
potential change in control/severance payments to other executive officers of
RCSB in the aggregate amount of approximately $2.4 million; (v) the assumption
by Charter One of the vested RCSB stock options on a basis that reflects the
Exchange Ratio and the cancellation of unvested RCSB stock options in exchange
for Charter One Common Stock equal to the fair market value of such unvested
stock options; and (vi) the continued indemnification by Charter One of the
former directors, officers and employees of RCSB and its subsidiaries following
consummation of the Merger. See "THE MERGER -- Interests of Certain Persons in
the Merger."

MANAGEMENT AFTER THE MERGER

       Certain directors and executive officers of RCSB will become directors
and executive officers of Charter One, Charter Michigan and Charter One Bank.
See "MANAGEMENT AND OPERATIONS AFTER THE MERGER."

REPRESENTATIONS AND WARRANTIES

       The Merger Agreement contains customary representations and warranties of
Charter One and Charter One Bank on the one hand, and RCSB and Rochester Bank on
the other hand. See "THE MERGER -- Representations and Warranties."

CONDITIONS TO THE MERGER

       The respective obligations of the parties to consummate the Merger are
subject to the satisfaction or waiver of certain conditions specified in the
Merger Agreement, including, among other things, the receipt of the requisite
regulatory and stockholder approvals, the accuracy of the representations and
warranties contained therein, the performance of all obligations imposed
thereby, the receipt by Charter One and RCSB of certain opinions and the
satisfaction of certain other conditions. See "THE MERGER -- Conditions to the
Merger."

REGULATORY APPROVALS

       Consummation of the Merger is subject to the approval of the Office of
Thrift Supervision (the "OTS") and the New York Superintendent of Banks (the
"New York Superintendent"). Although Charter One anticipates receiving approval
of the OTS and the New York Superintendent in the third quarter of 1997, there
can be no assurance as to the timing of such approvals or that they will be
obtained. Charter One filed an application for approval of the Merger with the
OTS and the New York Superintendent on July 11, 1997 and July 18, 1997,
respectively.

       The Merger may not be consummated for a period of 30 days after receipt
of the OTS's final approval, unless the OTS has not received any adverse comment
from the United States Department of Justice (the "Department of Justice")
during the first 15 days following final approval, in which case the Merger may
be consummated on or after the 15th day after final approval by the OTS. See
"THE MERGER -- Regulatory Approvals."

AMENDMENT; TERMINATION

       Subject to applicable law, the Merger Agreement may be amended by action
of the Charter One Board and RCSB Board at any time before or after approval of
the Merger by the stockholders of Charter One and RCSB; provided that, after
approval of the Merger by the stockholders of Charter One and RCSB, no amendment
may change the value or form of the Merger Consideration to be received by RCSB
stockholders in the Merger without the approval of the stockholders of both
companies. See "THE MERGER -- Amendment; Termination; Liabilities and Remedies
for Breach."

       The Merger Agreement may be terminated at any time prior to the Effective
Time, whether prior to or after approval of the matters presented herein by
Charter One and RCSB stockholders, either by mutual consent of the Charter One
Board and the RCSB Board in writing or by either party if, among other things,
(i) the required regulatory approvals are not obtained; (ii) the Merger is not
consummated by December 31, 1997; (iii) the other party has materially breached
any representation, warranty, covenant or agreement set forth in the Merger
Agreement and has failed to, or cannot, cure

                                        6


<PAGE>   19



in a timely manner such breach after receiving written notice of such breach, or
(iv) any event occurs which renders impossible the satisfaction in any material
respect of one or more of the conditions to the other party's obligations to
effect the Merger.

       In the event that the Merger Agreement is terminated by a party solely by
reason of a willful and material breach by the other party of any of its
representations or warranties, or a material breach by such other party of any
of its covenants or agreements contained in the Merger Agreement, then the
non-breaching party is entitled to seek such remedies and relief as are
available at law or in equity, including specific performance against the
breaching party. See "THE MERGER -- Amendment; Termination; Liabilities and
Remedies for Breach."

CONDUCT OF BUSINESS PENDING THE MERGER

       RCSB and Rochester Bank have agreed to certain covenants with respect to
the conduct of their businesses and other matters pending the closing of the
Merger. See "THE MERGER -- Conduct of Business Pending the Merger."

ACCOUNTING TREATMENT

       It is intended that the Merger will be accounted for as a "pooling of
interests" in accordance with generally accepted accounting principles. It is a
condition to the Merger that Charter One receive a letter from Deloitte & Touche
LLP to the effect that the Merger will qualify for pooling of interests
accounting treatment. Accordingly, upon consummation of the Merger, RCSB's
results of operations will be included in Charter One's consolidated results of
operations. See "THE MERGER -- Accounting Treatment" and "-- Conditions to the
Merger."

CERTAIN FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER

       It is a condition to the obligations of Charter One and RCSB to
consummate the Merger that they have received an opinion of Silver, Freedman &
Taff, L.L.P. to the effect that the Merger will be treated as a reorganization
within the meaning of Section 368(a) of the Internal Revenue Code of 1986, as
amended (the "Code") and that Charter One, Charter Michigan and RCSB will each
be a party to a reorganization. It is expected that for federal income tax
purposes no gain or loss will be recognized as a result of the Merger by Charter
One or RCSB or any RCSB stockholder upon receipt solely of Charter One Common
Stock in the Merger (except with respect to cash received by an RCSB stockholder
in lieu of a fractional share interest in Charter One Common Stock). RCSB
stockholders are urged to consult their tax advisors concerning the specific tax
consequences to them of the Merger, including the applicability and effect of
various state, local and foreign tax laws. See "THE MERGER - Certain Federal
Income Tax Consequences of the Merger" and "-- Conditions to the Merger."

EFFECTS OF THE MERGER ON STOCKHOLDERS

       As a result of the Merger, holders of RCSB Common Stock who receive
shares of Charter One Common Stock in the Merger will become stockholders of
Charter One. For a comparison of applicable law and the corporate charters and
bylaws of Charter One and RCSB governing the rights of Charter One and RCSB
stockholders, see "COMPARISON OF RIGHTS OF STOCKHOLDERS OF CHARTER ONE
FINANCIAL, INC. AND RCSB FINANCIAL, INC." For information regarding the
financial impact of the Merger to the respective stockholders of Charter One and
RCSB, see the combined financial condition of Charter One and RCSB upon the
consummation of the Merger, including unaudited pro forma per share data, under
"UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS" and "UNAUDITED PRO FORMA PER
SHARE DATA."

                             CERTAIN RELATED MATTERS

STOCK OPTION AGREEMENT

       In connection with the execution of the Merger Agreement, Charter One and
RCSB entered into the Stock Option Agreement, dated May 21, 1997 (the "Stock
Option Agreement"), pursuant to which RCSB has issued Charter One an option (the
"Option") to purchase up to 2,880,944 shares of RCSB Common Stock (or 19.9
percent of the

                                        7


<PAGE>   20



outstanding shares of RCSB Common Stock) at an exercise price of $37.50 per
share. The Option is exercisable only upon the occurrence of certain events and
provides Charter One the right, under certain circumstances to require RCSB to
purchase for cash the unexercised portion of the Option and all shares of RCSB
Common Stock purchased by Charter One pursuant thereto. The Option, which
Charter One required that RCSB grant as a condition to Charter One's entering
into the Merger Agreement, may increase the likelihood of consummation of the
Merger by discouraging competing offers for RCSB. Certain aspects of the Stock
Option Agreement may have the effect of discouraging persons who may now, or
prior to the Effective Time, be interested in acquiring all of or a significant
interest in RCSB from considering or proposing such an acquisition, even if such
persons were prepared to offer to pay consideration to stockholders of RCSB
which had a higher current market price than the per share Merger Consideration
to be received for each share of RCSB Common Stock pursuant to the Merger
Agreement.

       A copy of the Stock Option Agreement is attached to this Joint Proxy
Statement/Prospectus at Annex D. For additional information regarding the Stock
Option Agreement, see "CERTAIN RELATED MATTERS -- Stock Option Agreement."

THE BANK MERGER

               It is anticipated that simultaneously with the Merger, Rochester
Bank will be merged with and into Charter One Bank (the "Bank Merger"). The
respective obligations of Charter One Bank and Rochester Bank to consummate the
Bank Merger are conditioned upon consummation of the Merger.

                COMPARATIVE STOCK PRICES AND DIVIDEND INFORMATION

       Charter One Common Stock and RCSB Common Stock are traded on the Nasdaq
National Market (symbols: COFI and RCSB, respectively). The following table sets
forth the reported high and low sales prices of shares of Charter One Common
Stock and RCSB Common Stock, as reported on the Nasdaq National Market, and the
quarterly cash dividends per share declared, for the periods indicated. The
stock prices and dividend amounts have been restated to give effect to stock
splits and stock dividends. The stock prices do not include retail mark-ups,
mark-downs or commissions.

<TABLE>
<CAPTION>

                                                CHARTER ONE                              RCSB
                                                COMMON STOCK                        Common Stock(3)
                                      ---------------------------         ---------------------------------
                                      High         Low     Dividends     High          Low        Dividends
                                      ----         ---     ---------     ----          ---        ---------
<S>                                  <C>          <C>          <C>        <C>          <C>          <C> 
1995 FISCAL YEAR(1)
  First Quarter ...........          $21.08       $17.98       $.16       $19.00       $15.25       $.10
  Second Quarter ..........           25.71        19.05        .18        21.38        16.63        .10
  Third Quarter ...........           29.29        23.22        .18        25.13        19.00        .10
  Fourth Quarter ..........           31.79        26.79        .19        25.38        22.25        .12

1996 FISCAL YEAR(1)
  First Quarter ...........           33.57        27.14        .19        24.13        21.56        .12
  Second Quarter ..........           36.19        29.34        .22        24.25        22.50        .24(2)
  Third Quarter ...........           40.56        32.03        .22        27.75        23.75         --(2)
  Fourth Quarter ..........           44.75        38.13        .23        30.50        26.38        .15

1997 FISCAL YEAR(1)
  First Quarter ...........           50.13        41.13        .25        34.75        27.88        .15
  Second Quarter ..........           54.00        42.25        .25        41.13        29.63        .15
  Third Quarter ...........           58.13        51.50         --        51.75        41.06        .15
  (through August 18, 1997)
<FN>
- -----------

(1)    Charter One's quarters end March 31, June 30, September 30 and December
       31 for each year and RCSB's quarters end February 28, May 31, August 31
       and November 30 of each year.

(2)    To facilitate redemption of RCSB's preferred shares, declaration of the
       1996 third quarter common stock dividend was accelerated to May 1996, one
       month earlier than RCSB's usual timing.

(3)    Prices represent the high or low closing price, as applicable.
</TABLE>

                                        8


<PAGE>   21



       Nothing contained in the Merger Agreement will preclude RCSB from
declaring and paying cash dividends on RCSB Common Stock at a quarterly rate not
to exceed $.15 per share in a manner, on dates and with respect to record dates
consistent with past practice (except for the payment of the last dividend prior
to consummation of the Merger which shall be coordinated with and subject to the
prior approval of, Charter One to preclude any duplication of dividends). RCSB
shall not declare or pay any other dividends or make any other capital
distribution with respect to capital without the prior written consent of
Charter One. The RCSB Board is under no obligation to pay dividends on RCSB
Common Stock.

       The timing and amount of the future dividends of Charter One will depend
upon earnings, cash requirements, Charter One's financial condition and other
factors deemed relevant by the Charter One Board. Dividends may also be limited
by certain regulatory restrictions.

       The following table sets forth the last reported sale prices per share of
Charter One Common Stock and RCSB Common Stock and the equivalent per share
price for RCSB Common Stock giving effect to the Merger on (i) May 20, 1997, the
last trading day preceding public announcement of the signing of the Merger
Agreement; and (ii) August 18, 1997, the last practicable date prior to the
mailing of this Joint Proxy Statement/Prospectus.
<TABLE>
<CAPTION>

                                                           Charter One           RCSB          EQUIVALENT PRICE PER
                                                          Common Stock       Common Stock         RCSB SHARE (1)
                                                          ------------       ------------         --------------

<S>                                                          <C>                <C>                  <C>   
May 20, 1997............................................     $46.50             $34.75               $42.32
August 18, 1997.........................................     $52.00             $46.69               $47.32
<FN>

- ---------------

(1)    The equivalent price per RCSB share at each specified date represents the
       closing market price of a share of Charter One Common Stock on that date
       multiplied by the Exchange Ratio of .91. See "THE MERGER-- Merger
       Consideration."
</TABLE>

       As of August 18, 1997, the 46,249,711 outstanding shares of Charter One
Common Stock were held by approximately 7,237 record owners and the 14,816,228
outstanding shares of RCSB Common Stock were held by approximately 4,188 record
owners.

       RCSB stockholders are advised to obtain current market quotations for
Charter One Common Stock. The market price of Charter One Common Stock may
fluctuate between the date of this Joint Proxy Statement/Prospectus and the
Effective Time. Fluctuations in the market price of Charter One Common Stock
will result in an increase or decrease in the value of the Merger Consideration
to be received by holders of RCSB Common Stock in the Merger. An increase in the
market value of Charter One Common Stock will increase the market value of the
Merger Consideration to be received in the Merger. A decrease in the market
value of Charter One Common Stock will have the opposite effect. The market
value of the Merger Consideration at the time of the Merger will depend upon the
market value of a share of Charter One Common Stock at such time. No assurance
can be given concerning the market price of Charter One Common Stock before or
after the Effective Time. See "THE MERGER -- Merger Consideration."

                                        9


<PAGE>   22



  SELECTED CONSOLIDATED FINANCIAL AND OTHER DATA OF CHARTER ONE FINANCIAL, INC.

<TABLE>
<CAPTION>

                                                     AT AND FOR THE THREE
                                                     MONTHS ENDED MARCH 31,      
                                                    ------------------------      
                                                          1997          1996    
                                                          ----          ----    
<S>                                                  <C>           <C>          
OPERATING DATA:
   Interest income ...............................   $   255,793   $   243,048  
   Interest expense ..............................       158,267       151,046  
                                                     -----------   -----------  
      Net interest income ........................        97,526        92,002  
   Provision for loan and lease losses ...........           220         1,000  
                                                     -----------   -----------  
      Net interest income after provision for loan
       and lease losses ..........................        97,306        91,002  
   Other income:
      Net (loss)(1) gain .........................            87           577  
      Other ......................................        15,094        11,262  
   Administrative expenses(2) ....................        46,697        44,583  
                                                     -----------   -----------  
      Income before federal income taxes,
         extraordinary item and cumulative effect

         of change in accounting principle .......        65,790        58,258  
   Federal income taxes ..........................        21,704        19,808  
                                                     -----------   -----------  
      Income before extraordinary item and
         cumulative effect of change in
         accounting principle ....................        44,086        38,450  
   Extraordinary item - early extinguishment of
      debt, net of tax benefit of $6,361 .........          --            --    
   Cumulative effect of change in accounting
      principle(3) ...............................          --            --    
                                                     -----------   -----------  
      Net income .................................   $    44,806   $    38,450  
                                                     ===========   ===========  
 PER SHARE DATA:
   Earnings per common and common
      equivalent share(4):
      Income before extraordinary item and
        cumulative effect of change in accounting
        principle ................................  $       .93   $       .80   
   Extraordinary item ............................
      Early extinguishment of debt, net of tax
           benefit of $6,361 .....................          --            --    
      Cumulative effect of change in accounting
         principle ...............................          --            --    
                                                    -----------   -----------   
      Net income .................................  $       .93   $       .80   
                                                    ===========   ===========   
   Dividends declared and paid per common
      share(5) ...................................  $       .23   $       .19   

FINANCIAL CONDITION:

   Total assets ..................................   $14,031,588   $13,167,893  
   Mortgage-backed securities ....................     4,564,928     5,082,153  
   Other investment securities ...................       281,448       236,489  
   Loans and Leases, net .........................     8,472,041     7,053,473  
   Deposits ......................................     7,839,479     7,010,797  
   FHLB Advances and other borrowings ............     5,028,856     5,059,375  
   Stockholders' equity ..........................       945,767       905,471  

OTHER PERIOD-END DATA:
   Number of full service offices ................           174           155  
   Number of loan origination offices ............             9             9  

<CAPTION>
                                                                    AT AND FOR THE YEAR ENDED DECEMBER 31,(1)                
                                                        -------------------------------------------------------------------- 
                                                        1996            1995            1994          1993           1992    
                                                        ----            ----            ----          ----           ----    
                                                                                                                             
                                                        (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)                        
<S>                                                 <C>           <C>             <C>             <C>           <C>          
OPERATING DATA:                                                                                                              
   Interest income ...............................  $ 1,004,478   $  1,087,410    $  1,006,180    $ 1,082,156   $ 1,131,758  
   Interest expense ..............................      621,086        769,594         694,207        774,762       884,752  
                                                    ------------    ------------    -----------   -----------   -----------  
      Net interest income ........................      383,392        317,816         311,973        307,394       247,006  
   Provision for loan and lease losses ...........        4,001          1,032           2,948          7,549        12,544  
                                                    ------------    ------------    -----------   -----------   -----------  
      Net interest income after provision for loan                                                                           
       and lease losses ..........................      379,391        316,784         309,025        299,845       234,462  
   Other income:                                                                                                             
      Net (loss)(1) gain .........................        1,893        (92,303)       (145,786)         6,832        25,078  
      Other ......................................       55,245         44,467          35,397         33,027        28,414  
   Administrative expenses(2) ....................      244,024        215,743         175,961        178,889       167,516  
                                                    ------------    ------------    -----------   -----------   -----------  
      Income before federal income taxes,                                                                                    
         extraordinary item and cumulative effect                                                                            
                                                                                                                             
         of change in accounting principle .......      192,505         53,205          22,675        160,815       120,438  
   Federal income taxes ..........................       64,783         19,173           7,056         56,415        42,270  
                                                    ------------    ------------    -----------   -----------   -----------  
      Income before extraordinary item and                                                                                   
         cumulative effect of change in                                                                                      
         accounting principle ....................      127,722         34,032          15,619        104,400        78,168  
   Extraordinary item - early extinguishment of                                                                              
      debt, net of tax benefit of $6,361 .........         --             --           (12,348)          --            --    
   Cumulative effect of change in accounting                                                                                 
      principle(3) ...............................         --             --              --             --          14,825  
                                                    ------------    ------------    -----------   -----------   -----------  
      Net income .................................  $   127,722   $     34,032    $      3,271    $   104,400   $    92,993  
                                                    ============    ============    ===========   ===========  ============  
PER SHARE DATA:                                                                                                     
   Earnings per common and common                                                                                            
      equivalent share(4):                                                                                                   
      Income before extraordinary item and                                                                             
        cumulative effect of change in accounting                                                                            
        principle ................................ $       2.67    $        .71    $       .32   $      2.18   $   1.87      
   Extraordinary item ............................                                                                           
      Early extinguishment of debt, net of tax                                                                               
           benefit of $6,361 .....................         --             --              (.26)          --            --    
      Cumulative effect of change in accounting                                                                              
         principle ...............................         --             --              --             --         .35      
                                                   ------------    ------------    -----------   -----------   -----------   
      Net income ................................. $       2.67    $        .71    $       .06   $      2.18   $   2.22      
                                                   ============    ============    ===========   ===========   ===========   
   Dividends declared and paid per common                                                                                    
      share(5) ................................... $        .86    $       . 71    $       .56   $       .40   $    .30      
                                                                                                                             
FINANCIAL CONDITION:                                                                                                         
                                                                                                                             
   Total assets ..................................  $13,893,841   $ 13,558,361    $ 14,522,180    $14,447,508   $13,634,860  
   Mortgage-backed securities ....................    4,704,074      5,314,749       6,628,591      6,718,615     5,946,949  
   Other investment securities ...................      243,632        407,427         467,247        428,579       687,285  
   Loans and Leases, net .........................    8,100,342      6,678,600       6,592,975      6,562,088     6,234,954  
   Deposits ......................................    7,841,197      7,012,491       7,089,153      7,280,125     7,088,649  
   FHLB Advances and other borrowings ............    4,955,291      5,461,684       6,383,595      6,009,255     5,478,732  
   Stockholders' equity ..........................      921,724        884,873         823,671        902,239       733,851  
                                                                                                                             
OTHER PERIOD-END DATA:                                                                                                       
   Number of full service offices ................          172            155             157            170           173  
   Number of loan origination offices ............            9              9               6              3             4  
                                                   
</TABLE>




                                       10


<PAGE>   23
<TABLE>
<CAPTION>



                                                                  AT AND FOR THE THREE
                                                                  MONTHS ENDED MARCH 31,   AT AND FOR THE YEAR ENDED DECEMBER 31,(1)
                                                                  ---------------------   -----------------------------------------

                                                                    1997      1996        1996    1995     1994    1993    1992
                                                                  -------   -------      ------  ------   ------  ------  ------
                                                                                  (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                                  <C>      <C>         <C>      <C>      <C>      <C>      <C>  
SELECTED RATIOS:
   Net yield on average interest-earning assets
   for the period ...............................................    2.88%    2.92%       2.92%    2.23%    2.24%    2.18%    1.86%
Return on average stockholders' equity ..........................   18.67    17.18       13.89     3.93      .39    12.28    13.49
Return on average stockholders' equity (prior
   to SAIF assessment, restructuring, merger
   related charges and cumulative effect of
   change in accounting principle, net) .........................   18.67    17.18       17.93    14.61    14.02    12.28    11.34
Return on average assets ........................................    1.26     1.19         .94      .23      .02      .72      .68
Return on average assets (prior to SAIF assessment,
   restructuring, merger related charges and cumulative effect
   of change in accounting principle, net) ......................    1.26     1.19        1.22      .86      .82      .72      .57
Average stockholders' equity to average
   assets .......................................................    6.77     6.92        6.80     5.91     5.84     5.84     5.01
<FN>

- -------------------------------

(1)   1995 includes $101.8 million of merger-related costs, $66.1 million after
      tax. 1994 includes $152.8 million in restructuring charges, $100.9 million
      after tax.

(2)   1996 includes $56.3 million from special SAIF assessment. 1995 includes
      $37.5 million of merger expenses.

(3)   During 1992, the Company changed its method of accounting for income taxes
      by adopting Statement of Financial Accounting Standards ("SFAS") No. 109,
      "Accounting for Income Taxes."

(4)   All historical earnings per share have been restated to reflect the 5%
      stock dividend issued on September 30, 1996. During 1995 and 1992, the
      Company completed mergers which were accounted for as pooling of
      interests.

(5)   The amounts presented herein are historical per share amounts declared and
      paid by the Company, as adjusted for stock splits and stock dividend. No
      adjustment has been made for mergers accounted for as pooling of
      interests.
</TABLE>

                                       11


<PAGE>   24



     SELECTED CONSOLIDATED FINANCIAL AND OTHER DATA OF RCSB FINANCIAL, INC.

<TABLE>
<CAPTION>

                                                     At and For the Six
                                                         Months Ended     
                                                     -------------------  
                                                     May 31,     May 31,
                                                      1997         1996   
                                                    -------      -------  
                                                                          
<S>                                              <C>           <C>        
OPERATING RESULTS:
   Net interest income                           $    65,602   $   64,732 
   Provision for loan losses                           8,092        6,220 
                                                 -----------   ---------- 
     Net interest income after loan provision         57,510       58,512 

  Noninterest income:
     Mortgage banking                                 29,917       22,389 
     Retail banking                                    3,871        5,075 
     Automobile loan banking                             113        1,585 
     Net securities sale gains                            85          995 
     Gain on sale of subsidiary                         --           --   
     Other                                              (296)          66 
                                                 -----------   ---------- 
        Total noninterest income                      33,690       30,110 
                                                 -----------   ---------- 
  Operating expenses                                  62,743       59,132 
                                                 -----------   ---------- 
  Income (loss) before taxes                          28,457       29,490 
  Income tax provision (benefit)                      10,529       10,322 
                                                 -----------   ---------- 
  Net income (loss)                              $    17,928   $   19,168 
                                                 ===========   ========== 

 PER COMMON SHARE:
  Net Income (loss):
     Primary                                     $      1.18   $     1.24 
     Fully diluted                                      1.18         1.07 
  Cash dividends declared                               0.30         0.36 
  Book value (fully diluted)                           21.42        20.47 

PERFORMANCE RATIOS:
  Net interest margin                                   3.51%        3.51%
  Interest rate spread                                  3.31         3.12 
  Equity as a percentage of assets:  Average            7.76         9.17 
  Equity as a percentage of assets:  Period end         7.62         8.63 
  Dividend payout ratio                                25.42        29.03 
  Return on average assets                              0.89         0.97 
  Return on average equity                             11.48        10.58 

ASSET QUALITY RATIOS:
  Percent of assets nonperforming                       0.76%        0.78%
  Percent of loans nonperforming                        1.14         1.26 
  Allowance for loan losses as percent of:

     Nonperforming loans                              104.18       102.68 
     Nonperforming assets                              83.90        85.48 

AVERAGE BALANCES:
  Assets                                         $ 4,026,340   $3,950,386 
  Interest-earning assets                          3,740,645    3,690,306 
  Interest-bearing liabilities                     3,596,468    3,390,631 
  Stockholders' equity                               312,341      362,311 

PERIOD-END BALANCES:
  Assets                                         $ 4,104,367   $4,048,684 
  Securities available for sale                       18,171       20,100 
  Securities held to maturity                      1,544,612    1,618,016 
  Loans receivable, net                            2,196,707    2,041,635 
  Nonperforming assets                                31,392       31,429 
  Allowance for loan losses                           26,337       26,867 
  Goodwill and core deposit premium                    7,545        9,462 

  Deposits                                         2,342,879    2,337,884 
  Borrowings                                       1,226,097    1,121,392 
  Shareholders' equity                               312,577      349,590 
  Common shares outstanding, Net of treasury shares   14,951       12,409 
  Preferred shares outstanding                          --          2,989 

<CAPTION>
                                                 
                                                                   At and For the Year Ended November 30,               
                                                     --------------------------------------------------------------------
                                                                                                                           
                                                        1996         1995           1994         1993             1992     
                                                     --------       ------        -------       ------           -----     
                                                      (Dollars and shares in thousands, except per share amounts)          
<S>                                                  <C>           <C>           <C>           <C>             <C>         
OPERATING RESULTS:                                                                                                         
   Net interest income                               $  129,381    $  123,563    $  127,497    $   110,793     $   92,677  
   Provision for loan losses                             13,548         7,632        16,096         13,031         14,361  
                                                     ----------    ----------    ----------    -----------     ----------  
     Net interest income after loan provision           115,833       115,931       111,401         97,762         78,316  
                                                                                                                           
  Noninterest income:                                                                                                      
     Mortgage banking                                    49,709        35,883        40,175         67,644         57,845  
     Retail banking                                       9,763         9,704        14,975         19,470         17,266  
     Automobile loan banking                              3,693         2,402         2,376         (3,829)         6,707  
     Net securities sale gains                            1,900           354         3,830          3,128         21,319  
     Gain on sale of subsidiary                            --            --          23,294           --             --    
     Other                                                   94           121            95             78          4,996  
                                                     ----------    ----------    ----------    -----------     ----------  
        Total noninterest income                         65,159        48,464        84,745         86,491        108,133  
                                                     ----------    ----------    ----------    -----------     ----------  
  Operating expenses                                    123,442       114,058       140,397        247,560        167,610  
                                                     ----------    ----------    ----------    -----------     ----------  
  Income (loss) before taxes                             57,550        50,337        55,749        (63,307)        18,839  
  Income tax provision (benefit)                         17,845        12,584        11,429         (3,881)         7,790  
                                                     ----------    ----------    ----------    -----------     ----------  
  Net income (loss)                                  $   39,705    $   37,753    $   44,320    $   (59,426)    $   11,049  
                                                     ==========    ==========    ==========    ===========     ==========  
                                                                                                                           
 PER COMMON SHARE:                                                                                                         
  Net Income (loss):                                                                                                       
     Primary                                         $     2.67    $     2.32    $     2.81    $     (4.50)    $     0.80  
     Fully diluted                                         2.36          2.02          2.39          (4.50)          0.80  
  Cash dividends declared                                  0.51          0.42          0.10           --             --    
  Book value (fully diluted)                              21.12         20.11         18.62          16.85          21.82  
                                                                                                                           
PERFORMANCE RATIOS:                                                                                                        
  Net interest margin                                      3.50%         3.64%         3.56%          3.32%          2.77% 
  Interest rate spread                                     3.19          3.26          3.34           3.32           2.95  
  Equity as a percentage of assets:  Average               8.65          9.96          8.55           8.19           7.63  
  Equity as a percentage of assets:  Period end            8.07          9.71         10.13           7.46           7.87  
  Dividend payout ratio                                   19.10         18.10          3.56           --             --    
  Return on average assets                                 1.00          1.04          1.15          (1.58)          0.29  
  Return on average equity                                11.55         10.48         13.48         (19.30)          3.74  
                                                                                                                           
ASSET QUALITY RATIOS:                                                                                                      
  Percent of assets nonperforming                          0.76%         0.73%         0.83%          2.33%          7.33% 
  Percent of loans nonperforming                           1.18          1.23          1.22           1.89           4.44  
  Allowance for loan losses as percent of:                                                                                 
                                                                                                                           
     Nonperforming loans                                 116.71        106.59        113.94          53.35          34.62  
     Nonperforming assets                                 92.84         91.73         92.00          26.66          13.57  
                                                                                                                           
AVERAGE BALANCES:                                                                                                          
  Assets                                             $3,975,272    $3,618,160    $3,843,784    $ 3,759,073     $3,874,195  
  Interest-earning assets                             3,701,116     3,397,947     3,583,449      3,335,092      3,345,093  
  Interest-bearing liabilities                        3,468,004     3,130,855     3,383,214      3,333,676      3,454,599  
  Stockholders' equity                                  343,789       360,218       328,750        307,925        295,532  
                                                                                                                           
PERIOD-END BALANCES:                                                                                                       
  Assets                                             $4,014,317    $3,871,440    $3,426,042    $ 4,189,258     $3,829,312  
  Securities available for sale                          18,797        84,128         4,874        270,220        169,615  
  Securities held to maturity                         1,639,021     1,398,067     1,287,512        890,128        571,932  
  Loans receivable, net                               2,020,671     1,971,020     1,856,550      2,549,606      2,438,070  
  Nonperforming assets                                   30,365        28,443        28,505         97,545        280,557  
  Allowance for loan losses                              28,190        26,091        26,225         26,001         38,083  
  Goodwill and core deposit premium                       8,445        10,477        12,517         16,113         19,035  
                                                                                                                           
  Deposits                                            2,368,650     2,222,970     2,076,814      2,690,099      2,759,745  
  Borrowings                                          1,107,855       969,440       836,939        879,201        565,453  
  Shareholders' equity                                  323,863       375,927       346,999        312,312        301,401  
  Common shares outstanding, Net of treasury shares      15,331        14,023        13,966         13,862         13,816  
  Preferred shares outstanding                             --           2,989         2,990          2,990           --    
                                                   

</TABLE>



                                       12


<PAGE>   25



                              THE SPECIAL MEETINGS

       This Joint Proxy Statement/Prospectus and the accompanying form of proxy
are being furnished to the stockholders of Charter One and RCSB in connection
with the solicitation of proxies by the Charter One Board and the RCSB Board,
respectively, for use at the Special Meetings and at any adjournment or
postponement thereof.

CHARTER ONE SPECIAL MEETING

       Time and Date; Record Date. The Charter One Special Meeting will be held
at the Forum Conference and Education Center, One Cleveland Center, 1375 East
Ninth Street, Cleveland, Ohio, on Friday, October 3, 1997 at 10:30 a.m., local
time. This Joint Proxy Statement/Prospectus is being sent to holders of record
of Charter One Common Stock as of the Charter One Record Date, and is
accompanied by a form of proxy which the Charter One Board requests that
stockholders execute and return to Charter One for use at the Charter One
Special Meeting and at any and all adjournments or postponements thereof.

       The Charter One Board has fixed the Charter One Record Date as of the
close of business on August 18, 1997 as the time for determining holders of
Charter One Common Stock who are entitled to notice of and to vote at the
Charter One Special Meeting. Only holders of record of Charter One Common Stock
on the Charter One Record Date will be entitled to notice of and to vote at the
Charter One Special Meeting. As of the Charter One Record Date, there were
outstanding and entitled to vote at the Charter One Special Meeting 46,249,711
shares of Charter One Common Stock.

       Matters to Be Considered. At the Charter One Special Meeting, holders of
Charter One Common Stock will vote to approve proposals to adopt (i) the Merger
Agreement and (ii) the Amendment. Holders of Charter One Common Stock also may
consider and vote upon such other matters as are properly brought before the
Charter One Special Meeting, including proposals to adjourn the Charter One
Special Meeting to permit further solicitation of proxies by the Charter One
Board in the event these are not sufficient votes to adopt the Merger Agreement
or the Amendment at the time of the Charter One Special Meeting; provided,
however, that no proxy which is voted against the Merger Agreement or Amendment
will be voted in favor of adjournment to solicit further proxies for such
proposal. As    of the date hereof, the Charter One Board knows of no business
that will be presented for consideration at the Charter One Special Meeting,
other than the matters described in this Joint Proxy Statement/Prospectus.

       THE CHARTER ONE BOARD UNANIMOUSLY RECOMMENDS THAT CHARTER ONE
STOCKHOLDERS VOTE FOR ADOPTION OF THE MERGER AGREEMENT AND THE AMENDMENT.

       Voting Rights; Vote Required. Each holder of record of Charter One Common
Stock on the Charter One Record Date will be entitled to cast one vote for each
share registered in his, her, or its name on each matter presented for a vote of
the stockholders at the Charter One Special Meeting. Such vote may be exercised
in person or by a properly executed proxy. See "-- Proxy Solicitation" below.
Adoption of the Merger Agreement at the Charter One Special Meeting will require
the affirmative vote of the holders of a majority of the outstanding shares of
Charter One Common Stock entitled to vote at the Charter One Special Meeting.
Adoption of the Amendment will require the affirmative vote of the holders of 75
percent of the outstanding shares of Charter One Common Stock entitled to vote
at the Charter One Special Meeting. For purposes of counting votes on these
proposals, failures to vote, abstentions and broker non-votes (i.e., proxies
from brokers or nominees indicating that such persons have not received
instructions from the beneficial owners or other persons as to certain proposals
on which such beneficial owners or persons are entitled to vote their shares but
with respect to which the brokers or nominees have no discretionary power to
vote without such instructions) will have the same effect as votes against the
Merger Agreement and the Amendment. Adoption of the Merger Agreement by the
stockholders of Charter One is a condition to, and required for, consummation of
the Merger. Adoption of the Merger Agreement is not conditioned upon stockholder
adoption of the Amendment, and adoption of the Amendment is not conditioned upon
stockholder adoption of the Merger Agreement. See "THE MERGER -- Conditions to
the Merger."

       The affirmative vote of a majority of shares represented at the Charter
One Special Meeting may authorize the adjournment of the meeting.

                                       13


<PAGE>   26




       As of the Charter One Record Date, Charter One directors and executive
officers and their affiliates beneficially owned 3,065,630 shares (excluding
options underlying 1,145,695 shares of Charter One Common Stock), or 6.6% of the
outstanding shares, of Charter One Common Stock entitled to vote at the Charter
One Special Meeting. The directors and executive officers of Charter One have
indicated their intention to vote for approval of the proposals. Accordingly,
assuming such shares are so voted and the shares owned by the Charter One Bank
Employee Stock Ownership Plan are voted in favor of the adoption of the Merger
Agreement and the Amendment, adoption of the Merger Agreement and the Amendment
will require the affirmative vote of the holders of approximately an additional
40.6 percent and 65.6 percent, respectively, of the outstanding shares of
Charter One Common Stock entitled to vote at the Charter One Special Meeting.
See "CHARTER ONE FINANCIAL, INC., CHARTER-MICHIGAN BANCORP, INC. AND CHARTER ONE
BANK, F.S.B. --Beneficial Ownership of Certain Persons."

       As of the Charter One Record Date, RCSB, RCSB's directors and executive
officers and their affiliates did not own any shares of Charter One Common
Stock.

       Proxies and Proxy Solicitation. If a Charter One stockholder properly
executes and returns a proxy in the form distributed by Charter One, the proxies
named will vote the shares represented by that proxy at the Charter One Special
Meeting. Where a stockholder specifies a choice, the proxy will be voted in
accordance with the stockholder's specification. If no specific direction is
given, the proxies will vote the shares in favor of adoption of the Merger
Agreement and the Amendment. If other matters are presented, the shares for
which proxies have been received will be voted in accordance with the discretion
of the proxies.

       The affirmative vote of a majority of the shares represented at the
Charter One Special Meeting may authorize the adjournment of the Charter One
Special Meeting; provided, however, that no proxy which is voted against the
Merger Agreement or the Amendment will be voted in favor of adjournment to
solicit further proxies for such proposal.

       Any proxy given pursuant to this solicitation or otherwise may be revoked
by the person giving it at any time before it is voted by delivering to the
Secretary of Charter One at 1215 Superior Avenue, Cleveland, Ohio, 44114, on or
before the taking of the vote at the Charter One Special Meeting, a written
notice of revocation bearing a later date than the proxy or a later dated proxy
relating to the same shares of Charter One Common Stock or by attending the
Charter One Special Meeting and voting in person. Attendance at the Charter One
Special Meeting will not in itself constitute the revocation of a proxy.

       In addition to solicitation by mail, directors, officers, and employees
of Charter One, who will not be specifically compensated for such services, may
solicit proxies from the stockholders of Charter One, personally or by
telephone, telegram or other forms of communication. Brokerage houses, nominees,
fiduciaries and other custodians will be requested to forward soliciting
materials to beneficial owners and will be reimbursed for their reasonable
expenses incurred in sending proxy material to beneficial owners. In addition,
Charter One has engaged Georgeson & Company, Inc. ("Georgeson") to assist
Charter One in distributing proxy materials and contacting record and beneficial
owners of Charter One Common Stock. Charter One has agreed to pay Georgeson a
fee of $8,000 plus out-of-pocket expenses for its services to be rendered on
behalf of Charter One. Charter One will bear its own expenses in connection with
the solicitation of proxies for the Charter One Special Meeting. See "THE
MERGER--Expenses."

       HOLDERS OF CHARTER ONE COMMON STOCK ARE REQUESTED TO COMPLETE, DATE AND
SIGN THE ACCOMPANYING FORM OF PROXY AND TO RETURN IT PROMPTLY TO CHARTER ONE IN
THE ENCLOSED POSTAGE-PAID ENVELOPE.

RCSB SPECIAL MEETING

       Time and Date; Record Date. The RCSB Special Meeting will be held at the
Hyatt Regency Hotel, 125 East Main Street, Rochester, New York, on Friday,
October 3, 1997 at 10:30 a.m., local time. This Joint Proxy Statement/Prospectus
is being sent to holders of record of RCSB Common Stock as of the RCSB Record
Date, and is accompanied by a form of proxy which the RCSB Board requests that
stockholders execute and return to RCSB for use at the RCSB Special Meeting and
at any and all adjournments or postponements thereof.

                                       14


<PAGE>   27



       The RCSB Board has fixed the RCSB Record Date as of the close of business
on August 18, 1997 as the time for determining holders of RCSB Common Stock who
are entitled to notice of and to vote at the RCSB Special Meeting. Only holders
of record of RCSB Common Stock on the RCSB Record Date will be entitled to
notice of and to vote at the RCSB Special Meeting. As of the RCSB Record Date,
there were outstanding and entitled to vote at the RCSB Special Meeting
14,816,228 shares of RCSB Common Stock.

       Matters to Be Considered. At the RCSB Special Meeting, holders of RCSB
Common Stock will consider and vote upon a proposal to adopt the Merger
Agreement. Holders of RCSB Common Stock also may consider and vote upon such
other matters as are properly brought before the RCSB Special Meeting, including
proposals to adjourn the RCSB Special Meeting to permit further solicitation of
proxies by the RCSB Board in the event that there are not sufficient votes to
adopt the Merger Agreement at the time of the RCSB Special Meeting; provided,
however, that no proxy which is voted against the Merger Agreement will be voted
in favor of adjournment to solicit further proxies for such proposal. As of the
date hereof, the RCSB Board knows of no business that will be presented for
consideration at the RCSB Special Meeting, other than the matters described in
this Joint Proxy Statement/Prospectus.

       THE RCSB BOARD UNANIMOUSLY RECOMMENDS THAT YOU VOTE FOR ADOPTION OF THE
MERGER AGREEMENT.

       Voting Rights; Vote Required. Each holder of record of RCSB Common Stock
on the RCSB Record Date will be entitled to cast one vote for each share
registered in his, her, or its name on each matter presented for a vote of the
stockholders at the RCSB Special Meeting. Such vote may be exercised in person
or by a properly executed proxy. See "-- Proxy Solicitation" below. Approval of
the Merger Agreement at the RCSB Special Meeting will require the affirmative
vote of the holders of a majority of the outstanding shares of RCSB Common Stock
entitled to vote at the RCSB Special Meeting. For purposes of counting votes on
this proposal, failures to vote, abstentions and broker non-votes (i.e.,
proxies from brokers or nominees indicating that such persons have not received
instructions from the beneficial owners or other persons as to certain proposals
on which such beneficial owners or persons are entitled to vote their shares but
with respect to which the brokers or nominees have no discretionary power to
vote without such instructions) will have the same effect as votes against the
Merger Agreement. Adoption of the Merger Agreement by the stockholders of RCSB
is a condition to, and required for, consummation of the Merger. See "THE MERGER
- -- Conditions to the Merger."

       The affirmative vote of a majority of shares represented at the RCSB
Special Meeting may authorize the adjournment of the meeting.

       As of the RCSB Record Date, RCSB directors and executive officers and
their affiliates beneficially owned 312,623 shares (excluding options underlying
383,338 shares of RCSB Common Stock) or 2.1 percent of the outstanding shares,
of RCSB Common Stock entitled to vote at the RCSB Special Meeting. In accordance
with the Charter One Voting Agreements, the directors of RCSB have agreed to
vote the shares of RCSB Common Stock owned or controlled by them (158,615
shares) for the Merger Agreement. The executive officers of RCSB have indicated
that they also intend to vote all shares of RCSB Common Stock owned by them
(154,008 shares) for the Merger Agreement. Accordingly, assuming such shares are
so voted and the shares owned by the Rochester Bank Employee Investment and
Stock Ownership Plan are voted in favor of the Merger Agreement, adoption of the
Merger Agreement will require the affirmative vote of the holders of
approximately an additional 45.0 percent of the outstanding shares of RCSB
Common Stock entitled to vote at the RCSB Special Meeting. See "RCSB FINANCIAL,
INC. AND ROCHESTER COMMUNITY SAVINGS BANK-- Beneficial Ownership of Certain
Persons."

       As of the RCSB Record Date, Charter One, Charter One's directors and
executive officers and their affiliates did not own any shares of RCSB Common
Stock.

       Proxies and Proxy Solicitation. If a RCSB stockholder properly executes
and returns a proxy in the form distributed by RCSB, the proxies named will vote
the shares represented by that proxy at the RCSB Special Meeting. Where a
stockholder specifies a choice, the proxy will be voted in accordance with the
stockholder's specification. If no specific direction is given, the proxies will
vote the shares in favor of adoption of the Merger Agreement. If other

                                       15


<PAGE>   28



matters are presented, the shares for which proxies have been received will be
voted in accordance with the discretion of the proxies.

       The affirmative vote of a majority of the shares represented at the RCSB
Special Meeting may authorize the adjournment of the RCSB Special Meeting;
provided, however, that no proxy which is voted against the Merger Agreement
will be voted in favor of adjournment to solicit further proxies for such
proposal.

       Any proxy given pursuant to this solicitation or otherwise may be revoked
by the person giving it at any time before it is voted by delivering to the
Secretary of RCSB at 235 East Main Street, Rochester, New York, 14604, on or
before the taking of the vote at the RCSB Special Meeting, a written notice of
revocation bearing a later date than the proxy or a later dated proxy relating
to the same shares of RCSB Common Stock or by attending the RCSB Special Meeting
and voting in person. Attendance at the RCSB Special Meeting will not in itself
constitute the revocation of a proxy.

       In addition to solicitation by mail, directors, officers, and employees
of RCSB, who will not be specifically compensated for such services, may solicit
proxies from the stockholders of RCSB, personally or by telephone, telegram or
other forms of communication. Brokerage houses, nominees, fiduciaries and other
custodians will be requested to forward soliciting materials to beneficial
owners and will be reimbursed for their reasonable expenses incurred in sending
proxy material to beneficial owners. In addition, RCSB has engaged Georgeson to
assist RCSB in distributing proxy materials and contacting record and beneficial
owners of RCSB Common Stock. RCSB has agreed to pay Georgeson a fee of $6,000
plus out-of-pocket expenses for its services to be rendered on behalf of RCSB.
RCSB will bear its own expenses in connection with the solicitation of proxies
for the RCSB Special Meeting. See "THE MERGER--Expenses."

       HOLDERS OF RCSB COMMON STOCK ARE REQUESTED TO COMPLETE, DATE AND SIGN THE
ACCOMPANYING FORM OF PROXY AND TO RETURN IT PROMPTLY TO RCSB IN THE ENCLOSED
POSTAGE-PAID ENVELOPE.

NO APPRAISAL RIGHTS

       Under Section 262 of the DGCL, appraisal rights are available to
dissenting stockholders in connection with certain mergers or consolidations.
However, unless the certificate of incorporation otherwise provides and neither
the Charter One Certificate of Incorporation nor the RCSB certificate of
incorporation (the "RCSB Certificate of Incorporation") does, Section 262 does
not provide for appraisal rights (i) if the shares of the corporation are listed
on a national securities exchange or designated as a national market system
security on an inter-dealer quotations system by the National Association of
Securities Dealers, Inc. or held of record by more than 2,000 stockholders (as
long as the stockholders receive in the merger shares of the surviving
corporation or of any other corporation the shares of which are listed on a
national securities exchange or designated as a national market system security
on an inter-dealer quotations system by the National Association of Securities
Dealers, Inc. or held of record by more than 2,000 stockholders) or (ii) if the
corporation is the surviving corporation and no vote of its stockholders is
required on the merger. The DGCL does not provide appraisal rights to
stockholders who dissent from an amendment to the corporation's certificate of
incorporation, although a corporation's certificate of incorporation may so
provide. Neither the Charter One Certificate of Incorporation nor the RCSB
Certificate of Incorporation provide for appraisal rights beyond those
specifically provided under the DGCL.

                                       16


<PAGE>   29



           CHARTER ONE FINANCIAL, INC., CHARTER-MICHIGAN BANCORP, INC.
                          AND CHARTER ONE BANK, F.S.B.

GENERAL

       Charter One is a Delaware corporation organized in 1987 for the purpose
of becoming a holding company and owning all of the outstanding common stock of
Charter One Bank in connection with Charter One Bank's 1988 conversion from a
federally chartered mutual savings bank to a federally chartered stock savings
bank. In 1996, Charter One formed a new subsidiary, Charter Michigan,
headquartered in Michigan. Charter One's ownership of Charter One Bank was
transferred to Charter Michigan to facilitate the Company's multistate
operation. Charter One remains a unitary savings institution holding company
which, under existing laws, has very few restrictions on permissible types of
business activities. Charter One's business has consisted primarily of the
business of Charter One Bank and its subsidiaries. The executive offices of
Charter One are located at 1215 Superior Avenue, Cleveland, Ohio 44114, and the
telephone number is (216) 566-5300.

       Charter One Bank, chartered in 1934 as The First Federal Savings and Loan
Association of Cleveland, was the first federally chartered savings and loan
association in Ohio. In 1982, Charter One Bank converted to a federally
chartered savings bank, changing its name to The First Federal Savings Bank and,
in 1992, changed its name once again, to Charter One Bank, F.S.B.

       On October 31, 1995, Charter One completed the most significant merger in
its history when it combined with FirstFed Michigan Corporation ("FirstFed") in
a merger of equals. The FirstFed merger was accounted for as a pooling of
interests and, accordingly, the financial statements for Charter One for all
periods prior to the FirstFed merger have been restated to include the results
of FirstFed. FirstFed's principal subsidiary, First Federal of Michigan, a
savings and loan association, was merged with and into Charter One Bank. On
April 22, 1997 Charter One entered into an Agreement and Plan of Merger and
Reorganization with Haverfield pursuant to which a wholly owned subsidiary of
Charter One will merge with and into Haverfield to be followed immediately by
the merger of Haverfield with and into Charter Michigan. The Haverfield merger
is currently pending and is subject to, among other conditions, receipt of
requisite regulatory approvals and approval of the Haverfield stockholders.

       Headquartered in Cleveland, Ohio, Charter One Bank operates through 174
banking offices: 94 in Ohio and 80 in Michigan. Offices in Ohio serve the
Cleveland, Toledo, Youngstown, Portsmouth, Akron and Canton metropolitan areas.
The Michigan franchise continues to operate under the First Federal of Michigan
name and its markets include all of southeast Michigan, Lansing, Owosso and
Kalamazoo. In addition to the banking offices, Charter One has nine loan
production offices in Columbus, Dayton, Brimfield, Medina and Findlay, Ohio;
Grand Rapids and Clarkston, Michigan; Indianapolis, Indiana; and Ashland,
Kentucky.  

       The business of Charter One Bank consists primarily of attracting
deposits from the general public and using such deposits, together with
borrowings and other funds, to make residential mortgage, multifamily,
commercial real estate, consumer and business loans. Charter One Bank has
traditionally focused its lending activities on origination, for its portfolio,
of loans secured by conventional first mortgages on owner-occupied one-to-four
family residences located in its primary market areas. Residential mortgage
lending remains Charter One Bank's most significant lending activity. Charter
One Bank also originates first mortgage loans on multifamily and commercial real
estate located primarily in its local market areas, as well as construction,
consumer and business loans. Through subsidiaries, Charter One Bank engages in
real estate appraisal, sales of tax-deferred annuities, mutual funds, and
property and casualty and life insurance and the development, operation and sale
of real estate. Additionally, in 1995, the Bank acquired companies, now owned as
subsidiaries, which engage in leasing of capital equipment and providing data
processing services. None of the subsidiary activities is considered to
constitute a business segment. Charter One's earnings are affected by general
economic and competitive conditions, changes in market interest rates,
conditions in the real estate market, government policies and the actions of
federal and state regulatory authorities.

                                       17


<PAGE>   30



       Charter One Bank is a member of the Federal Home Loan Bank ("FHLB") of
Cincinnati which is a member of the FHLB System, and its deposits are insured up
to prescribed limits by the Federal Deposit Insurance Corporation ("FDIC").
Charter One Bank is subject to comprehensive examination, supervision and
regulation by its primary regulator, the OTS, and the FDIC.

       For additional information, see "SUMMARY -- Selected Consolidated
Financial and Other Data of Charter One Financial, Inc." and "UNAUDITED PRO
FORMA COMBINED FINANCIAL STATEMENTS." Additional information concerning Charter
One, Charter Michigan and Charter One Bank also is included in the Charter One
documents incorporated herein by reference. See "INCORPORATION OF CERTAIN
DOCUMENTS BY REFERENCE."

BENEFICIAL OWNERSHIP OF CERTAIN PERSONS

       Persons and groups owning in excess of 5% of Charter One Common Stock are
required to file certain reports regarding such ownership with Charter One and
the Commission. Charter One's directors and executive officers are also required
to file certain reports regarding their ownership of Charter One Common Stock
with the Commission and the National Association of Securities Dealers, Inc.
Copies of those reports must also be furnished to Charter One. A person is
considered the beneficial owner of Charter One Common Stock with respect to
which such person has or shares voting or investment power or has the right to
acquire ownership at any time within 60 days, including, without limitation,
through the exercise of a stock option, warrant or right, or the conversion of a
security. The following table sets forth, as of the Charter One Record Date, the
Charter One Common Stock beneficially owned by persons or groups owning in
excess of 5% of the Charter One Common Stock.
<TABLE>
<CAPTION>

                                                                      AMOUNT AND          PERCENT OF
                                                                      NATURE OF            SHARES OF
                NAME AND ADDRESS OF                                   BENEFICIAL         COMMON STOCK
                 BENEFICIAL OWNER                                     OWNERSHIP           OUTSTANDING
- ------------------------------------------------------------          ---------           -----------

<S>                                                                  <C>                     <C>  
FMR Corporation                                                      3,687,885(1)            7.97%
 82 Devonshire Street
 Boston, MA 02109

Martinique Hotel, Inc., Max M. Fisher, Jane F. Sherman               2,408,933(2)            5.21%
 Phillip Wm. Fisher, Mary D. Fisher, Julie Fisher Cummings
 and Marjorie Fisher Aronow
  2700 Fisher Building
  Detroit, MI 48202
<FN>

- -----------------------------


(1)     Included are 621,686 shares as to which the reporting party has sole
        power to vote and no shares as to which shared voting may be exercised.
        The reporting party has sole power to dispose of the entire 3,687,885
        shares.

(2)    Included are 537,352 shares owned by Martinique Hotel, inc.
       ("Martinique"), 1,228,023 shares owned by Max M. Fisher, 107,965 shares
       owned by Jane F. Sherman, 113,400 shares owned by Phillip Wm. Fisher,
       70,875 shares owned by Mary D. Fisher, 109,830 shares owned by Julie
       Fisher Cummings, and 113,400 shares owned by Marjorie Fisher Aronow, as
       to which shares the named company and individuals have sole voting and
       dispositive power. Also included are 126,088 shares held in various
       trusts for the benefit of certain grandchildren of Max M. Fisher with
       various dispositive power. Martinque is a personal holding company whose
       shares are owned by the individuals named in the above table other than
       Max M. Fisher, and all of such persons, including Max M. Fisher, are
       directors of Martinique. Additionally, Max M. Fisher's wife, Marjorie S.
       Fisher, is a director and serves as President of Martinique. As
       directors, such persons exercise shared voting and dispositive power over
       the shares held by Martinique.

</TABLE>

                                       18


<PAGE>   31



        The following table sets forth, as of the Charter One Record date,
certain information as to each director and certain executive officers of
Charter One as well as all executive officers and directors of Charter One as a
group.
<TABLE>
<CAPTION>

                                                                            AMOUNT AND                   PERCENT OF
                                                                             NATURE OF                   SHARES OF
                          NAME OF                                           BENEFICIAL                  COMMON STOCK
                     BENEFICIAL OWNER                                    OWNERSHIP (1)(2)(3)(4)         OUTSTANDING
                     ----------------                                   ----------------------          -----------

<S>                                                                           <C>                             
Charles John Koch, Director, Chairman of the Board,                           369,735(5)                     *
 President and Chief Executive Officer of Charter One
 and the Corporation's subsidiary, Charter One Bank

Mark D. Grossi, Director, Senior Vice President of the                        193,452(6)                     *
 Corporation and Executive Vice President of the Bank

John D. Koch, Director, Senior Vice President of Charter One                  218,162(7)                     *
and Executive Vice President of Charter One Bank

Richard W. Neu, Director, Treasurer of Charter One,                           251,721(8)                     *
 and Executive Vice President and Chief Financial
 Officer of Charter One Bank

Robert J. Vana, Chief Corporate Counsel and                                    92,264(9)                     *
 Secretary of Charter One and Charter One Bank

Eugene B. Carroll, Sr., Director                                               11,677                        *

Phillip W. Fisher, Director                                                   684,524(10)                  1.48%

Denise M. Fugo, Director                                                        6,450(11)                    *

Charles M. Heidel, Director                                                     4,358(12)                    *

Charles F. Ipavec, Director                                                   100,536                        *

Philip J. Meathe, Director                                                     15,435(13)                    *

Henry R. Nolte, Jr., Director                                                   6,825(14)                    *

Victor A. Ptak, Director                                                       13,647(15)                    *

Jerome L. Schostak, Director                                                1,642,388(16)                  3.55%

Mark Shaevsky, Director                                                        30,329(17)                    *

Eresteen R. Williams, Director                                                  1,938(18)                    *

All executive officers and directors as a group                             3,653,441(19)                  7.80%
(16 persons)
<FN>

____________________ 

*      Does not exceed 1%

(1)    Shares held under the Charter One Bank's employee savings plan are
       reported as of December 31, 1996. Shares held under the Charter One
       Employee Stock Ownership Plan (the "ESOP") are reported as of December
       31, 1996.

(2)    Assumes exercise of stock options held by beneficial owner exercisable
       within 60 days.

(3)    Included are shares owned directly or indirectly through a trust or
       corporation or by spouses and minor children, as to which the beneficial
       owner exercises sole voting and dispositive power, except as otherwise
       noted herein.
</TABLE>


                                       19


<PAGE>   32
(4)    For the executive officers, included are shares allocated to such
       executive officers under the ESOP, as well as a proportionate share of
       the unallocated shares, which are deemed to be beneficially owned by the
       executive officers as a result of the executive officers' ability to
       direct the trustee's voting of such shares through the vote of the
       executive officers' allocated shares.

(5)    Included are 122,350 shares Mr. Charles John Koch has the right to
       purchase pursuant to stock options exercisable within 60 days.

(6)    Included are 80,039 shares Mr. Grossi has the right to purchase pursuant
       to stock options exercisable within 60 days.

(7)    Included are 88,538 shares Mr. John D. Koch has the right to purchase
       pursuant to stock options exercisable within 60 days.

(8)    Included are 240,819 shares Mr. Neu has the right to purchase pursuant to
       stock options exercisable within 60 days.

(9)    Included are 37,800 shares Mr. Vana has the right to purchase pursuant to
       stock options exercisable within 60 days.

(10)   Includes 537,352 shares held by Martinque Hotels, Inc. of which Mr.
       Fisher is an approximately 15 percent owner and 33,772 shares held in
       various trusts of which Mr. Fisher serves as trustee. Mr. Fisher
       disclaims beneficial interest in the shares held by Martinque Hotels,
       Inc.

(11)   Included are 4,095 shares Ms. Fugo has the right to purchase pursuant to
       stock options exercisable within 60 days.

(12)   Included are 1,575 shares Mr. Heidel has the right to purchase pursuant
       to stock options exercisable within 60 days.

(13)   Included are 1,575 shares Mr. Meathe has the right to purchase pursuant
       to stock options exercisable within 60 days.

(14)   Included are 1,575 shares Mr. Nolte has the right to purchase pursuant to
       stock options exercisable within 60 days.

(15)   Included are 4,725 shares Mr. Ptak has the right to purchase pursuant to
       stock options exercisable within 60 days.

(16)   Included are 1,575 shares Mr. Schostak has the right to purchase pursuant
       to stock options exercisable within 60 days.

(17)   Included are 1,575 shares Mr. Shaevsky has the right to purchase pursuant
       to stock options exercisable within 60 days.

(18)   Included are 1,575 shares Ms. Williams has the right to purchase pursuant
       to stock options exercisable within 60 days.

(19)   Included are 587,816 shares the directors and executive officers as a
       group have the right to purchase pursuant to stock options exercisable
       within 60 days.


            RCSB FINANCIAL, INC. AND ROCHESTER COMMUNITY SAVINGS BANK

GENERAL

       RCSB is a Delaware corporation and is the holding company for Rochester
Bank, a New York State chartered savings bank and a wholly-owned subsidiary of
RCSB. RCSB and Rochester Bank are headquartered in Rochester, New York. RCSB's
business has consisted primarily of the business of Rochester Bank and its
subsidiaries. The executive offices of RCSB are located at 235 East Main Street,
Rochester, New York 14604 and the telephone number is (716) 423-7370.

       The business of Rochester Bank consists primarily of retail banking,
mortgage banking and automobile lending. Rochester Bank's retail banking
operation is conducted primarily through 38 full service banking offices in
western New York, while its mortgage origination activities encompass 42 offices
located mainly in the eastern third of the United States. Automobile loans are
originated through auto dealers located in most areas of New York and Florida
and in parts of Connecticut, Maryland, New Jersey, Pennsylvania and Virginia.

       Rochester Bank generates net interest income by accepting deposits from
the general public and investing those deposits, together with funds from
borrowings and ongoing operations, in a variety of residential mortgage,
automobile and other consumer loans and mortgage-backed securities. Net interest
income, representing the difference between interest earned on asset portfolios
and interest paid on liabilities, is the most significant component of Rochester
Bank's revenue. Rochester Bank also generates significant noninterest revenues
primarily by providing retail banking services to its customers and by
originating and servicing loans through Rochester Bank's mortgage banking
subsidiary. Rochester Bank's earnings are affected by general economic and
competitive conditions, changes in market interest rates, conditions in the real
estate market, government policies and the actions of federal and state
regulatory authorities.

       Rochester Bank is a member of the FHLB of New York, which is a member of
the FHLB system, and its deposits are insured up to prescribed limits by the
FDIC. Rochester Bank is subject to comprehensive examination, supervision and
regulation by its primary regulator, the New York Superintendent, and the FDIC.

                                       20
<PAGE>   33



       For additional information, see "SUMMARY --Selected Consolidated
Financial and Other Data of RCSB Financial, Inc." and "UNAUDITED PRO FORMA
COMBINED FINANCIAL STATEMENTS." Additional information concerning RCSB and
Rochester Bank also is included in the RCSB documents incorporated herein by
reference. See "INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE."

BENEFICIAL OWNERSHIP OF CERTAIN PERSONS

       Persons and groups owning in excess of 5% of RCSB Common Stock are
required to file certain reports regarding such ownership with RCSB and the
Commission. RCSB's directors and executive officers are also required to file
certain reports regarding their ownership of RCSB Common Stock with the
Commission and the National Association of Securities Dealers, Inc. Copies of
those reports must also be furnished to RCSB. A person is considered the
beneficial owner of RCSB Common Stock with respect to which such person has or
shares voting or investment power or has the right to acquire ownership at any
time within 60 days, including, without limitation, through the exercise of a
stock option, warrant or right, or the conversion of a security. The following
table sets forth, as of the RCSB Record Date, the RCSB Common Stock beneficially
owned by persons or groups owning in excess of 5% of the RCSB Common Stock.
<TABLE>
<CAPTION>

                                                                                     PERCENT OF
                                                        AMOUNT AND                   SHARES OF
        NAME AND ADDRESS OF                        NATURE OF BENEFICIAL            COMMON STOCK
         BENEFICIAL OWNER                               OWNERSHIP                   OUTSTANDING
- --------------------------------------             --------------------             -----------

<S>                                                     <C>                             <C>  
The Rochester Community Savings Bank                    1,121,978(1)                    7.57%
 Employee Investment and Stock
 Ownership Plan ("EISOP")
<FN>
- ---------------------------
(1)     Ownership is as of August 18, 1997. Key Trust Company of Ohio, N.A.
        ("Key"), a subsidiary of KeyCorp, acts as trustee for the EISOP. The
        participants in the EISOP have voting and dispositive power for 903,053
        shares, reflecting those shares which have been allocated to participant
        accounts. The Employee Benefits Committee of RCSB, comprised of four
        officers of RCSB, serves as the plan administrator and has dispositive
        power for the 218,925 shares not allocated to participant accounts. Key
        disclaims beneficial ownership of the EISOP shares.
</TABLE>

                                       21


<PAGE>   34



       The following table sets forth as of the RCSB Record Date certain
information as to each director and certain executive officers of RCSB, as well
as all directors and executive officers of RCSB as a group.
<TABLE>
<CAPTION>

                                                                                                     PERCENT OF
                                                                           AMOUNT AND                 SHARES OF
                           NAME OF                                   NATURE OF BENEFICIAL           COMMON STOCK
                        BENEFICIAL OWNER                                   OWNERSHIP(1)              OUTSTANDING
                        ----------------                                   ------------              -----------

<S>                                                                         <C>                             
Matthew Augustine, Director                                                 4,000(2)                       *

Bruce B. Bates, Director                                                   15,000(3)(4)                    *

Karen Noble Hanson, Director                                                5,448(3)(5)                    *

George G. Kaufman, Director                                                16,926(3)(6)                    *

Salvatore R. Martoche, Director                                             5,200(3)(7)                    *

Michael P. Morley, Director                                                 3,223(8)                       *

Karen D. Petrou, Director                                                   3,238(8)                       *

Ronald F. Poe, Vice Chairman, Director                                      7,796(3)(9)                    *

Leonard Schutzman, Director                                                 3,406(10)                      *

Leonard S. Simon, Chairman, President and Chief Executive                 278,684(11)                     1.83%
  Officer, Director

John P. Tierney, Director                                                   3,119(12)                      *

J. Michael Holloway, President and Chief Executive Officer,                34,865(13)                      *
 American Credit Services, Inc.

Edward J. Pettinella, Executive Vice President                            126,887(14)                      *

Michael S. Pope, Senior Vice President, Retail Banking                     13,915(15)                      *

Paul S. Reid, President and Chief Executive Officer,                       33,787(16)                      *
  American Home Funding, Inc.

All directors and executive officers as a group (19 persons)              695,961                         4.56%

<FN>

_________________

*      Does not exceed 1%.

(1)    Based upon information provided by the respective directors and executive
       officers. Assumes exercise of stock options held by beneficial owner.

(2)    Includes 1,000 shares held in a pension account and exercisable options
       to purchase 2,500 shares under the 1992 Stock-Based Compensation Plan.
       Excludes 384 share equivalents held in the 1996 Non-Employee Director
       Deferred Compensation Plan which are issuable to the participant on the
       deferral payment date selected by the participant in the plan.

(3)    Includes exercisable options to purchase 4,000 shares under the 1992
       Stock-Based Compensation Plan.

(4)    Excludes 1,167 share equivalents held in the 1996 Non-Employee Director
       Deferred Compensation Plan which are issuable to the participant on the
       deferral payment date selected by the participant in the plan.

(5)    Excludes 707 share equivalents held in the 1996 Non-Employee Director
       Deferred Compensation Plan which are issuable to the participant on the
       deferral payment date selected by the participant in the plan.

(6)    Excludes 812 share equivalents held in the 1996 Non-Employee Director
       Deferred Compensation Plan which are issuable to the participant on the
       deferral payment date selected by the participant in the plan.

</TABLE>
                                       22


<PAGE>   35




(7)    Includes 100 shares held in a pension account and 100 shares held in
       spouse's name as to which he disclaims beneficial ownership. Excludes 766
       share equivalents held in the 1996 Non-Employee Director Deferred
       Compensation Plan which are issuable to the participant on the deferral
       payment date selected by the participant in the plan.

(8)    Includes exercisable options to purchase 2,000 shares under the 1992
       Stock-Based Compensation Plan.

(9)    Includes 2,000 shares held in spouse's name as to which he disclaims
       beneficial ownership.

(10)   Excludes 78 share equivalents held in the 1996 Non-Employee Director
       Compensation Plan which are issuable to the participant on the deferral
       payment date selected by the participant in the plan.

(11)   Includes 15,562 shares held in spouse's name as to which he disclaims
       beneficial ownership and one share held jointly with spouse. Also
       includes options to purchase 77,925 shares under the 1986 Stock Option
       Plan and the 1992 Stock-Based Compensation Plan. In addition,
       performance-based options for 80,000 shares were granted under the 1992
       Stock-Based Compensation Plan. Also includes 26,321 shares held as of
       August 18, 1997 in the EISOP.

(12)   Includes exercisable options to purchase 1,000 shares under the 1992
       Stock-Based Compensation Plan. Excludes 423 share equivalents held in the
       1996 Non-Employee Director Deferred Compensation Plan which are issuable
       to the participant on the deferral payment date selected by the
       participant in the plan.

(13)   Includes 2,000 shares held in a pension account. Also includes options to
       purchase 15,900 shares under the 1986 Stock Option Plan and the 1992
       Stock-Based Compensation Plan. In addition, performance-based options
       for 5,509 shares are held under the 1992 Stock-Based Compensation Plan.
       Also includes 11,456 shares held as of August 18, 1997 in the EISOP.

(14)   Includes options to purchase 52,400 shares under the 1986 Stock-Based
       Compensation Plan. In addition, performance-based options for 60,000
       shares are held under the 1992 Stock-Based Compensation Plan. Also
       includes 14,487 shares held as of August 18, 1997 in the EISOP.

(15)   Includes 100 shares held as custodian for his son. Also includes 2,515
       shares held as of August 18, 1997 in the EISOP.

(16)   Includes 500 shares held jointly with his wife. Also includes options to
       purchase 12,000 shares under the 1986 Stock Option Plan. In addition,
       performance-based options for 13,222 shares are held under the 1992 Stock
       Based Compensation Plan. Also includes 8,065 shares held as of August 18,
       1997 in the EISOP.

                               RECENT DEVELOPMENTS

       On April 22, 1997, Charter One, Charter Michigan and Charter One Bank
entered into a definitive agreement with Haverfield and Home Bank (the
"Haverfield Merger Agreement") which provides for, among other things, a newly
formed Ohio corporation and wholly-owned subsidiary of Charter One to be merged
with and into Haverfield (the "Haverfield Merger"); Haverfield to be merged with
and into Charter Michigan; and Home Bank to be merged with and into Charter One
Bank.

       Consummation of the Haverfield Merger is subject to customary conditions,
including, among other things, (i) the approval of the Haverfield Merger
Agreement by two-thirds vote of the stockholders of Haverfield and (ii) receipt
of regulatory approvals.

       Upon consummation of the Haverfield Merger, all of the issued and
outstanding shares of Haverfield common stock (other than shares held by Charter
One, Haverfield, or any of their subsidiaries, and other than shares held by
stockholders who have exercised dissenters' rights under Ohio law) will be
canceled and converted into the number of shares of Charter One Common Stock
equal to the number of shares of Haverfield common stock multiplied by the
"Haverfield Exchange Ratio." The Haverfield Exchange Ratio is (i) equal to
$27.00 divided by the average closing sales price of Charter One Common Stock
over the 20 consecutive full trading-day period ending five business days before
the closing of the Haverfield Merger (the "Charter One Closing Price") if the
Charter One Closing Price is equal to or greater than $41.09 and less than or
equal to $55.60; (ii) .4856 if the Charter One Closing Price is greater than
$55.60; (iii) .6571 if the Charter One closing Price is less than $41.09 but
equal to or greater than $38.05; (iv) equal to $25.00 divided by the Charter One
Closing Price if the Charter One Closing Price is less than $38.05 but equal to
or greater than $36.55; and (v) .6840 if the Charter One Closing Price is less
than $36.55, subject to Haverfield's right to terminate the Haverfield Merger
Agreement. If Haverfield elects to terminate the Haverfield Merger Agreement as
a result of a Charter One Closing Price below $36.55, such termination shall
only occur if Haverfield gives Charter One timely written notice of its election
to terminate and Charter One fails to agree to a Haverfield Exchange Ratio of
$25.00 divided by the Charter One Closing Price.

                                       23


<PAGE>   36



       Haverfield is headquartered in Cleveland, Ohio and through Home Bank,
operates a banking business in Ohio. At March 31, 1997, Haverfield had total
consolidated assets of $341.7 million, deposits of $273.2 million and
stockholders' equity of $28.7 million. Haverfield's principal executive offices
are located in the Terminal Tower, 50 Public Square, Suite 444, Cleveland, Ohio
44113-2204. Haverfield's telephone number is (216) 348-2800 and its facsimile
transmission number is (216) 348-8840. See "UNAUDITED PRO FORMA COMBINED
FINANCIAL STATEMENTS, and UNAUDITED PRO FORMA PER SHARE DATA."

                                   THE MERGER

       The information in this Joint Proxy Statement/Prospectus concerning the
terms of the Merger is qualified in its entirety by reference to the full text
of the Merger Agreement, which is attached hereto at Annex A and incorporated by
reference herein. All stockholders are urged to read the Merger Agreement in its
entirety.

GENERAL

       To implement the Merger, RCSB will be merged with and into Charter
Michigan in a "stock-for-stock exchange" transaction. If the Merger is
consummated, each share of RCSB Common Stock issued and outstanding prior to the
Effective Time (other than Excluded Shares), will be converted into the right to
receive .91 shares of Charter One Common Stock, including the right to receive a
corresponding number of rights associated with the Charter One Common Stock
pursuant to the Rights Agreement. See "-- Merger Consideration," and "COMPARISON
OF RIGHTS OF STOCKHOLDERS OF CHARTER ONE FINANCIAL, INC. AND RCSB FINANCIAL,
INC. -- Rights Agreements."

BACKGROUND OF AND REASONS FOR THE MERGER

       Background of the Merger. From time to time, Charter One has reviewed its
strategic alternatives for enhancing profitability and maximizing stockholder
value, particularly in light of the changes in the thrift industry in recent
years. During the late 1980s and early 1990s, many thrift institutions were
adversely affected by weak economic conditions and deteriorated real estate
markets. The thrift industry has also been subject to intensified competition
from commercial banks, as well as from non-bank financial services providers.
Despite the competitive and economic pressures on Charter One, it has performed
well during recent periods and established a strategic plan to benefit from its
relative financial strength.

       Since the late 1980s, Charter One has pursued a strategic plan that
includes the expansion of its existing and related businesses and the
acquisition of smaller financial institutions or branch offices in, or
contiguous to, its market area. In furtherance of this plan, between 1989 and
1993 Charter One acquired (i) Western Reserve Savings Bank of Cleveland, Ohio,
(ii) First Federal Savings and Loan Association of Akron (Ohio), (iii) First
American BanCorp (Canton, Ohio), (iv) Women's Federal Savings Bank (Cleveland,
Ohio) and (v) $1.8 billion of assets from the Resolution Trust Corporation (the
"RTC").

       Consistent with Charter One's strategic objectives of growing its
franchise within its market area and in areas contiguous thereto, in October
1995 Charter One completed the most significant merger in its history when it
combined with FirstFed in a merger of equals. Furthermore, in December 1995
Charter One acquired 21 branches from First Nationwide Bank, which included
approximately $765 million in deposits.

       On April 22, 1997, Charter One entered into the Haverfield Merger
Agreement pursuant to which Charter One will acquire Haverfield. The Haverfield
Merger is currently pending and is subject to, among other conditions, receipt
of requisite regulatory approvals and approval of the Haverfield stockholders.
See "RECENT DEVELOPMENTS" and "UNAUDITED PRO FORMA COMBINED FINANCIAL
STATEMENTS."

       The RCSB Board has from time to time reviewed its strategic alternatives
for enhancing shareholder value. At such times, the RCSB Board has expressed to
management that it had great confidence in the future of RCSB as an independent
institution, but that management should be cognizant of the RCSB Board's
fiduciary obligation to consider bona fide offers that might enhance stockholder
value.

                                       24


<PAGE>   37



       Charles J. Koch, the chief executive officer of Charter One, and Leonard
S. Simon, the chief executive officer of RCSB, have been acquainted for ten or
more years, primarily through their trade association activities. Several
investment banking firms, on a number of occasions, commented generally to
Messrs. Koch and Simon on the potential benefits of a strategic alliance of
Charter One and RCSB. In January 1997, Mr. Koch called Mr. Simon to suggest a
meeting at which they could explore the benefits of such an alliance in some
detail. Such a meeting was held in February 1997 and was followed by a longer,
more detailed meeting in March 1997. The full RCSB Board was briefed on the
discussions and directed management to continue to pursue a strategic alliance.
RCSB and Charter One, having executed a confidentiality agreement, exchanged
regulatory and internal reports and business plans. A two-day meeting of the
members of the two senior management teams was held in mid-April 1997. The
meeting covered a wide range of areas, but primarily focused on RCSB's mortgage
banking and automobile lending subsidiaries. The parties also discussed the
general parameters of a merger transaction and agreed to continue discussions.
Charter One's counsel prepared a draft merger agreement and provided it to RCSB.
The Executive Committee of the RCSB Board met on April 30, 1997. Lehman Brothers
briefed the committee with respect to factors affecting the RCSB Board's
decision on the proposed merger, including valuations of Charter One and RCSB,
the pro forma contribution of RCSB to Charter One, RCSB's strategic
alternatives, and merger structuring issues. The committee gave RCSB management
guidance regarding terms of the merger it would consider acceptable.

       Charter One and RCSB agreed on the scope and schedule of the due
diligence investigation to be performed by each party. Mr. Koch and Mr. Simon
met in Cleveland on May 3, 1997, and reached tentative agreement that the merger
would involve a fixed exchange ratio, without any collar or walkaway provision
based on the price of Charter One Common Stock. A preliminary agreement on the
exchange ratio was also reached, subject to the results of due diligence.
Extensive due diligence was performed during the week of May 5, 1997, primarily
at off-site locations in Rochester, New York, and Richmond, Virginia, and at
Charter One's executive offices in Cleveland, Ohio, with telephone calls and
documents continuing to be exchanged thereafter. The full RCSB Board met on May
10, 1997 for a briefing from Lehman Brothers and to review the results of due
diligence and the parameters of the merger agreement and related agreements
proposed by Charter One.

       Negotiations with respect to the definitive merger agreement and related
agreements continued during the week of May 12, 1997 and through the eventual
signing of the Merger Agreement. Those discussions, which involved the senior
management teams and financial advisors of Charter One and RCSB, culminated on
May 18, 1997 in a final agreement on a fixed exchange ratio, subject to
negotiation of the definitive merger agreement and approval by both boards of
directors.

       The definitive merger agreement and related agreements were finalized on
May 19 and 20, 1997, with participation by top management officials of both
Charter One and RCSB, outside counsel, and financial advisors. The Charter One
Board met on Wednesday, May 21, 1997, in Detroit, Michigan, and the RCSB Board
met at 2:00 p.m. on the same date in Rochester, New York. Following receipt of
fairness opinions from their respective financial advisors, both boards
unanimously approved and adopted the Merger Agreement and the transactions
contemplated thereby.

       Charter One's Reasons for the Merger. The Charter One Board has
determined that the terms of the Merger and the Merger Agreement are advisable
and fair to, and in the best interests of, Charter One and its stockholders. In
reaching its determination, the Charter One Board consulted with its financial
advisor with respect to the financial aspects and fairness of the transaction.
In arriving at its determination, the Charter One Board also considered a number
of factors which indicated that the Merger should produce an institution that is
well capitalized, and one which will enjoy an enhanced retail lending franchise
as well as a number of balance sheet and financial benefits that should foster
the potential for earnings growth. The Charter One Board did not assign any
specific or relative weights to the factors considered, and individual directors
may have given different weights to different factors. The material factors
considered were:

       (i) Information concerning the businesses, earnings, operations,
financial condition, prospects, capital levels and asset quality of RCSB,
individually and as combined with Charter One. An integral component of this
consideration was the determination that it was a natural eastward market
extension for Charter One, providing for a market area spanning from Detroit,
Michigan to Cleveland, Ohio to Buffalo and Rochester, New York. Additionally,
Charter One viewed the acquisition of RCSB's automobile portfolio as a
continuation of its business plan to generate higher yielding and shorter
duration assets.

                                       25


<PAGE>   38




       (ii) The financial advice rendered by Charter One's financial advisor
that the consideration to be paid by Charter One in the Merger is fair, from a
financial point of view, to Charter One and its stockholders. See "--Opinion of
Charter One's Financial Advisor."

       (iii) The terms of the Merger Agreement, the Stock Option Agreement and
the other documents executed in connection with the Merger.

       (iv) The anticipated cost savings and efficiencies available to the
combined company as a result of the Merger.

       (v) The current and prospective economic, competitive and regulatory
environment facing each institution and other financial institutions.

       (vi) The results of the due diligence investigation conducted by the
management of Charter One, including assessment of credit policies, asset
quality, interest rate risk, litigation and adequacy of loan loss reserves.

       (vii) The expectation that the Merger would be tax free to Charter One
for federal income tax purposes and accounted for under the pooling of interests
method of accounting. See "--Certain Federal Income Tax Consequences of the
Merger" and "--Accounting Treatment."

       (viii) The prospects for growth and expanded products and services, and
other anticipated impacts on depositors, employees, customers and communities
served by Charter One and RCSB, respectively.

       In addition, the Charter One Board considered RCSB's extensive retail
network in western New York, its extensive mortgage origination activities
located mainly in the eastern third of the United States and its automobile loan
origination activities throughout most areas of New York and Florida and in
parts of Connecticut, Maryland, New Jersey, Pennsylvania and Virginia.

       THE CHARTER ONE BOARD UNANIMOUSLY RECOMMENDS THAT CHARTER ONE
STOCKHOLDERS VOTE FOR ADOPTION OF THE MERGER AGREEMENT.

       RCSB's Reasons for the Merger. The RCSB Board has determined that the
terms of the Merger and the Merger Agreement are advisable and are fair to, and
in the best interests of, RCSB and its stockholders. In reaching its
determination, the RCSB Board consulted with its financial advisor with respect
to fairness from a financial point of view of the consideration to be received
by RCSB Stockholders in the Merger. In arriving at its determination, the RCSB
Board also considered a number of other factors. The RCSB Board did not assign
any specific or relative weights to the factors considered, and individual
directors may have given different weights to different factors. The material
factors considered were:

       (i) The RCSB Board was of the view that, based on historical and
anticipated trading ranges for Charter One Common Stock, the value of the
consideration to be received by RCSB stockholders resulting from the Exchange
Ratio represented a fair multiple of RCSB's per share book value and earnings.
The RCSB Board also considered that the Merger would qualify as a tax-free
reorganization under the Code. (See "-- Certain Federal Income Tax Consequences
of the Merger") and be unlikely to trigger antitrust concerns.

       (ii) The RCSB Board considered the prospects for growth and expanded
products and services, including business loans and other expansion
opportunities, and other anticipated impacts on depositors, employees, customers
and communities served by RCSB.

       (iii) The RCSB Board considered the business and financial condition of
Charter One and its favorable position among its peer group of regional thrift
institutions in terms of efficiency, profitability and asset quality. The RCSB
Board further considered the reputation and business practices of Charter One
and its management as they would affect the employees of RCSB.

       (iv) The RCSB Board considered the prospect that combining with Charter
One would enable RCSB's business lines to make a great contribution to the
combined entity. The RCSB Board anticipates that the combination will allow
RCSB's automobile lending business to expand more rapidly, and that affiliation
with a portfolio lender such as Charter One will enhance RCSB's mortgage banking
business. The RCSB Board perceives a similarity of marketing approaches

                                       26


<PAGE>   39



and target groups between the retail banking businesses of RCSB and Charter One
that will enhance Charter One's ability to take advantage of RCSB's franchise.

       (v) The RCSB Board considered the results of the due diligence
investigations conducted by RCSB's management and Lehman Brothers, including
assessment of credit policies, asset quality, interest rate risk, and adequacy
of loan loss reserves.

       (vi) The RCSB Board consulted with Lehman Brothers regarding the
possibility of remaining an independent institution as a possible alternative to
the transaction with Charter One.

       (vii) The RCSB Board considered the opinion of Lehman Brothers as to the
fairness of the consideration to be received in the Merger to RCSB stockholders
from a financial point of v-- Opinion of RCSB's Financial Advisor."

       THE RCSB BOARD UNANIMOUSLY RECOMMENDS THAT RCSB STOCKHOLDERS VOTE FOR
ADOPTION OF THE MERGER AGREEMENT.

RECOMMENDATION OF THE CHARTER ONE BOARD

       The Charter One Board has unanimously adopted the Merger Agreement and
approved the transactions contemplated thereby and has determined that the
Merger and the issuance of shares of Charter One Common Stock pursuant thereto
are fair to and in the best interests of Charter One and its stockholders. THE
CHARTER ONE BOARD THEREFORE UNANIMOUSLY RECOMMENDS THAT STOCKHOLDERS VOTE FOR
ADOPTION OF THE MERGER AGREEMENT AT THE CHARTER ONE SPECIAL MEETING.

RECOMMENDATION OF THE RCSB BOARD

       The RCSB Board has unanimously adopted the Merger Agreement and approved
the transactions contemplated thereby and has determined that the Merger is in
the best interests of RCSB and its stockholders. THE RCSB BOARD THEREFORE
UNANIMOUSLY RECOMMENDS THAT STOCKHOLDERS VOTE FOR ADOPTION OF THE MERGER
AGREEMENT AT THE RCSB SPECIAL MEETING.

OPINION OF CHARTER ONE'S FINANCIAL ADVISOR

       Pursuant to an engagement letter dated May 12, 1997 (the "Engagement
Letter"), Charter One engaged Montgomery to act as Charter One's financial
advisor concerning Charter One's acquisition of RCSB and to render an opinion as
to the fairness, from a financial point of view, of the Merger Consideration to
be paid by Charter One pursuant to the Merger. As part of its opinion,
Montgomery reviewed certain publicly available financial and other data with
respect to RCSB and Charter One. Montgomery is a nationally recognized
investment banking firm and, as part of its investment banking activities, is
regularly engaged in the valuation of businesses and their securities in
connection with merger transactions and other types of acquisitions, negotiated
underwritings, private placements and valuations for corporate and other
purposes. Charter One selected Montgomery to render the opinion on the basis of
its experience and expertise in thrift mergers and its reputation in the banking
and investment communities.

       At a meeting of the Charter One Board on May 21, 1997, Montgomery
delivered its oral opinion that the consideration to be paid by Charter One
pursuant to the Merger is fair to Charter One and its stockholders, from a
financial point of view, as of the date of such opinion. Montgomery's oral
opinion was subsequently confirmed in writing as of such date.

       THE FULL TEXT OF MONTGOMERY'S WRITTEN OPINION TO THE CHARTER ONE BOARD,
DATED MAY 21, 1997, WHICH SETS FORTH THE ASSUMPTIONS MADE, MATTERS CONSIDERED,
AND LIMITATIONS OF THE REVIEW BY MONTGOMERY, IS ATTACHED HERETO AS ANNEX B AND
IS INCORPORATED HEREIN BY REFERENCE. THE FOLLOWING SUMMARY OF MONTGOMERY'S
OPINION IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO THE FULL TEXT OF THE
OPINION ATTACHED HERETO, WHICH SHOULD BE READ CAREFULLY AND IN ITS ENTIRETY. In
furnishing such opinion, Montgomery does not admit that it is an expert with
respect to the Registration Statement of which this Joint Proxy
Statement/Prospectus is a part within the meaning of the term experts" as used
in the Securities Act and the rules and regulations promulgated thereunder nor
does it admit that its opinion constitutes a report or valuation within the
meaning of Section 11 of the Securities Act. Montgomery's opinion

                                       27


<PAGE>   40



is directed to the Charter One Board, covers only the fairness of the
consideration to be paid by Charter One pursuant to the Merger, from a financial
point of view, as of the date of the opinion and does not constitute a
recommendation to any holder of Charter One Common Stock as to how such
stockholder should vote at the Charter One Special Meeting.

       In connection with its May 21, 1997 opinion, Montgomery, among other
things: (i) reviewed certain publicly available financial and other data with
respect to Charter One and RCSB, including the audited, consolidated financial
statements of Charter One for the fiscal years ended December 31, 1995 and 1996
and unaudited consolidated financial statements of Charter One for the three
months ended March 31, 1997, the audited consolidated financial statements of
RCSB for the fiscal years ended November 30, 1995 and 1996 and the unaudited
consolidated financial statements of RCSB for the three months ended February
28, 1997 and certain other relevant financial and operating data relating to
Charter One and RCSB made available to Montgomery from published sources and, in
the case of Charter One, from the internal records of Charter One; (ii) reviewed
a draft of the Merger Agreement; (iii) reviewed certain publicly available
information concerning the trading of, and the trading market for, Charter One
Common Stock and RCSB Common Stock; (iv) compared both Charter One and RCSB from
a financial point of view with certain other companies in the thrift industry
which Montgomery deemed to be relevant; (v) considered the financial terms, to
the extent publicly available, of selected recent business combinations of
companies in the thrift industry which Montgomery deemed to be comparable, in
whole or in part, to the Merger; (vi) reviewed and discussed with
representatives of the management of Charter One certain information of a
business and financial nature regarding Charter One and RCSB furnished to       
Montgomery by Charter One and RCSB, including financial projections and related
assumptions of Charter One and RCSB; (vii) reviewed certain third party
analysts estimates regarding RCSB; (viii) made inquiries regarding and
discussed the Merger and the Merger Agreement and other matters related thereto
with Charter One counsel; and (ix) performed such other analyses and
examinations as Montgomery deemed appropriate.

        In connection with Montgomery's review, Montgomery did not assume any
obligation independently to verify the foregoing information and relied on all
such information being accurate and complete in all material respects. With
respect to the financial projections for Charter One and RCSB provided to
Montgomery by Charter One's management and RCSB's management, upon managements'
advice and with Charter One's and RCSB's consent, Montgomery assumed for
purposes of its opinion that the projections were reasonably prepared on bases
reflecting the best available estimates and judgment of Charter One's and
RCSB's management at the time of preparation as to the future financial
performance of Charter One and RCSB, and that they provided a reasonable basis
upon which Montgomery could form its opinion. Montgomery assumed that there
were no material changes in Charter One's or RCSB's assets, financial
condition, results of operations, business or prospects since the respective
dates of their last financial statements made available to Montgomery.
Montgomery relied on advice of counsel and independent accountants to Charter
One as to all legal and financial matters with respect to Charter One, the
Merger and the Merger Agreement. Montgomery assumed that the Merger will be
consummated in a manner that complies in all respects with the applicable
provisions of the Securities Act, the Exchange Act and all other applicable
federal and state statutes, rules and regulations. Montgomery is not an expert
in the evaluation of loan portfolios for purposes of assessing the adequacy
of the allowances for losses with respect thereto and assumed, with Charter
One's consent, that such allowances for each of Charter One and RCSB were in
the aggregate adequate to cover such losses. In addition, Montgomery did not
assume responsibility for reviewing any individual credit files, or making an
independent evaluation, appraisal or physical inspection of any of the assets
or liabilities (contingent or otherwise) of Charter One or RCSB nor was
Montgomery furnished with any such appraisals. Charter One informed Montgomery,
and Montgomery assumed, that the Merger will be recorded as a pooling of
interests under generally accepted accounting principles. Finally, Montgomery's
opinion was based on economic, monetary and market and other conditions as in
effect on, and the information made available to Montgomery as of, the date of
the opinion. Accordingly, although subsequent developments may affect the
opinion, Montgomery has not assumed any obligation to update, revise, or
reaffirm its opinion.

       Set forth below is a brief summary of the report presented by Montgomery
to the Charter One Board on May 21, 1997 in connection with its opinion.

       Analysis of Selected Merger Transactions. Montgomery reviewed the
consideration paid in selected categories of thrift transactions. Specifically,
Montgomery reviewed thrift transactions from January 1, 1996 to May 21, 1997
involving (i) national mergers ("National Mergers") with announced transaction
value greater than $500 million and (ii) select mergers in the Midwestern and
Eastern United States ("Midwest and East Mergers") with announced

                                       28


<PAGE>   41



transaction value greater than $500 million. For each transaction, Montgomery
analyzed data illustrating, among other things, purchase price to book value,
purchase price to tangible book value, purcremium (i.e., purchase price in
excess of tangible book value) to core deposits, and purchase price to last
twelve-months ("LTM") earnings. A summary of the median multiples in the
analysis is as follows:
<TABLE>
<CAPTION>

                                                     Price to      Price to                    Premium      Price to       No. of
                                                       Book         Tan.Bk.     Price to       to Core        LTM          Trans.
Transaction Categories                                Value         Value       Deposits       Deposits     Earnings      Examined
- -----------------------                              -------       -------      ---------      ---------   ----------    ---------
<C>                                                  <C>            <C>           <C>           <C>       <C>              <C>
National Mergers with announced
transaction value of greater than
$500 million ....................................     1.93x         1.93x         21.18%         14.13%      21.80x         9

Selected Midwest and East Mergers
with announced transaction value
of greater than $500 million ....................     2.02x         2.31x         19.37x         13.46%      22.65x         4
</TABLE>


       A summary of the results of Montgomery's analysis concerning the Merger
is as follows:
<TABLE>
<CAPTION>

                                                   Price to       Price to                     Premium      Price to
                                                    Book          Tan. Bk.     Price to        to Core        LTM
                                                    Value          Value       Deposits       Deposits      Earnings
                                                    -----          -----       --------       --------      -------

<S>                                                 <C>             <C>         <C>             <C>          <C>   
The Merger ............................             1.99x           2.04x       26.82%          14.54%       17.11x
</TABLE>


       Montgomery also used a group of 24 national thrift acquisitions announced
since January 1, 1996 with announced transaction value of greater than $100
million where pricing information was available to analyze premiums paid
compared to the seller stock price at various times prior to the announcement of
the acquisition. These figures produced: (i) a median premium to the seller's
stock price one month prior to announcement of 23.2%; (ii) a median premium to
the seller's stock price six days prior to announcement of 21.1%; and (iii) a
median premium to the seller's stock price the day prior to announcement of
12.0%. In comparison, Charter One's offer of $42.43 based on an exchange ratio
of 0.91x and a stock price of $46.63 per share exceeded the price of RCSB Common
Stock one month prior to the announcement by 40.3%, the price of RCSB Common
Stock six days prior to the announcement by 36.3% and the price of RCSB Common
Stock one day prior to the announcement by 27.6%.

       Present Value Analysis. In performing the present value analysis,
Montgomery estimated the future earnings per share and dividend payments of RCSB
over a five year period. The estimated earnings per share in the year 2001 was
multiplied by an estimated price to earnings multiple ranging from 16.0x to
20.0x. This product was then added to the cumulative estimated dividends
assuming estimated cost savings and maintaining a 6.5% equity-to-assets ratio.
The sum of these two numbers was then discounted to the present using a discount
rate ranging from 15.0% to 17.0%. This analysis indicated that the present value
of RCSB's future stock price plus dividends ranged from $40.71 to $50.64 per
share, as compared to Charter One's offer of $42.43 per share.

       Contribution Analysis. Montgomery analyzed the contribution of each of
Charter One and RCSB to, among other things, total equity, assets, deposits and
core deposits of the pro forma combined companies for the period ending March
31, 1997997 for RCSB and projected net income for the calendar year ending
December 31, 1997. This analysis showed, among other things, that based on pro
forma combined balance sheets for Charter One and RCSB at March 31, 1997 and
February 28, 1997, respectively, RCSB would have contributed 25.0% of the total
equity, 22.3% of the total assets and 23.2% of the total deposits. The pro forma
projected income statement for the period ending December 31, 1997 showed that
RCSB would contribute 16.7% of the net income. Based on an exchange ratio of
0.91x of Charter One Common Stock for each share of RCSB Common Stock, holders
of Charter One Common Stock would own approximately 77.8% of the combined
companies based on common shares outstanding of Charter One at March 31, 1997.

       Dilution Analysis. Using earnings estimates provided by Charter One's
management, Montgomery compared estimated reported EPS ("Reported EPS") of
Charter One Common Stock on a stand-alone basis to the Reported EPS

                                       29


<PAGE>   42



of the common stock for the pro forma combined company for the calendar year
1997. Montgomery noted that, based upon the estimates after giving effect to
management's pretax cost savings estimates and certain assumptions as to, among
other things, the Merger Consideration, the Merger would be accretive to Charter
One's Reported EPS for the year ending December 31, 1997. These estimates were
used for purposes of this analysis only and are not necessarily indicative of
expected results or plans of Charter One, RCSB or the combined institution.

       Comparable Company Analysis. Using public and other available
information, Montgomery compared certain financial ratios and public market data
of RCSB versus financial ratios and public financial data of a group of publicly
traded Northeast thrifts with asset sizes between $2.0 billion and $6.0 billion.
Such financial ratios included the ratio of net income to average total assets
("return on average assets"), the ratio of net income to average total equity
("return on average equity"), the ratio of equity to assets, the ratio of
noninterest expense to revenue ("efficiency"), and numerous other credit ratios
for the quarter ended March 31, 1997 for the Comparable Companies and for the
quarter ended February 28, 1997 for RCSB. The analysis necessarily involved
complex considerations and judgments concerning differences in financial and
operating characteristics of the companies.

       The summary set forth above does not purport to be a complete description
of the presentation by Montgomery to the Charter One Board or of the analyses
performed by Montgomery. The preparation of a fairness opinion is not
necessarily susceptible to partial analysis or summary description. Montgomery
believes that its analyses and the summary set forth above must be considered as
a whole and that selecting a portion of its analyses and factors, without
considering all analyses and factors, would create an incomplete view of the
process underlying the analyses set forth in its presentation to the Charter One
Board. In addition, Montgomery may have given various analyses more or less
weight than other analyses, and may have deemed various assumptions more or less
probable than other assumptions, so that the ranges of valuations resulting from
any particular analysis described above should not be taken to be Montgomery's
view of the actual value of Charter One or the combined companies. The fact that
any specific analysis has been referred to in the summary above is not meant to
indicate that such analysis was given greater weight than any other analysis.

       In performing its analyses, Montgomery made numerous assumptions with
respect to industry performance, general business and economic conditions and
other matters, many of which are beyond the control of Charter One or RCSB. The
analyses performed by Montgomery are not necessarily indicative of actual values
or actual future results, which may be significantly more or less favorable than
suggested by such analyses. Such analyses were prepare analysis of the fairness
of the Merger Consideration to be paid by Charter One in the Merger and were
provided to the Charter One Board in connection with the delivery of
Montgomery's opinion. The analyses do not purport to be appraisals or to reflect
the prices at which a company might actually be sold or the prices at which any
securities may trade at the present time or any time in the future. The
projections used by Montgomery in certain of its analyses are based on numerous
variables and assumptions which are inherently unpredictable and must be
considered not certain of occurrence as projected. Accordingly, actual results
could vary significantly from those contemplated in such projections.

       As described above under "-- Background of and Reasons for the Merger,"
Montgomery's opinion and presentation to the Charter One Board were among the
many factors taken into consideration by the Charter One Board in making its
determination to approve the Merger Agreement.

       Pursuant to the Engagement Letter, Charter One paid Montgomery a fee of
$500,000 upon the execution of the Merger Agreement. Montgomery will receive an
additional $1,500,000 which will be due upon the closing of the Merger.
Accordingly, a significant portion of Montgomery's fee is contingent upon the
closing of the Merger. Charter One has also agreed to reimburse Montgomery for
its reasonable out-of-pocket expenses, including any fees and disbursements for
Montgomery's legal counsel and other experts retained by Montgomery. Charter One
has agreed to indemnify Montgomery, its affiliates, and their respective
partners, directors, officers, agents, consultants, employees and controlling
persons against certain liabilities, including liabilities under the federal
securities laws. In the past, Montgomery and its affiliates have provided
financial advisory and other services to Charter One and have received customary
fees for rendering these services. In particular, Montgomery provided financial
advisory services, including a fairness opinion, to Charter One in regards to
Charter One's merger of equals with FirstFed completed on October 31, 1995. For
these services, Charter One paid Montgomery fees totaling $2,700,000 and agreed
to indemnify Montgomery and its affiliates against certain liabilities. In the
ordinary course of their business, Montgomery and its

                                       30


<PAGE>   43



affiliates actively trade the equity securities of Charter One for their own
account and for the accounts of their customers and, accordingly, may at any
time hold a long or short position in such securities.

OPINION OF RCSB'S FINANCIAL ADVISOR

       RCSB Financial Inc. has retained Lehman Brothers to act as its financial
advisor in connection with the Merger. As part of its role as financial advisor,
Lehman Brothers rendered its written opinion to the RCSB Board, on May 21, 1997,
that as of the date of such opinion, and subject to the factors and assumptions
set forth in such opinion, the Exchange Ratio to be offered to the holders of
RCSB Common Stock by Charter One in the Merger is fair, from a financial point
of view, to the RCSB Stockholders. Lehman Brothers subsequently confirmed its
May 21, 1997 opinion by delivery to the RCSB Board of a written opinion dated as
of the date of this Joint Proxy Statement/Prospectus. THE FULL TEXT OF THE
LEHMAN BROTHERS' OPINION (THE "LEHMAN BROTHERS OPINION") IS ATTACHED HERETO AS
ANNEX C. RCSB'S STOCKHOLDERS MAY READ THE LEHMAN BROTHERS OPINION FOR A
DISCUSSION OF ASSUMPTIONS MADE, MATTERS CONSIDERED AND LIMITS ON THE REVIEW
UNDERTAKEN BY LEHMAN BROTHERS IN RENDERING ITS OPINION. THE SUMMARY SET FORTH IN
THIS JOINT PROXY STATEMENT/PROSPECTUS OF THE LEHMAN BROTHERS OPINION IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO THE FULL TEXT OF THE LEHMAN BROTHERS
OPINION ATTACHED HERETO.

       No limitations were imposed by RCSB on the scope of Lehman Brothers'
investigation or the procedures to be followed by Lehman Brothers in rendering
the Lehman Brothers Opinion, except that RCSB did not authorize Lehman Brothers
to solicit, and Lehman Brothers did not solicit, any indications of interest
from any third party with respect to the purchase of all or a part of RCSB's
business. Lehman Brothers was not requested to and did not make any
recommendation to the RCSB Board as to the form or amount of consideration to be
offered by Charter One to the RCSB stockholders in the Merger, which was
determined through arm's-length negotiations between the respective parties. In
arriving at the Lehman Brothers Opinion, Lehman Brothers did not ascribe a
specific range of value to RCSB or Charter One, but rather made its
determination as to the fairness, from a financial point of view, of the
Exchange Ratio to be offered by Charter One to the RCSB stockholders in the
Merger on the basis of the financial and comparative analyses described below.
The Lehman Brothers Opinion is for the use and benefit of the RCSB Board and was
rendered to the RCSB Board in connection with its consideration of the Merger.
The Lehman Brothers Opinion is not intended to be and does not constitute a
recommendation to any stockholder of RCSB as to how such stockholder should vote
with respect to the Merger. Lehman Brothers was not requested to opine as to,
and its opinion does not address, RCSB's underlying business decision to proceed
with or effect the Merger.

       In arriving at the Lehman Brothers Opinion, Lehman Brothers reviewed and
analyzed: (i) the Merger Agreement and the specific terms of the Merger, (ii)
publicly available information concerning RCSB and Charter One that Lehman
Brothers believed to be relevant to its analyses, (iii) financial and operating
information with respect to the businesses, operations and prospects of RCSB and
Charter One furnished to it by RCSB and Charter One, (iv) a trading history of
Charter One Common Stock and RCSB Common Stock from May, 1992 to the date of the
Lehman Brothers Opinion, and a comparison of such trading histories with those
other companies that it deemed relevant, (v) a comparison of the historical
financial results and present financial condition of RCSB and Charter One with
those of other companies that Lehman Brothers deemed relevant, (vi) a comparison
of the financial terms of the Merger with the financial terms of certain other
recent transactions that Lehman Brothers deemed relevant, and (vii) the
potential pro forma impact on Charter One of the Merger. In addition, Lehman
Brothers had discussions with the management of Charter One and RCSB concerning
their respective businesses, operations, assets, financial conditions and
prospects, and their estimates of cost savings, operating synergies and other
strategic benefits expected to result from a combination of the businesses of
RCSB and Charter One, and undertook such other studies, analyses and
investigations as it deemed appropriate.

       In arriving at the Lehman Brothers Opinion, Lehman Brothers assumed and
relied upon the accuracy and completeness of the financial and other information
used by it without assuming any responsibility for independent verification of
such information and further relied upon the assurances of the managements of
RCSB and Charter One and the combined company following the consummation of the
Merger (the "Combined Company") that they were not aware of any facts or
circumstances that would make such information inaccurate or misleading. With
respect to the financial projections of RCSB and Charter One, upon advice of
RCSB, Lehman Brothers assumed that such projections were reasonably prepared on
a basis reflecting the best currently available estimates and judgments of the
respective managements of RCSB and of Charter One as to the future financial
performance of RCSB, Charter One and the

                                       31


<PAGE>   44



Combined Company, and that RCSB and Charter One would perform, and that the
Combined Company will perform, substantially in accordance with such
projections. Lehman Brothers assumed that the Merger will qualify for
pooling-of-interests accounting treatment and as a reorganization within the
meaning of Section 368(a) of the Code and therefore as a tax-free transaction to
the RCSB stockholders. In arriving at the Lehman Brothers Opinion, Lehman
Brothers did not conduct a physical inspection of the properties and facilities
of RCSB or Charter One and did not make or obtain any evaluations or appraisals
of the assets or liabilities of RCSB or Charter One. In addition, Lehman
Brothers noted that it is not an expert in the evaluation of loan portfolios or
allowances for loan and real estate owned losses and, upon advice of RCSB, it
assumed that the allowances for loan and real estate owned losses provided to it
by RCSB and Charter One and used by it in its analysis and in arriving at the
Lehman Brothers Opinion were, in the aggregate, adequate to cover all such
losses. The Lehman Brothers Opinion was based upon market, economic and other
conditions as they existed on, and could be evaluated as of, the date of the
Lehman Brothers Opinion.

       In connection with the preparation and delivery of the Lehman Brothers
Opinion to the RCSB Board, Lehman Brothers performed a variety of financial and
comparative analyses, as described below. The preparation of a fairness opinion
involves various determinations as to the most appropriate and relevant methods
of financial and comparative analysis and the application of those methods to
the particular circumstances and, therefore, such an opinion is not readily
susceptible to summary description. Furthermore, in arriving at the Lehman
Brothers Opinion, Lehman Brothers did not attribute any particular weight to any
analysis or factor considered by it, but rather made qualitative judgments as to
the significance and relevance of each analysis and factor. Accordingly, Lehman
Brothers believes that its analyses must be considered as a whole and that
considering any portion of such analyses and factors, without considering all
analyses and factors, could create a misleading or incomplete view of the
process underlying the Lehman Brothers Opinion. In its analyses, Lehman Brothers
made numerous assumptions performance, general business and economic conditions
and other matters, many of which are beyond the control of RCSB and Charter One.
Any estimates contained in these analyses are not necessarily indicative of
actual values or predictive of future results or values, which may be
significantly more or less favorable than as set forth therein. In addition,
analyses relating to the value of businesses do not purport to be appraisals or
to reflect the prices at which businesses may actually be sold.

       Purchase Price Analysis. Based upon the Exchange Ratio, the closing price
of Charter One's Common Stock on May 16, 1997 of $47.375 represented a value to
be received by holders of RCSB Common Stock of $43.11 per share. Based on this
implied transaction value per share, Lehman Brothers calculated the purchase
price-to-market, purchase price-to-book, purchase price-to-tangible book,
adjusted-price-to-tangible book (wherein purchase price and tangible book value
was adjusted to reflect a tangible common equity to tangible assets ratio of
5.00%) and purchase price-to-earnings multiples, and the implied core deposit
premium paid in the Merger. The implied transaction value per share yielded a
premium to market price of 29.7% over the closing price of RCSB Common Stock of
$33.25 on May 16, 1997. This analysis also yielded a purchase price-to-book
value multiple of 2.02x, a purchase price-to-tangible book value multiple of
2.07x, a purchase price-to-adjusted tangible book value multiple of 2.69x, a
purchase price-to-latest twelve months earnings multiple of 17.4x (based on
RCSB's earnings for the twelve months ended February 28, 1997), a purchase
price-to-estimated 1997 earnings multiple of 17.0x, and a purchase
price-to-estimated 1998 earnings multiple of 15.3x (based on estimates of RCSB's
1997 and 1998 earnings published by First Call as of May 16, 1997) and a 15%
core deposit premium. First Call is a data service that monitors and publishes a
compilation of earnings estimates produced by selected research analysts
regarding companies of interest to institutional investors.

       Comparable Transaction Analysis. Using publicly available information,
Lehman Brothers reviewed certain terms and financial characteristics, including
historical purchase price-to-earning ratios, the purchase price-to-book ratio,
the purchase price-to-tangible book ratio, the adjusted-price-to-tangible book
ratio, premium-to-market price and the core deposit premium paid at the time of
transaction announcement, of 17 savings institution merger or acquisition
transactions (the "Comparable Thrift Transactions Group") with values greater
than $250 million publicly announced since January 1, 1996, which Lehman
Brothers deemed to be comparable to the present transaction. The Comparable
Thrift Transactions Group considered by Lehman Brothers in its analysis
consisted of the following (identified by acquiror/acquiree): (i) Union Planters
Corp./Leader Financial Corp.; NationsBank Corp./TAC Bancshares; First Union
Corp./Home Financial Corp.; First Union Corp./Center Financial Corp.; Washington
Mutual, Inc./Keystone Holdings, Inc.; MacAndrews & Forbes/Cal Fed Bancorp, Inc.;
HSBC Holdings Plc/First FS&LA of Rochester; ABN-AMRO Holding NV/Standard Federal
Bancorp; and Mercantile Bancorporation/Roosevelt Financial Group (collectively
the "1996 Transactions") and (ii) Sovereign Bancorp/Bankers Corp; CCB Financial
Corp./American Federal Bank; Summit Bancorp/Collective Bancorp; Washington
Mutual/Great Western Financial; Marshall & Ilsley/Security Capital Corp.;

                                       32


<PAGE>   45



TCF Financial Corp./Standard Financial; Astoria Financial Corp./Greater New York
Savings Bank; and Union Planters Corp./Magna Bancorp, Inc. (collectively the
"1997 Transactions") . The median values for the 1996 Transactions for the
purchase price-to-latest twelve months earnings ratio, purchase price-to-book
ratio, purchase price-to-tangible book ratio, adjusted-price-to-tangible book
ratio and premium-to-market price were 15.0x, 1.70x, 1.76x, 2.45x and 23.0%
respectively. The range of values for these parameters was 12.8x to 23.6x, 1.06x
to 3.06x, 1.06x to 3.31x, 1.46x to 4.48x and (3)% to 51%, respectively. These
compared to transaction multiples of 17.4x, 2.02x, 2.07x, 2.69x and 29.7% for
Charter One/RCSB based on the closing price of Charter One Common Stock on May
16, 1997. The range of core deposit premiums paid in these transactions was 4%
to 27%, with a median value of 10% compared to 15% for Charter One/RCSB based on
the closing price of Charter One Common Stock on May 16, 1997. The 1997
Transactions reflected median multiples for the purchase price-to-latest twelve
months earnings ratio, purchase price-to-book ratio, purchase price-to-tangible
book ratio, adjusted-price-to-tangible book ratio and premium-to-market price of
19.2x, 1.99x, 2.12x, 2.93x and 23.0% respectively. These compared to transaction
multiples of 17.4x, 2.02x, 2.07x, 2.69x and 29.7% for Charter One/RCSB based on
the closing price of Charter One Common Stock on May 16, 1997. The median value
for the core deposit premium paid in these transactions was 15%, compared to a
core deposit premium of 15% for Charter One/RCSB based on the closing price of
Charter One Common Stock on May 16, 1997.

       Because the market conditions, rationale and circumstances surrounding
each of the transactions analyzed were specific to each transaction and because
of the inherent differences in the businesses, operations, financial conditions
and prospects of RCSB, Charter One and the companies included in the Comparable
Thrift Transactions Group, Lehman Brothers believed that it was inappropriate
to, and therefore did not, rely solely on the quantitative results of its
analysis and, accordingly, also made qualitative judgments concerning
differences between the characteristics of these transactions and the Merger
that would affect the acquisition values of RCSB and such acquired companies.

       Comparable Company Analyses. Using publicly available information, Lehman
Brothers compared the financial performance and stock market valuation of
Charter One with the following selected savings institutions (the "Comparable
Large-Cap Thrift Group") deemed relevant by Lehman Brothers: H.F. Ahmanson &
Company, Dime Bancorp, Inc., Golden West Financial, GreenPoint Financial Corp.,
People's Bank, MHC, TCF Financial Corp., Washington Mutual, Inc. and Washington
Federal, Inc. Indications of such financial performance and stock market
valuation included: profitability (return on average assets and return on
average equity for the quarter ended March 31, 1997 annualized, of 1.26% and
18.67%, respectively, for Charter One and medians of 1.08% and 14.90%,
respectively, for the Comparable Large-Cap Thrift Group); the ratio of tangible
equity to tangible assets (6.30% for Charter One and a median of 6.23% for the
Comparable Large-Cap Thrift Group); the one year asset-liability gap of (3.75)%
for Charter One and a median of (0.08)% for the Comparable Large-Cap Thrift
Group; the ratio of price-to-estimated 1997 and 1998 earnings (12.0x and 10.8x
for Charter One and a median of 13.0x and 11.4x for the Comparable Large-Cap
Thrift Group); the ratio of price-to-book (2.31x for Charter One and a median of
1.74x for the Comparable Large-Cap Thrift Group); and the ratio of
price-to-tangible-book (2.48x for Charter One and a median of 2.26x for the
Comparable Large-Cap Thrift Group). The ratios for the Comparable Large-Cap
Thrift Group are based on public financial statements as of March 31, 1997,
closing stock market prices on May 16, 1997 and earnings per share based on the
May 16, 1997, median estimates for 1997 and 1998 earnings published by First
Call. The ratios for Charter One are based on public financial statements as of
March 31, 1997, First Call 1997 and 1998 earnings per share estimates as of May
16, 1997, and the closing price for Charter One Common Stock of $47.375 as of
close of business on May 16, 1997.

       In addition, using publicly available information, Lehman Brothers
compared the financial performance and stock market valuation of RCSB with the
following selected savings institutions (the "Comparable Mid-Cap Thrift Group")
deemed relevant by Lehman Brothers: ALBANK Financial Corporation, Astoria
Financial Corporation, Commercial Federal Corporation, Downey Financial Corp.,
First Financial Corp., MAF Bancorp, Inc., Peoples Heritage Financial Group, TR
Financial Corporation, St. Paul Bancorp, Inc., Sovereign Bancorp, Inc., Webster
Financial Corporation and Westcorp. Indications of such financial performance
and stock market valuation included: profitability (return on average assets and
return on average equity for the quarter ended February 28, 1997 annualized, of
0.96% and 12.26%, respectively, for RCSB and medians of 0.95% and 12.45%,
respectively, for the Comparable Mid-Cap Thrift Group); the ratio of tangible
equity to tangible assets (7.65% for RCSB and a median of 6.81% for the
Comparable Mid-Cap Thrift Group); the one year asset-liability gap of (11.12)%
for RCSB and a median of (1.62)% for the Comparable Mid-Cap Thrift Group; the
ratio of price-to-estimated 1997 and 1998 earnings (13.1x and 11.8x for RCSB and
a median of 12.0x and 11.1x for the Comparable Mid-Cap Thrift Group); the ratio
of price-to-book (1.56x for RCSB and a median of 1.62x for the Comparable
Mid-Cap Thrift Group); and the ratio of price-to-tangible-book

                                       33

<PAGE>   46



(1.60x for RCSB and a median of 1.83x for the Comparable Mid-Cap Thrift Group).
The ratios for the Comparable Mid-Cap Thrift Group are based on public financial
statements as of March 31, 1997, closing stock market prices on May 16, 1997 and
earnings per share based on the May 16, 1997 median estimates for 1997 and 1998
earnings published by First Call. The ratios for RCSB are based on public
financial statements as of February 28, 1997, First Call 1997 and 1998 earnings
per share estimates as of May 16, 1997, and the closing price for RCSB Common
Stock of $33.25 as of close of business on May 16, 1997.

       Because of the inherent differences in the businesses, operations,
financial conditions and prospects of Charter One and RCSB and the companies
included in the Comparable Large-Cap and Mid-Cap Thrift Groups, Lehman Brothers
believed that it was inappropriate to, and therefore did not, rely solely on the
quantitative results of its analysis and, accordingly, also made qualitative
judgments concerning differences between RCSB and Charter One and the companies
included in the Comparable Large-Cap and Mid-Cap Thrift Groups which would
affect the trading values of RCSB and Charter One and the respective comparable
companies.

       Discounted Cash Flow Analysis. Lehman Brothers performed a discounted
cash flow analysis to determine a range of present values per share of RCSB
Common Stock assuming RCSB continued to operate as a stand-alone entity. This
range was derived by adding (i) the present value of the estimated future
dividend stream that RCSB would generate in accordance with projections supplied
to Lehman Brothers by RCSB and (ii) the present value of the "terminal value" of
RCSB's Common Stock at the end of year 2001. In connection with this analysis,
RCSB management provided Lehman Brothers with dividend and net income
projections for 1997 through 1999. In determining the 2000 and 2001 dividend
estimates, RCSB's 1999 projected payout ratio of 28.3% was utilized. The 2000
and 2001 earnings projections, which formed the basis of the aforementioned
dividend estimates, were projected using earnings' growth rates ranging from 9%
- - 10%. The "terminal value" of RCSB Common Stock at the end of the period was
estimated by applying a range of price-to-earnings multiples (10x to 16x) to
year 2001 earnings. The dividend stream and terminal values were discounted to
present values using discount rates of 12% to 16%. These rates were chosen to
reflect different assumptions regarding the required rates of return of holders
or prospective buyers of RCSB Common Stock. Based on the foregoing assumptions,
the stand-alone value of RCSB's Common Stock ranged from approximately $35 - $40
per share as compared to a per share transaction value of $43.11, based on the
closing price of Charter One Common Stock on May 16, 1997.

       Pro Forma Merger Analysis. Lehman Brothers analyzed the impact of the
Merger on Charter One's estimated earnings per share based on the May 16, 1997
published First Call estimates for 1998 earnings of Charter One and assumed a
12% earnings per share growth rate from 1998 to 1999 for Charter One. Lehman
Brothers utilized RCSB management earnings forecasts for 1998 and 1999. In
connection with this analysis, management of RCSB and Charter One provided
Lehman Brothers with cost savings estimates from the Merger, which were
incorporated in the Lehman Brothers' analyses. Based on such First Call
estimates, assumed growth rates, management earnings forecasts and management
projections of cost savings, Lehman Brothers concluded that the Merger would be
accretive to the 1998 and 1999 earnings per share of Charter One.

       Contribution Analysis. Lehman Brothers analyzed the respective
contributions of RCSB and Charter One to the Combined Company's pro forma
balance sheet as of February 28, 1997 and pro forma historic net income for 1996
and pro forma net income for the first quarter of 1997 resulting from the
Merger. This analysis showed that RCSB would have contributed 22% of total
assets, 19% of total loans (gross), 23% of total deposits, 25% of total equity,
and 26% of tangible common equity on a pro forma basis as of February 28, 1997.
RCSB's pro forma contribution to the Combined Company's net interest income and
non-interest income for the year ended 1996 would have been 25% and 53%. During
the first quarter of 1997 these results would have been 25% and 54%
respectively. RCSB's contribution to the Combined Company's 1996 and first
quarter 1997 pre-tax net income, adjusted for certain non-recurring items, and
net income, adjusted for certain non-recurring items, would have been 19% and
18% for both time periods respectively. Based upon the Exchange Ratio, RCSB
stockholders would own an estimated 23% of the Combined Company upon the
completion of the Merger.

       Lehman Brothers is an internationally recognized investment banking firm.
Lehman Brothers, as part of its investment banking business, is regularly
engaged in the valuation of businesses and securities in connection with mergers
and acquisitions, negotiated underwritings, competitive bids, secondary
distributions of listed and unlisted securities, private placements and
valuations for corporate and other purposes. The RCSB Board retained Lehman

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<PAGE>   47



Brothers based upon Lehman Brothers' experience, expertise, reputation and its
familiarity with RCSB and the industry in general and because its investment
banking professionals have substantial experience in transactions similar to the
Merger. Lehman Brothers is acting as financial advisor to RCSB in connection
with the Merger. As compensation for its services, RCSB has agreed to pay Lehman
Brothers (i) a retainer fee of $150,000 and (ii) a transaction fee of $4.0
million, contingent upon and payable upon the completion of the Merger. The
retainer fee will be credited against the transaction fee. In addition, RCSB has
agreed to reimburse Lehman Brothers for its out-of-pocket expenses and indemnify
Lehman Brothers and certain related persons and entities against certain
liabilities, including liabilities under securities laws, incurred in connection
with its services thereunder. In the past, Lehman Brothers and its affiliates
have provided financial advisory and other services to both RCSed customary fees
for the rendering of these services. In addition, Lehman Brothers has made a
loan to Leonard S. Simon, Chairman of the Board, President and Chief Executive
Officer of RCSB and a loan to Paula D. Dolan, an officer of RCSB, the proceeds
of which were used to pay the exercise price of options to purchase RCSB Common
Stock (and the withholding taxes associated with such exercise). The loans bear
interest at a floating rate determined with reference to LIBOR and will be
repaid from the proceeds of the eventual sale of the shares of common stock for
which the options were exercised. In the ordinary course of their business,
Lehman Brothers and its affiliates actively trade the debt and equity securities
of RCSB and Charter One for their own account and for the accounts of their
customers and, accordingly, may at any time hold a long or short position in
such securities.

MERGER CONSIDERATION

       The Merger Agreement provides that at the Effective Time all of the
issued and outstanding shares of RCSB Common Stock (other than Excluded Shares),
will be canceled and converted, pursuant to the Exchange Ratio, into .91 shares
of Charter One Common Stock, including the corresponding number of rights
associated with Charter One Common Stock pursuant to the Rights Agreement. For a
discussion of the Rights Agreement, see "COMPARISON OF RIGHTS OF STOCKHOLDERS OF
CHARTER ONE FINANCIAL, INC. AND RCSB FINANCIAL INC. -- Rights Agreements."

       The Exchange Ratio has been fixed at .91. Based on the last reported sale
price for Charter One Common Stock on the Nasdaq National Market on August 18,
1997 ($52.00 per share), the value of .91 shares of Charter One Common Stock as
of that date would have been approximately $47.32. The last reported sale price
for RCSB Common Stock on the Nasdaq National Market on that date was $46.69 per
share. The maximum number of shares of Charter One Common Stock (assuming all
options for RCSB Common Stock are exercised) which may be issued in connection
with the Merger is 13,874,379 which would result in the existing RCSB
shareholders holding 22.6% of the merged entity on a fully diluted basis
(assuming approximately 1.4 million shares of Charter One Common Stock are
issued pursuant to the Haverfield Merger). For a discussion of the Haverfield
Merger see "Recent Developments." The market value of Charter One Common Stock
to be received in the Merger, however, is subject to fluctuation. Fluctuations
in the market price of Charter One Common Stock would result in an increase or
decrease in the value of the Merger Consideration to be received by RCSB
stockholders in the Merger. An increase in the market value of Charter One
Common Stock would increase the market value of the Merger Consideration to be
paid in the Merger. A decrease in the market value of Charter One Common Stock
would have the opposite effect. The market value of the Merger Consideration at
the time of the Merger will depend upon the market value of a share of Charter
One Common Stock at such time. The Merger Consideration was determined through
arm's-length negotiations between Charter One and RCSB, each of whom was advised
during such negotiations by its respective financial advisor. See "THE MERGER --
Background of and Reasons for the Merger."

FRACTIONAL SHARES

       No certificates or scrip representing fractional shares of Charter One
Common Stock will be issued upon the surrender for exchange of certificates
representing RCSB Common Stock, no dividend or distribution of Charter One will
relate to any fractional shares, and such fractional share interests will not
entitle the owner thereof to vote or to any rights as a stockholder of Charter
One. Each stockholder of RCSB who would be entitled to a fractional share in the
Merger will receive a cash payment (without interest) in an amount determined by
multiplying (i) the closing price of one share of Charter One Common Stock as
reported on the Nasdaq National Market on the trading day immediately preceding
the Effective Time by (ii) the fractional share interest to which the holder
would otherwise be entitled pursuant to the terms of the Merger Agreement.

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<PAGE>   48




TREATMENT OF RCSB STOCK OPTIONS

       At the RCSB Record Date, there were RCSB Stock Options outstanding with
respect to 433,727 shares of RCSB Common Stock under the RCSB Option Plans. At
the Effective Time, each vested RCSB Stock Option outstanding under the RCSB
Stock Option Plans as of the date of the Merger Agreement (or required to be
granted to non-employee directors on May 28, 1997) and remaining outstanding
immediately prior to the Effective Time shall be assumed by Charter One and
shall continue to be outstanding, but shall represent an option to purchase
shares of Charter One Common Stock. The number of shares of Charter One Common
Stock subject to such continuing option shall be equal to the number of shares
of RCSB Common Stock subject to the RCSB Stock Option multiplied by .91, with
fractional shares rounded down. The exercise price per share of such converted
option shall be equal to the exercise price of the RCSB Stock Option divided by
 .91, with the exercise price being rounded down to the nearest cent. The
duration and other terms and conditions under the converted option will remain
the same as they existed under the RCSB Stock Option. Unvested RCSB Stock
Options outstanding as of the date of the Merger Agreement that remain
outstanding and unvested immediately prior to the Effective Time shall, at the
Effective Time, be canceled and exchanged for the number of shares of Charter
One Common Stock (based on the closing price of the Charter One Common Stock on
the last trading day immediately prior to the Effective Time) equal to the fair
value of such options, such fair value to be determined by Charter One and RCSB
with the advice of a financial advisor to be selected by Charter One and RCSB,
based on the exercise prices and vesting schedules of such options, the market
prices of Charter One Common Stock and RCSB Common Stock, and an analysis of
option pricing models to be determined at that time. In addition, all stock
appreciation rights outstanding as of the date of the Merger Agreement (other
than those held by Messrs. Simon and Pettinella) shall be canceled in exchange
for cash.

EFFECTIVE TIME

       As soon as possible after the conditions to consummation of the Merger
have been satisfied or waived, and after the receipt of all requisite regulatory
approvals relating to the transactions contemplated by the Merger Agreement and
the approval of the Merger Agreement by the requisite vote of Charter One's and
RCSB's respective stockholders, unless the Merger Agreement has been    
terminated, certificates of merger relating to the Merger will be filed with
the Secretary of State of Delaware and the Michigan Department of Commerce. The
Merger will become effective (i.e., the Effective Time) upon the date of filing
of the certificates of merger with the Secretary of State of Delaware and the
Michigan Department of Commerce.

EXCHANGE OF CERTIFICATES; LOST CERTIFICATES

       Exchange of Certificates. As soon as reasonably practicable after the
Effective Time, Charter One or, at the election of Charter One, an exchange
agent designated by Charter One (the "Exchange Agent") will deliver to each RCSB
holder of record of a certificate or certificates, which immediately prior to
the Effective Time represented outstanding shares of RCSB Common Stock (the
"RCSB Certificates"), a transmittal letter and instructions to be used in
surrendering such RCSB Certificates in exchange for (i) certificates
representing the number of shares of Charter One Common Stock into which their
shares of RCSB Common Stock were converted pursuant to the Merger Agreement, and
(ii) a check representing the amount of cash in lieu of a fractional share, if
any, which such stockholder has the right to receive in respect of the RCSB
Certificates surrendered in connection with the Merger. No interest will be paid
or accrued on the cash in lieu of fractional shares payable to holders of RCSB
Common Stock. RCSB CERTIFICATES REPRESENTING SHARES OF RCSB COMMON STOCK SHOULD
NOT BE FORWARDED TO THE EXCHANGE AGENT UNTIL AFTER RECEIPT OF THE LETTER OF
TRANSMITTAL AND SHOULD NOT BE RETURNED TO RCSB WITH THE ENCLOSED PROXY.

       As of the Effective Time, holders of RCSB Certificates who do not
surrender and exchange such certificates will not be entitled to receive
dividends or any other distributions declared by Charter One until the RCSB
Certificates are so surrendered. Following surrender of such RCSB Certificates
in accordance with the terms of the Merger Agreement, the holders of newly
issued Charter One certificates will be paid, without interest, any dividends or
other distributions with respect to the shares of Charter One Common Stock the
record date for which is after the Effective Time (less any taxes that may have
been imposed thereon).

       Any certificate representing shares of Charter One Common Stock to be
issued in a name other than that in which the RCSB Certificate is registered
must be properly endorsed or otherwise in proper form for transfer, and the

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<PAGE>   49



holder requesting such exchange must pay to the Exchange Agent in advance any
transfer or other taxes in connection therewith or to establish the satisfaction
of the Exchange Agent that such tax has been paid or is not applicable.

       After the Effective Time, there will be no further transfers on the 
records of RCSB of the RCSB Certificates, and if such RCSB Certificates are     
presented to Charter One for transfer, they will be canceled against delivery
of certificates for Charter One Common Stock.

       Lost Certificates. In the event any RCSB Certificate has been lost,
stolen or destroyed, upon the delivery of an affidavit of that fact by the
holder of such certificate and the posting of any bond required by Charter One
or the Exchange Agent, Charter One or the Exchange Agent will issue for such
lost, stolen or destroyed RCSB Certificate, a certificate for the shares of
Charter One Common Stock to which the holder of such RCSB Certificate is
entitled under the terms of the Merger Agreement and any applicable cash in lieu
of a fractional share interest.

INTERESTS OF CERTAIN PERSONS IN THE MERGER

       Certain members of RCSB's management and the RCSB Board have certain
interests in the Merger in addition to their interest as stockholders of RCSB
generally. The RCSB Board was aware of these interests and considered them in
approving and adopting the Merger Agreement and the transactions contemplated
thereby. Set forth below are descriptions of interests of directors and
executive officers of RCSB in the Merger in addition to their interests as
stockholders of RCSB.

       Post-Merger Directors. Charter One has agreed to cause and take all
necessary actions to have Messrs. Simon, Morley, Poe and Tierney, appointed to
the Charter One, Charter Michigan and Charter One Bank Boards following
consummation of the Merger. See "MANAGEMENT AND OPERATIONS AFTER THE MERGER --
Directors After the Merger."

       Non-Qualified Pension Plan for Directors. RCSB maintains a non-qualified
pension plan for its directors which provides for a lump sum payment of the
pension benefit to be made in the event of a change in control. The Merger will
constitute a change in control under this plan. The lump sum payment is
calculated using five or ten times (depending on the years of service) the
average of the total retainer payable to a director during the years 1993-1997.
RCSB Directors Bates, Hanson, Kaufman, Martoche and Poe, each of whom has five
or more years of service on the RCSB Board, will receive a payment of $145,000
following the Effective Time. RCSB Directors Augustine, Morley, Petrou,
Schutzman and Tierney, each of whom has less than five years of service on the
RCSB Board, will receive a payment of $72,500 following the Effective Time.

       Employment Agreements. Charter One has entered into an employment
agreement with Leonard S. Simon. Mr. Simon will be a Vice Chairman of the
Charter One Board and will advise Charter One on issues related to market
development and long-term strategic planning. The term of Mr. Simon's agreement
is four years commencing on the Effective Time. Mr. Simon will receive a salary
of $455,000 per year and such benefits as Charter One provides to its executive
officers, except Mr. Simon will not be eligible to participate in any incentive
bonus, stock or stock option plan. Mr. Simon will, however, be entitled to
receive stock option awards as may be provided to non-employee directors of the
Charter One Board. Mr. Simon's employment contract with Charter One provides
that if a change in control of Charter One and a change in its Chief Executive
Officer occur during the term of his employment agreement, Mr. Simon will be
entitled to terminate his services under such agreement and to receive a lump
sum payment equal to the remaining amount of salary that would otherwise be
payable under the employment agreement. Mr. Simon will also be entitled to
continue to receive any benefits provided to him under his agreement for the
remaining term of the agreement.

       See "-- Senior Executive Severance Plan" below for additional benefits
payable to Mr. Simon in connection with the Merger.

       Charter One has entered into an employment agreement with Edward J.
Pettinella, Executive Vice President of RCSB and Rochester Bank. Mr. Pettinella
will serve as Executive Vice President of Business Development of Charter One
and Charter One Bank. The term of Mr. Pettinella's agreement is three years
commencing on the Effective Time. Annually commencing on the first anniversary
date of the Effective Time the term of Mr. Pettinella's agreement will be
extended for one year, unless Charter One gives Mr. Pettinella 90 days prior
written notice that such term shall

                                       37


<PAGE>   50



not be extended or Mr. Pettinella receives an unsatisfactory performance review
from the Board of Directors of Charter One or Charter One Bank.

       Mr. Pettinella will receive a salary of $288,000 per year and will
participate, in an equitable manner with all other executive officers of Charter
One and Charter One Bank, in performance-based and discretionary bonuses, if
any, in stock and stock option related plans for executive officers of Charter
One, and in all plans of Charter One and Charter One Bank relating to pension,
welfare and other employee and fringe benefit programs.

       The agreement provides that if Mr. Pettinella is involuntarily terminated
during the first two years following the Effective Time, he shall be entitled to
the following: (i) full and immediate vesting of all employee stock options for
securities of Charter One held by him which were not vested as of the date of
termination; (ii) a lump sum payment in the amount of $1,282,358; (iii) Charter
One's rights under and interests in the employee's split dollar life insurance
policy covering Mr. Pettinella will be transferred to Mr. Pettinella without any
payout to Charter One; and (iv) health coverage for 36 months. The agreement
further provides that if Mr. Pettinella is involuntarily terminated after two
years from the Effective Time and Mr. Pettinella has offered to continue to
provide his services as an employee, Charter One will be obligated during the
three years following termination of employment to pay to Mr. Pettinella the
following liquidated damages: (i) monthly payments equal to the sum of
one-twelfth of his annual base salary in effect immediately prior to his date of
termination and one-twelfth of the average annual amount of cash bonus and cash
incentive compensation for the two full fiscal years preceding the date of
termination; (ii) to maintain substantially the same pension, welfare and fringe
benefit coverage for Mr. Pettinella and his dependents on the same terms as were
available to him prior to the date of termination, and (iii) to assign to Mr.
Pettinella the entire interest under his split dollar life insurance policy
without any payment to Charter One. Charter One's obligations are reduced to the
extent Mr. Pettinella receives cash income or health coverage from another
employer.

       For the purposes of Mr. Pettinella's employment contract, the term
"involuntary termination" means termination of Mr. Pettinella (i) by Charter One
without his written consent; or (ii) by Mr. Pettinella by reason of a diminution
of, or interference with, his duties, responsibilities or benefits including any
of the following actions without Mr. Pettinella's written consent: (1) a
requirement that he be based at an employment location more than 50 miles
outside of either Rochester, New York, Detroit, Michigan, or Cleveland, Ohio;
(2) material demotion; (3) a material reduction, by other than a Charter
One-wide reduction in staffing, in the number or seniority of personnel
reporting to him or a reduction in either the frequency or nature of the matters
on which such personnel report to him; (4) a reduction in his salary, or
material adverse change to benefits or perquisites; (5) a material increase in
workload or required hours of work; (6) a requirement to report directly to
anyone other than the Chief Executive Officer; or (iii) by Mr. Pettinella prior
to the second anniversary of the Effective Time, based upon a change in his
employment location to a place more than 35 miles from Rochester, New York.

       Mr. Pettinella's employment agreement also provides that in the event of
an involuntary termination, as described above, within the 12 months preceding
or 24 months following a change in control, he would be entitled to a lump sum
payment equal to 299% of his "base amount" determined under 280G of the Code in
addition to any other payment obligation under his agreement. A change in
control includes the following: (i) an acquisition of securities of Charter One
that is determined by the Charter One Board to constitute a change in control of
Charter One or Charter One Bank within the meaning of the Home Owners' Loan Act
of 1933 as amended (the "HOLA") and 12 C.F.R. Part 574 as in effect at the
Effective Time; (ii) an event that would be required to be reported under Item 1
of Form 8-K, as in effect at the Effective Time, pursuant to Section 13 or 15(d)
of the Exchange Act; (iii) any person (as the term is used in Sections 13(d) and
14(d) of the Exchange Act) is or becomes the beneficial owner (as defined in
Rule 13d-3 of the Exchange Act) directly or indirectly of the securities of
Charter One or Charter One Bank representing 25 percent or more of the combined
voting power of Charter One's outstanding securities; (iv) individuals who are
members of the Charter One Board at the Effective Time (the "Incumbent Board")
cease for any reason to constitute at least a majority thereof excepting when
the election of any such director was approved by a vote of at least
three-quarters of the Incumbent Board or when the nomination for election of any
such director was approved by the nominating committee of the Incumbent Board;
or (v) approval by Charter One stockholders of a plan of reorganization, merger,
consolidation, sale of all or substantially all of the assets of Charter One, a
similar transaction in which Charter One is not the resulting entity, or a
transaction at the completion of which the former stockholders of the acquired
corporation become holders of more than 40 percent of outstanding Charter One
Common Stock where Charter One is the resulting

                                       38


<PAGE>   51



entity of such transaction. A change in control does not result from an
acquisition of securities by a benefit plan of Charter One.

       If the amounts to be paid and the value of benefits under the employment
agreement would cause any amount to be nondeductible by Charter One for federal
income tax purposes pursuant to or by reason of Section 280G of the Code, then
the payments to Mr. Pettinella will be reduced to the extent necessary so as to
maximize amounts and value of benefits to be received by him without causing any
amount to be nondeductible under 280G of the Code.

       Senior Executive Severance Plan. RCSB maintains a Senior Executive
Severance Plan (the "Plan"), in which 13 executive officers of RCSB are
currently participating. The Plan provides that such participants shall receive
a lump sum severance payment in the event the employment of such executive
officer is terminated without "cause" (as defined in the Plan) or by the
executive officer for "good reason" (as defined below) at any time within two
years of a change in control of, or under certain circumstances a potential
change in control of, RCSB. Under the Plan, in the event of a termination as
described above, Messrs. Simon, Pettinella and six other executive officers are
entitled to receive a severance payment equal to three times the sum of such
executive officer's current annual salary and average annu other executive
officers participating in the Plan are entitled to receive a severance payment
equal to two times their current annual salary and average annual bonus for the
preceding three years. "Good reason" under the Plan is generally defined as the
assignment to the executive officer, without his or her consent, of duties
inconsistent with the executive officer's responsibilities and status, a
reduction in compensation or benefits, or a transfer of employment to a location
more than 35 miles from his or her current employment location. If an individual
severance payment becomes nondeductible under Section 280G of the Code, the
payment will be reduced to a level which would no longer be nondeductible under
Section 280G, unless the amount that the executive officer would receive on an
after-tax basis is reduced by more than $10,000. In the event all of the
executive officers participating in the Plan (excluding Messrs. Simon and
Pettinella) are terminated by Charter One without cause or by such executive
officers for good reason, the aggregate lump sum severance payable to the
executive officers (other than Messrs. Simon and Pettinella) by Charter One
under the Plan would be approximately $2.4 million.

       Furthermore, in addition to the lump sum severance payment, such
executive officers would be entitled to continued medical, dental and life
insurance coverage for two or three years, depending upon their agreement, a
pro-rata portion of the incentive payment for the final year of employment and
transfer of the whole life insurance policy which covers the executive officer
and on which the executive officer and RCSB have shared the cost of premiums.

       As a consequence of the Merger, Mr. Simon will no longer hold the
positions of Chairman, President and Chief Executive Officer. See "--Employment
Agreements" above. RCSB and Mr. Simon agree that his change in position
constitutes "good reason" under the terms of the Plan. Accordingly, in
settlement of his rights under the Plan, Mr. Simon will receive a payment of
$1,606,792 which Charter One has agreed to pay. Upon consummation of the Merger,
Mr. Pettinella is not expected to receive any payments under the Plan, subject
to the execution of an employment agreement with Charter One.

       Stock Option Plans. The directors and executive officers of RCSB
currently participate in RCSB's 1986 Stock Option Plan and 1992 Stock-Based
Compensation Plan. At the 1996 RCSB Annual Shareholder Meeting held in April
1997, RCSB shareholders approved the RCSB 1997 Stock Option Plan, although no
options have been granted to date under this plan.

       The directors and executive officers of RCSB currently hold, in the
aggregate, options to purchase 383,338 shares of RCSB Common Stock. Upon
consummation of the Merger, such options will be converted into options to
purchase Charter One Common Stock. See "THE MERGER - Treatment of RCSB Stock
Options." Furthermore, Messrs. Simon and Pettinella currently have 21,300 and
6,000 stock appreciation rights which were granted to them under RCSB's 1992
Stock-Based Compensation Plan, respectively. Upon consummation of the Merger,
such stock appreciation rights will be assumed by Charter One. No other
directors or executive officers of RCSB have any stock appreciation rights.

       Indemnification; Insurance. Pursuant to the Merger Agreement, Charter One
has agreed that for a period of six years following the Effective Time, Charter
One shall indemnify, defend and hold harmless the present and former directors,
officers and employees of RCSB and its subsidiaries to the fullest extent that
RCSB would have been

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<PAGE>   52



permitted under the DGCL and the RCSB Certificate of Incorporation and the RCSB
bylaws (the "RCSB Bylaws") in effect on the date of the Merger Agreement.
Charter One will also advance expenses as incurred to the fullest extent
permitted under applicable law so long as the person to whom expenses are
advanced provides an undertaking to repay such advances if it is ultimately
determined that such person is not entitled to indemnification. Charter One
shall cause the persons serving as officers and directors of RCSB and its
subsidiaries immediately prior to the Effective Time to be covered for a period
of six years following the Effective Time by the directors' and officers'
liability insurance policy maintained by Charter One and Charter One Bank
(provided that Charter One may substitute or cause RCSB to substitute therefor
single premium tail coverage with a policy limit equal to RCSB's existing annual
coverage limit) with respect to acts or omissions occurring prior to the
Effective Time which were committed by such officers and directors in their
capacity as such, provided that the additional premium costs to Charter One does
not exceed 200 percent of RCSB's present annual premium cost (the "Maximum
Amount") and that the insurance is available. If the amount of the premium
necessary to maintain or procure such coverage exceeds the Maximum Amount,
Charter One shall use all reasonable efforts to maintain the most advantageous
policies of directors' and officers' insurance obtainable for a premium equal 
to the Maximum Amount.

REPRESENTATIONS AND WARRANTIES

       In the Merger Agreement, each of RCSB and Rochester Bank, on the one
hand, and Charter One and Charter One Bank, on the other hand, have made
representations and warranties relating to, among other things, their
organization, authority to enter into the Merger Agreement and related
transactions, absence of conflicts, inapplicability of anti-takeover provisions,
capitalization, financial statements, subsidiaries, filings, reports, compliance
with laws, litigation, licenses, taxes, insurance, loans, allowance for possible
loan losses, benefit plans, compliance with environmental laws, contracts and
commitments, defaults, operations, absence of undisclosed liabilities, assets,
indemnification, insider interests, broker/finder fees, accuracy of information,
fairness opinions, governmental approvals and other matters. For detailed
information on such representations and warranties, see the Merger Agreement
attached hereto at Annex A.

CONDITIONS TO THE MERGER

       Conditions to the Obligations of the Parties. Notwithstanding any other
provision of the Merger Agreement, the obligations of Charter One, Charter
Michigan and Charter One Bank on the one hand, and RCSB and Rochester Bank on
the other hand, to consummate the Merger are subject to the following conditions
precedent (except as to those which Charter One or RCSB may choose to waive):
(i) no preliminary or permanent injunction or other order by any federal or
state court which prevents the consummation of the Merger shall have been issued
and shall remain in effect; nor shall there be any third party proceeding
pending to prevent the consummation of the Merger; (ii) the parties shall have
received all applicable regulatory approvals and consents to consummate the
transactions contemplated in the Merger Agreement and all required waiting
periods shall have expired; (iii) the respective holders of a majority of the
outstanding shares of Charter One Common Stock and RCSB Common Stock shall have
adopted the Merger Agreement; (iv) the Registration Statement shall have been
declared effective under the Securities Act and no stop orders shall be in
effect and no proceedings for such purpose shall be pending or threatened by the
Commission; (v) each party shall have received a tax opinion that the Merger
will be treated as a tax-free reorganization under Section 368(a) of the Code;
and (vi) the Charter One Common Stock to be issued to holders of RCSB Common
Stock shall have been approved for listing on the Nasdaq National Market subject
to official notice of issuance.

       Conditions to the Obligations of Charter One, Charter Michigan and
Charter One Bank. Notwithstanding any other provision of the Merger Agreement,
the obligations of Charter One, Charter Michigan and Charter One Bank to
consummate the Merger are subject to the following conditions precedent (except
as to those which Charter One may choose to waive): (i) all of the
representations and warranties made by RCSB and Rochester Bank in the Merger
Agreement and in any documents or certificates provided by RCSB and Rochester
Bank shall have been true and correct in all material respects as of the date of
the Merger Agreement and as of the Effective Time as though made on and as of
the Effective Time, subject to the cure provisions contained in the Merger
Agreement; (ii) RCSB and Rochester Bank shall have performed in all material
respects all obligations and shall have complied in all material respects with
all agreements and covenants required by the Merger Agreement to be performed or
complied with by them prior to or at the Effective Time, subject to the cure
provisions contained in the Merger Agreement; (iii) there shall not have been
any action taken or any statute, rule, regulation or order enacted, promulgated
or issued or deemed applicable to the Merger by any federal or state government
or governmental agency or instrumentality or court, which would prohibit

                                       40


<PAGE>   53



ownership or operation of all or a portion of the business or assets of RCSB or
any RCSB subsidiary by Charter One, Charter Michigan or Charter One Bank, or
would compel Charter One, Charter Michigan or Charter One Bank to dispose of all
or a portion of the business or assets of RCSB or any RCSB subsidiary, as a
result of the Merger Agreement, or which would render any party thereto unable
to consummate the transactions contemplated by the Merger Agreement; (iv) RCSB
shall not suffer a Material Adverse Effect (as defined in the Merger Agreement)
after the execution of the Merger Agreement; (v) no regulatory authority shall
impose any -standard or unduly burdensome condition relating to the Merger as
determined in the reasonable judgment of Charter One, (vi) Charter One shall
have received the opinion of Harris Beach & Wilcox, LLP, counsel to RCSB, in the
form specified in the Merger Agreement; (vii) Charter One shall have received a
certificate signed by the President and Chief Executive Officer of RCSB and
Rochester Bank, dated as of the Effective Time, certifying that based upon his
best knowledge, the conditions set forth in items (i), (ii), (iv), (xii) and
(xiii) of this paragraph have been satisfied; (viii) the directors of RCSB who
are stockholders of RCSB shall have executed and delivered to Charter One the
Voting Agreements; (ix) Charter One shall have received from Deloitte & Touche
L.L.P., a letter in the form then customarily issued by such accountants in
transactions such as the Merger, to the effect that the Merger will qualify for
pooling of interests accounting treatment; (x) Charter One shall have received
the written affiliates' agreements from all executive officers and directors of
RCSB and all stockholders who are affiliates; (xi) within five days prior to
mailing the Joint Proxy Statement/Prospectus to stockholders of Charter One,
Charter One shall have received from Montgomery a written opinion to the effect
that the Merger is fair to the Charter One stockholders from a financial point
of view; (xii) from November 30, 1996 to the Closing Date (as defined in the
Merger Agreement), the average monthly originations of auto loans and leases of
RCSB and its subsidiaries shall not exceed $92,000,000 (which amount was
increased to $125,000,000 pursuant to Charter One's written consent on July 23,
1997); and (xiii) monthly net charge-offs for the auto indirect portfolio of
RCSB and its subsidiaries based upon current charge-off accounting methodology
utilized by American Credit Services, Inc., on the date of the Merger Agreement
shall not exceed .125 percent of the monthly average outstanding portfolio
balance for any two calendar months commencing May 1997.

       Conditions to the Obligations of RCSB and Rochester Bank. Notwithstanding
any other provision of the Merger Agreement, the obligations of RCSB and
Rochester Bank to consummate the Merger are subject to the following conditions
precedent (except as to those which RCSB may choose to waive): (i) all of the
representations and warranties made by Charter One in the Merger Agreement and
in any documents or certificates provided by Charter One shall have been true
and correct in all material respects as of the date of the Merger Agreement and
as of the Effective Time as though made on and as of the Effective Time, subject
to the cure provisions contained in the Merger Agreement; (ii) Charter One shall
have performed in all material respects all obligations and shall have complied
in all material respects with all agreements and covenants required by the
Merger Agreement to be performed or complied with by it prior to or at the
Effective Time, subject to the cure provisions contained in the Merger
Agreement; (iii) Charter One shall not have suffered a Material Adverse Effect
after the execution of the Merger Agreement; (iv) RCSB shall have received the
opinion of Silver, Freedman & Taff, L.L.P., counsel to Charter One, in the form
specified in the Merger Agreement; (v) RCSB shall have received a certificate
signed by the President and Chief Executive Officer of Charter One, dated as of
the Effective Time, that based upon his best knowledge, the conditions set forth
in items (i), (ii) and (iii) of this paragraph have been satisfied; and (vi)
within five days prior to the mailing of this Joint Proxy Statement/Prospectus
to stockholders of RCSB, RCSB shall have received from Lehman Brothers a written
opinion to the effect that the Merger Consideration is fair to the RCSB
stockholders from a financial point of view.

       There can be no assurance that the conditions to consummation of the
Merger will be satisfied or waived. In the event the conditions to either
party's obligations become impossible of satisfaction in any material respect,
the other party may elect to terminate the Merger Agreement. See " -- Amendment;
Termination; Liabilities and Remedies for Breach."

       For detailed information on conditions to the Merger, see the Merger
Agreement attached hereto at Annex A.

REGULATORY APPROVALS

       Consummation of the Merger is subject to the approval of the OTS and the
New York Superintendent. Charter One filed an application for approval of the
Merger with the OTS on July 11, 1997 and the New York Superintendent on July 18,
1997. Although Charter One anticipates receiving approval of the Merger from the
OTS and New York Superintendent in the third quarter of 1997, there can be no
assurance as to the timing of such approvals or that they will be obtained.

                                       41


<PAGE>   54




       The Merger may not be consummated for a period of 30 days after receipt
of the OTS's final approval, unless the OTS has not received any adverse comment
from the Department of Justice during the first 15 days following final
approval, in which case the Merger may be consummated on or after the 15th day
after final approval by the OTS.

       It is a condition to the consummation of the Merger that all requisite
regulatory approvals be obtained without any nonstandard or unduly burdensome
condition relating to the Merger, as determined in Charter One's reasonable
judgment. There can be no assurance that such approvals will not contain terms,
conditions or requirements which cause such approvals to fail to satisfy such
conditions to the consummation of the Merger. See "-- Conditions to the Merger."

AMENDMENT; TERMINATION; LIABILITIES AND REMEDIES FOR BREACH

       Amendment. The Merger Agreement may be amended by the parties thereto by
action taken by their respective Boards of Directors at any time before or after
approval by the stockholders of Charter One and RCSB but, after such approval,
no amendment shall be made which changes the form of consideration or the value
of the consideration to be received by the stockholders of RCSB without the
approval of the stockholders of Charter One and RCSB.

       Termination. The Merger Agreement may be terminated at any time prior to
the Effective Time: (i) by the mutual written consent of the Boards of Directors
of Charter One and RCSB; (ii) by Charter One or RCSB if there shall have been a
final judicial or regulatory determination (as to which all periods for appeal
shall have expired and no appeal shall be pending) that any material provision
of the Merger Agreement is illegal, invalid or unenforceable (unless the
enforcement thereof is waived by the affected party) or denying any regulatory
application the approval of which is a condition precedent to a party's
obligations under the Merger Agreement; (iii) at any time on or before December
31, 1997, by Charter One or RCSB in the event that any of the conditions
precedent to the obligations of the other party to the Merger are rendered
impossible to be satisfied or fulfilled by December 31, 1997 (other than by
reason of a breach by the party seeking to terminate); (iv) by Charter One or
RCSB, in the event of a material breach by the other party of any
representation, warranty, covenant, obligation or agreement contained in the
Merger Agreement or in any schedule or document delivered pursuant thereto, and
which breach cannot be or is not cured within thirty (30) days after written
notice of such breach is given by the non-breaching party to the party
committing such breach; or (v) by Charter One or RCSB on or after December 31,
1997, in the event the Merger has not been consummated by such date (provided,
however, that this right to terminate shall not be available to any party who is
then in material breach of any representation, warranty, covenant or other
agreement contained in the Merger Agreement).

       Liabilities and Remedies for Breach. In the event that the Merger
Agreement is terminated by a party solely by reason of the willful and material
breach by the other party of any of its representations or warranties or the
material breach by a party of any of its covenants or agreements contained in
the Merger Agreement, the aggrieved party shall be entitled to such remedies and
relief against the breaching party as are available at law or in equity,
including specific performance. See "CERTAIN RELATED MATTERS - Stock Option
Agreement."

CONDUCT OF BUSINESS PENDING THE MERGER

       The Merger Agreement contains covenants of RCSB concerning the conduct of
its business. The covenants remain in effect until the Effective Time or until
the Merger Agreement has been terminated. They include, among other things, that
RCSB and its subsidiaries shall continue to carry on their respective businesses
and discharge or incur obligations and liabilities, only in the usual, regular
and ordinary course of business, and RCSB and its subsidiaries shall not, among
other things, without the prior written consent of Charter One: (i) issue any
capital stock or any stock appreciation rights, options, warrants, or other
rights to subscribe for or purchase capital stock or any securities convertible
into or exchangeable for any capital stock, except pursuant to the RCSB Stock
Options outstanding on the date of the Merger Agreement (or required to be
granted to non-employee directors on May 28, 1997) or the Stock Option
Agreement; (ii) directly or indirectly redeem, purchase or otherwise acquire any
capital stock or ownership interests of RCSB or any RCSB subsidiary; (iii)
effect a reclassification, recapitalization, split-up, exchange of shares,
readjustment or other similar change in or to any capital stock or otherwise
reorganize or recapitalize; (iv) change its charter, certificate of
incorporation, or bylaws; (v) enter into or modify any employment agreement,
severance agreement, change in control agreement, or plan relative to the
foregoing; or grant any increase (other than ordinary and normal increases to
employees other than executive officers consistent with past practices) in the
compensation payable or to become payable to directors, officers or employees or
except as required by law, pay or agree to pay any bonus,

                                       42


<PAGE>   55



or adopt or make any change in any bonus, insurance, pension or other RCSB
benefit plan; (vi) except for the short-term renewal of FHLB advances
outstanding as of the date of the Merger Agreement, raising funds against its
existing line of credit with the FHLB for durations not in excess of three
years, and deposit-taking and repurchase transactions in the ordinary course of
its business, borrow or agree to borrow any funds or indirectly guarantee or
agree to guarantee any obligations of others; (vii) except in the ordinary
course of business consistent with prior practice, change the pricing or
methodology for pricing any of its loan products; (viii) make any material
changes in its policies concerning loan underwriting or which persons may
approve any significant or material loan; (ix) enter into any securities
transaction for its own account or purchase or otherwise acquire any investment
security for its own account other than U.S. Treasury obligations with
maturities of less than one year and deposits in an overnight account at the
FHLB of New York, provided Charter One's consent shall not be unreasonably
withheld or delayed relating to the purchase of other readily marketable
investment securities; (x) increase or decrease the rate of interest paid on
time deposits or on certificates of deposit, except in a manner and pursuant to
policies consistent with past practices; (xi) enter into, modify or extend any
agreement, contract or commitment out of the ordinary course of business or
having a term in excess of six months and involving an expenditure in excess of
$50,000, other than letters of credit, loan agreements, deposit agreements, and
other lending, credit and deposit documents made in the ordinary course of
business; (xii) except in the ordinary course of business and in substantial
compliance with the 1997 RCSB Business Plan, place on any of its assets or
properties any mortgage, pledge, lien charge, or other encumbrance; (xiii)
cancel any material indebtedness owing to it or any claims which it may possess
or waive any rights of material value; (xiv) sell or otherwise dispose of any
real property or any material amount of tangible or intangible personal
property, except in the ordinary course of business consistent with past
practices; (xv) foreclose upon or otherwise take title to or possession or
control of any real property without first obtaining a phase one environmental
report thereon; provided, however, that Rochester Bank and its subsidiaries
shall not be required to obtain such a report with respect to single family,
non-agricultural residential property of one acre or less to be foreclosed upon
unless it has reason to believe that such property might contain hazardous
substances (on June 18, 1997, Charter One consented to remove the acreage
limitation set forth under this item); (xvi) knowingly or wilfully commit
any act or fail to commit any act which will cause a material breach of any
material agreement, contract or commitment; (xvii) knowingly or wilfully
violate any law, statute, rule, governmental regulation, or order in any
material respect; (xviii) purchase any fixed asset where the amount paid or
committed therefor is in excess of $50,000, except for written commitments
outstanding on or prior to May 15, 1997; (xix) engage in any activity or
transaction(s) that could result in the consolidated loan servicing assets of
RCSB and its subsidiaries to exceed $130,000,000; (xx) except as permitted
under subpart (xxi) immediately below, enter into or acquire any derivative
contract or structured note; (xxi) except in connection with hedging activities
consistent with past practices pertaining to residential first mortgage loan
originations, enter into any new, or modify, amend or extend the terms of any
existing contracts relating to the purchase or sale of financial or other
futures, or any put or call option relating to cash, securities or commodities
or any interest rate swap agreements or other agreements relating to the
hedging of interest rate risk; (xxii) in the case of Rochester Bank, (A)
voluntarily make any material changes in or to its asset or deposit mix other
than those contemplated by the 1997 RCSB Business Plan, (B) voluntarily convert
any "Community Value" checking account to any other type of checking account,
(C) open any new branch, deposit taking facility or loan production office
other than the two new offices in construction as of May 21, 1997, (D) close
any existing branch or other facility, or (E) incur any liability or obligation
relating to retail banking and branch merchandising, marketing and advertising
activities and initiatives in excess of the amounts budgeted in the 1997 RCSB
Business Plan; (xxiii) in the case of RCSB's subsidiaries (other than Rochester
Bank), (A) open any sales, hub or other type of office or facility or (B) hire
any additional employees except to fill current job vacancies and future
vacancies arising from attrition; or (xxiv) agree in writing or otherwise to    
take any of the foregoing actions or engage in any of the foregoing activities.
FOR A MORE DETAILED AND COMPREHENSIVE LIST OF THE RESTRICTIONS ON THE CONDUCT
OF RCSB'S OPERATIONS PENDING THE MERGER, SEE THE MERGER AGREEMENT ATTACHED
HERETO AT ANNEX A.

       RCSB has also covenanted that during the period from July 1, 1997 until
the last day of the calendar month coinciding with or immediately preceding the
consummation of the transactions contemplated in the Merger Agreement, RCSB and
its subsidiaries shall cause units with a Fair Issac Corporation Auto Score (a
credit score provided by credit bureaus based on selected data), as calculated
by RCSB or its subsidiary consistent with past practice, of 599 or less not to
exceed eight percent of the total auto unit production originated by RCSB and
its subsidiaries during such period on a consolidated basis.

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<PAGE>   56



       RCSB may not declare or pay any dividend or make any other distribution
with respect to its capital stock whether in cash, stock or other property,
after the date of the Merger Agreement without the written consent of Charter
One, except that nothing contained in the Merger Agreement will preclude RCSB
from declaring and paying cash dividends on RCSB Common Stock at a quarterly
rate not to exceed $.15 per share in a manner, on dates and with respect to
record dates consistent with past practice (except for the payment of the last
dividend prior to consummation of the Merger which shall be coordinated with,
and subject to the approval of, Charter One to preclude duplication of
dividends). The RCSB Board is under no obligation to pay dividends on RCSB
Common Stock.

EXPENSES

       All expenses incurred in connection with the Merger Agreement and the
transactions contemplated thereby are to be paid by the party incurring such
expenses.

ACCOUNTING TREATMENT

       The Merger is intended to be accounted for under the pooling of interests
method of accounting. Under the pooling of interests method of accounting, the
historical cost basis of the assets and liabilities of Charter One and RCSB will
be combined and carried forward at their previously recorded amounts, and the
stockholders' equity accounts of Charter One and RCSB will be combined on
Charter One's, consolidated statement of financial condition. Income and other
financial statements of Charter One issued after consummation of the Merger will
be restated retroactively to reflect the consolidated operations of Charter One
and RCSB as if the Merger had taken place prior to the periods covered by such
financial statements. It is a condition of the Merger that Charter One receive a
letter from Deloitte & Touche LLP to the effect that the Merger will qualify for
pooling of interests accounting treatment.

       The unaudited pro forma combined financial information contained in this
Joint Proxy Statement/Prospectus has been prepared using the pooling of
interests accounting method. See "UNAUDITED PRO FORMA COMBINED FINANCIAL
STATEMENTS."

RESALE OF CHARTER ONE COMMON STOCK BY AFFILIATES

       The shares of Charter One Common Stock to be issued to stockholders of
RCSB in connection with the Merger will be registered under the Securities Act
and will be freely transferable under the Securities Act, except for shares
issued to any stockholder who may be deemed to be an "affiliate" (as defined
under the Securities Act, but generally including directors, certain executive
officers and ten percent or more stockholders) of RCSB or Charter One at the
time of the Special Meetings.

       Rules 144 and 145 promulgated under the Securities Act restrict the sale
of Charter One Common Stock received in the Merger by affiliates and certain of
their family members and related interests. Generally speaking, during the one
year following the Effective Time, affiliates of Charter One and RCSB may not
resell publicly the Charter One Common Stock received by them in connection with
the Merger except in compliance with certain limitations as to the amount of
Charter One Common Stock sold in any three-month period and as to the manner of
sale. After the one-year period, such affiliates of RCSB who are not affiliates
of Charter One may resell their shares without restriction. The ability of
affiliates to resell shares of Charter One Common Stock received in the Merger
under Rule 144 or 145 as summarized herein generally will be subject to Charter
One having satisfied its Exchange Act reporting requirements for specified
periods prior to the time of sale. Affiliates also would be permitted to resell
Charter One Common Stock received in the Merger pursuant to an effective
registration statement under the Securities Act covering such shares or an
available exemption from the Securities Act registration requirements. This
Joint Proxy Statement/Prospectus does not cover any resales of Charter One
Common Stock received by persons who may be deemed to be affiliates of Charter
One or RCSB.

       The Merger Agreement provides that RCSB will use its best efforts to
cause each director, executive officer and other person who is deemed by RCSB to
be an affiliate (for purposes of Rule 145 and for purposes of qualifying the
Merger for the pooling of interests method of accounting treatment) of RCSB to
execute and deliver a written agreement with Charter One intended to ensure
compliance with the Securities Act and to ensure that the Merger will qualify as
a pooling of interests.

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<PAGE>   57



       Commission guidelines regarding qualifying for the pooling of interests
method of accounting also limit sales by affiliates of Charter One and RCSB in
the Merger. Commission guidelines indicate that the pooling of interests method
of accounting generally will not be challenged on the basis of sales by
affiliates if they do not dispose of any of the shares of either combining
company they owned prior to the consummation of a merger or shares of the
surviving company received in connection with a merger during the period
beginning 30 days before the merger and ending when financial results covering
at least 30 days of post-Merger operations of the surviving company have been
published. Pursuant to the agreements to be entered into with the RCSB
affiliates, Charter One will agree to publish such financial results within 30
days after the end of the first calendar month which includes at least 30 days
of operations.

CERTAIN FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER

       The following discussion is a summary description of the anticipated
material federal income tax consequences of the Merger to Charter One, RCSB and
RCSB stockholders who are citizens or residents of the United States. The
following discussion does not purport to be a complete analysis or listing of
all potential tax effects relevant to a decision whether to vote in favor of
approval of the Merger Agreement and the Merger. Further, the discussion does
not address the tax consequences that may be relevant to a particular RCSB
stockholder subject to special treatment under certain federal income tax laws,
such as dealers in securities, banks, insurance companies, tax-exempt
organizations, non-United States persons and stockholders who acquired their
shares as compensation, nor any consequences arising under the laws of any
state, locality or foreign jurisdiction. The discussion is based upon the
Internal Revenue Code of 1986, as amended, Treasury regulations thereunder and
administrative rulings and court decisions as of the date hereof. All of the
foregoing are subject to change, and any such change could affect the continuing
validity of this discussion.

               HOLDERS OF RCSB COMMON STOCK ARE URGED TO CONSULT THEIR TAX
ADVISERS AS TO THE PARTICULAR EFFECT OF THEIR OWN PARTICULAR FACTS AND
CIRCUMSTANCES ON THE FEDERAL INCOME TAX CONSEQUENCES OF THE MERGER TO THEM, AND
ALSO AS TO THE EFFECT OF ANY STATE, LOCAL, FOREIGN AND OTHER FEDERAL TAX LAWS.

       Under current federal income tax law, and based upon assumptions and
representations to be made by Charter One and RCSB, and assuming that the Merger
is consummated in the manner set forth in the Merger Agreement, it is
anticipated that the following federal income tax consequences would result: (i)
the Merger will constitute a tax-free reorganization within the meaning of
Section 368(a) of the Code and neither Charter One nor Charter Michigan nor RCSB
will recognize any gain or loss as a direct consequence of consummating the
Merger; (ii) no gain or loss will be recognized by any RCSB stockholder upon the
exchange of RCSB Common Stock solely for Charter One Common Stock pursuant to
the Merger, and the tax basis of the Charter One Common Stock received by each
stockholder of RCSB who exchanges RCSB Common Stock for Charter One Common Stock
in the Merger will be the same as the aggregate tax basis of the RCSB Common
Stock surrendered in exchange therefor (subject to any adjustments required as
the result of receipt of cash in lieu of a fractional share interest in Charter
One Common Stock); (iii) the holding period of the shares of Charter One Common
Stock received by a RCSB stockholder in the Merger will include the holding
period of the RCSB Common Stock surrendered in exchange therefor, provided that
such shares of RCSB Common Stock were held as a capital asset by such
stockholder at the Effective Time; and (iv) cash received in the Merger by a
RCSB stockholder in lieu of a fractional share interest of Charter One Common
Stock will be treated as having been received as a distribution in full payment
in exchange for the fractional share interest of Charter One Common Stock which
such stockholder would otherwise be entitled to receive, and will qualify as
capital gain or loss (assuming the RCSB Common Stock surrendered in exchange
therefor was held as a capital asset by such stockholder at the Effective Time).

       Silver, Freedman & Taff, L.L.P., counsel to Charter One, will render an
opinion, dated as of the Effective Time, that the Merger will qualify as a
tax-free reorganization under the Code with the consequences set forth above.
The Silver, Freedman & Taff, L.L.P. opinion will be based entirely upon the
Code, regulations then in effect or proposed thereunder, then-current
administrative rulings and practice and judicial authority, all of which would
be subject to change, possibly with retroactive effect. Subject to waiver by
both Charter One and RCSB, which waiver is not expected to be made, consummation
of the Merger is conditioned upon the receipt by Charter One and RCSB of the
opinion of Silver, Freedman & Taff, L.L.P. See "-- Conditions to the Merger."

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<PAGE>   58



       In the event that Silver, Freedman & Taff, L.L.P. is unable to furnish
the opinion as described herein, the tax consequences of the Merger are
materially different than described above, and both Charter One and RCSB waive
the condition of receipt of the opinion of Silver, Freedman & Taff, L.L.P.,
Charter One stockholders and RCSB stockholders will be resolicited and provided
updated information regarding the material federal income tax consequences of
the Merger prior to consummation of the Merger.

       No ruling has been or will be requested from the Internal Revenue Service
("IRS"), including any ruling as to federal income tax consequences of the
Merger to Charter One, RCSB or RCSB stockholders. Unlike a ruling from the IRS,
the opinions of counsel are not binding on the IRS. There can be no assurance
that the IRS will not take a position contrary to the positions reflected in
such opinions or that such opinions would be upheld by the courts if challenged.

NASDAQ LISTING

       Both Charter One Common Stock and RCSB Common Stock currently are quoted
on the Nasdaq National Market. It is a condition to consummation of the Merger
that the Charter One Common Stock to be issued to the stockholders of RCSB
pursuant to the Merger Agreement will be quoted on the Nasdaq National Market.
See "-- Conditions to the Merger."

                   MANAGEMENT AND OPERATIONS AFTER THE MERGER

DIRECTORS AFTER THE MERGER

       Immediately following consummation of the Merger Leonard S. Simon, the
current Chairman, President and Chief Executive Officer of RCSB and Rochester
Bank will be appointed to the Charter One Board to serve for a term expiring at
Charter One's annual meeting held in the year 2000. Mr. Simon will serve as a
Vice Chairman of the Charter One Board. Furthermore, subject to adoption of the
Amendment by Charter One stockholders, the Charter One Board will adopt a
resolution increasing the size of the current Charter One Board to 19 members
and will appoint Messrs. Michael P. Morley, Ronald F. Poe and John P. Tierney,
each of whom is currently serving as a director of RCSB. Messrs. Morley, Poe and
Tierney will be appointed to such classes of directors of Charter One as the
Charter One Board shall designate. Messrs. Simon, Morley, Poe and Tierney will
each be appointed to the Board of Directors of Charter Michigan and, subject to
regulatory approval, to the Charter One Bank Board, to serve for the same term
as his term as a director of Charter One. See "AMENDMENT TO THE SECOND RESTATED
CERTIFICATE OF INCORPORATION OF CHARTER ONE FINANCIAL, INC."

                                       46


<PAGE>   59



       Set forth below is certain information, as of the date of this Joint
Proxy Statement/Prospectus, with respect to each individual who currently is, or
is expected to become, a member of the Charter One Board and the Charter One
Bank Board as of the Effective Time.

<TABLE>
<CAPTION>

                                   YEAR BECAME A
                                  DIRECTOR OF CHARTER                                      PRINCIPAL OCCUPATION
        NAME                       ONE(C) OR RCSB(R)         AGE                           DURING PAST FIVE YEARS
- ----------------------            -------------------        ---           -----------------------------------------------------
<S>                                    <C>                    <C>          <C>                                                   
Eugene B. Carroll, Sr.                 1987(C)                72           President of Employer Sponsored Plans, Inc. (third-
                                                                           party health plan administrator); agent for New
                                                                           England Mutual Life Insurance Co.
Phillip W. Fisher                      1997(C)                46           Chairman of Durakon Industries, Principal of the
                                                                           Fisher Group, Partner in the Chase Company and
                                                                           General Partner in Edcor Data Services
Denise M. Fugo                         1993(C)                43           President of City Life Inc. (restaurant, banquet and
                                                                           catering company)
Mark D. Grossi                         1992(C)                42           Executive Vice President of Charter One and
                                                                           Executive Vice President/Retail Banking of Charter
                                                                           One Bank since September 1992; President and
                                                                           Chief Executive Officer of First American Savings
                                                                           Bank from December 1989 through September 1992
Charles M. Heidel                      1980(C)(1)             71           Retired President, Chief Operating Officer and
                                                                           Director of The Detroit Edison Company (public
                                                                           utility)
Charles F. Ipavec                      1987(C)                74           General counsel to Charter One Bank; President of
                                                                           LaPorte and Ipavec Co., L.P.A.
Charles John Koch (2)                  1987(C)                51           Chairman of the Board, President and Chief
                                                                           Executive Officer of Charter One and Charter One
                                                                           Bank
John D. Koch (2)                       1995(C)                45           Executive Vice President of Charter One, Executive
                                                                           Vice President/Chief Lending and Credit Officer of
                                                                           Charter One Bank
Philip J. Meathe                       1976(C)(1)             70           Retired Chairman of the Board and Chief Executive
                                                                           Officer of Smith, Hinchman & Grylls Associates,
                                                                           Inc. (firm composed of architects, engineers and
                                                                           planners)
Michael P. Morley                      1995(R)(3)             54           Senior Vice President and Director of Human
                                                                           Resources of Eastman Kodak Company of
                                                                           Rochester, New York
Richard W. Neu                         1992(C)(1)             41           Executive Vice President and Chief Financial
                                                                           Officer of Charter One and Executive Vice
                                                                           President/Chief Financial Officer of Charter One
                                                                           Bank since October 1995; Treasurer of FirstFed
                                                                           prior to the FirstFed Merger
Henry R. Nolte, Jr.                    1983(C)(1)             72           Of Counsel to Miller, Canfield, Paddock and Stone,
                                                                           Attorneys at Law, and was senior partner from 1989
                                                                           to 1993; retired as Vice President/General Counsel
                                                                           of Ford Motor Company in 1989
Ronald F. Poe                          1988(R)(3)             58           Chairman and Chief Executive Officer of Dorman
                                                                           & Wilson, Inc., a real estate investment banking
                                                                           firm; Director of the Federal Home Loan Mortgage 
                                                                           Corporation
Victor A. Ptak                         1989(C)                64           General partner and manager of J.C. Bradford & Co.
                                                                           (investment banking firm)

</TABLE>

                                       47


<PAGE>   60

<TABLE>
<CAPTION>

                                   YEAR BECAME A
                                  DIRECTOR OF CHARTER                                     PRINCIPAL OCCUPATION
        NAME                       ONE(C) OR RCSB(R)         AGE                          DURING PAST FIVE YEARS
- ----------------------            -------------------        ---           -----------------------------------------------------
<S>                                    <C>                    <C>          <C>                                                   
Jerome L. Schostak                     1985(C)(1)             63           Chairman of the Board of Schostak Brothers &
                                                                           Company, Inc. (full service real estate company),
                                                                           and served as President until 1994
Mark Shaevsky                          1985(C)(1)             61           Partner in Honigman Miller Schwartz and Cohn,
                                                                           Attorneys at Law
Leonard S. Simon                       1984(R)(3)             60           Chairman of the Board and Chief Executive Officer
                                                                           of RCSB and Rochester Bank, President of RCSB
                                                                           and Rochester Bank since September 1993
John P. Tierney                        1996(R)(3)             65           Retired Chairman and Chief Executive Officer of
                                                                           Chrysler Financial Corporation; Director of
                                                                           ContiFinancial Corporation
Eresteen R. Williams                   1979(C)(1)             70           Retired Medical Office Manager for D.G. Williams,
                                                                           Jr., M.D., P.C.
<FN>
- ----------
(1) These directors were previously directors of FirstFed who became directors
    in connection with Charter One, acquisition of FirstFed in October 1995.
    With respect to such directors, includes service as a member of the Board of
    Directors of FirstFed's subsidiary, First Federal of Michigan, prior to the
    formation of FirstFed. 
(2) Messrs. Charles John Koch and John D. Koch are brothers.
(3) Includes service as a member of the Board of Directors of Rochester Bank
    prior to the formation of RCSB.
</TABLE>

       Charter One has agreed to take all necessary corporate action to
effectuate the foregoing which includes the Amendment. Any amendments to the
charter of Charter One Bank are subject to the prior approval of the OTS.

OFFICERS AFTER THE MERGER

       Upon consummation of the Merger, the executive officers of Charter One
and Charter One Bank will be as follows: Charles John Koch - Chairman of the
Board, President and Chief Executive Officer of Charter One and Charter One
Bank; Richard W. Neu - Executive Vice President and Chief Financial Officer of
Charter One and Executive Vice President/Chief Financial Officer of Charter One
Bank; John D. Koch - Executive Vice President of Charter One and Executive Vice
President/Chief Lending and Credit Officer of Charter One Bank; Mark D. Grossi -
Executive Vice President of Charter One and Executive Vice President/Retail
Banking of Charter One Bank; Leonard S. Simon - Vice Chairman of the Charter One
Board; Edward J. Pettinella - Executive Vice President of Business Development
of Charter One and Charter One Bank; and Robert J. Vana - Chief Corporate
Counsel and Secretary of Charter One and Charter One Bank. All of the foregoing
officers, except for Messrs. Simon and Pettinella, currently serve in such
capacities with Charter One and/or Charter One Bank. Mr. Simon currently serves
as Chairman of the Board, President and Chief Executive Officer of RCSB and
Rochester Bank. Mr. Pettinella currently serves as an Executive Vice President
of RCSB and Rochester Bank.

CONSOLIDATION OF OPERATIONS

       Upon consummation of the Merger, the combined company will be
headquartered in Cleveland. The combined institution (including Haverfield) will
have 218 full service offices located in Ohio, Michigan and New York, with
approximately $10 billion in total deposits. After consummation of the Merger
and the Haverfield Merger, Charter One will remain a well capitalized
institution under current regulatory requirements.

POST-MERGER DIVIDEND POLICY

       Charter One is a legal entity, separate and distinct from Charter One
Bank and its subsidiaries. As a holding company with no significant operations
of its own, Charter One's principal sources of funds are its net earnings and
any dividends paid to it by Charter One Bank, which are subject to certain
federal regulatory limitations. The Charter One

                                       48


<PAGE>   61



Board after the consummation of the Merger will consider the payment and level
of dividends on Charter One Common Stock as it deems appropriate to do so,
taking into account federal regulatory restrictions, Charter One's level of net
income and financial condition, its future prospects, economic conditions,
industry practices and other factors. Any dividend declared by the Charter One
Board will be consistent with its analysis of the factors detailed above, and
there can be no assurance as to any future dividends. See also "SUMMARY --
Comparative Stock Prices and Dividend Information."

                             CERTAIN RELATED MATTERS

STOCK OPTION AGREEMENT

       The information in this Joint Proxy Statement/Prospectus concerning the
terms of the Stock Option Agreement is qualified in its entirety by reference to
the full text of the Stock Option Agreement which is attached hereto at Annex D
and incorporated herein by reference.

       As an inducement and a condition to entering into the Merger Agreement,
Charter One received an option (the "Option") to purchase up to 2,880,944 shares
(approximately 19.9%) of RCSB Common Stock at an exercise price of $37.50 per
share, subject to the terms and conditions set forth in the Stock Option
Agreement. The Stock Option Agreement provides for anti-dilution protection. The
Option may only be exercised upon the occurrence of certain "Purchase Events"
which are described below (none of which has occurred as of the date hereof).

       The Option is exercisable (after receipt of any required regulatory
approvals) by Charter One only upon the occurrence of one of the following
"Purchase Events": (i) RCSB or any of its subsidiaries, without having received
prior written consent from Charter One, shall have entered into, authorized,
recommended, proposed or publicly announced its intention to enter into,
authorize, recommend, or propose, an agreement, arrangement or understanding
with any person (other than Charter One or a Charter One subsidiary) to (A)
effect a merger or consolidation or similar transaction involving RCSB or any
RCSB subsidiary (other than internal mergers, reorganizing actions,
consolidations or dissolutions involving only existing RCSB subsidiaries), (B)
purchase, lease or otherwise acquire 35 percent or more of the consolidated
assets of RCSB, or (C) purchase or otherwise acquire (including by way of
merger, consolidation, share exchange or similar transaction) Beneficial
Ownership (as defined in the Stock Option Agreement) of securities representing
20 percent or more of the voting power of RCSB or any RCSB subsidiary; (ii) any
person or group (other than Charter One or a Charter One subsidiary, or RCSB or
any RCSB subsidiary acting in a fiduciary capacity) shall have acquired
Beneficial Ownership or the right to acquire Beneficial Ownership of 20 percent
or more of the voting power of RCSB; or (iii) the RCSB Board shall have
withdrawn or modified in a manner adverse to Charter One the recommendation of
the RCSB Board with respect to the Merger Agreement and the Merger, in each case
after an Extension Event (as defined below); or (iv) the holders of RCSB Common
Stock shall not have adopted the Merger Agreement at the RCSB Special Meeting,
or the RCSB Special Meeting shall not have been held or shall have been canceled
prior to termination of the Merger Agreement in accordance with its terms, in
each case after an Extension Event.

       An "Extension Event" shall mean any of the following events: (i) a
"Purchase Event" of the type specified in clauses (i) and (ii) of the preceding
paragraph; (ii) any person or group (other than Charter One or a Charter One
subsidiary) 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
shares of RCSB Common Stock such that, upon consummation of such offer, such
person or group would have Beneficial Ownership or the right to acquire
Beneficial Ownership of 20 percent or more of the voting power of RCSB; (iii)
any person or group (other than Charter One or a Charter One subsidiary) shall
have publicly announced its willingness, or shall have publicly announced a
proposal, or publicly disclosed an intention to make a proposal (A) to make an
offer described in clause (ii) of this paragraph, or (B) to engage in a
transaction described in clause (i) of this paragraph; or (iv) any person, by
public proxy, consent solicitation or other process made to the RCSB
stockholders, shall seek proxies in opposition to the Merger Agreement and the
Merger.

       The Option expires upon the earliest to occur of (i) the Effective Time
of the Merger, (ii) the termination of the Merger Agreement (other than a
termination by Charter One pursuant to a material breach of representations,
warranties or covenants by RCSB thereof, a "Default Termination"), and (iii) 18
months following the termination of

                                       49


<PAGE>   62



the Merger Agreement by Charter One if such termination is a result of a Default
Termination; provided that if such termination pursuant to subpart (ii) above
follows an Extension Event, the Option shall not terminate until the date that
is 12 months following such termination. However, if the Option can not be
exercised on the date that it would otherwise terminate because of any
injunction, order or similar restraint issued by a court of competent
jurisdiction, the Option shall expire on the 30th business day after the
judicial impediment is lifted or removed. Any exercise of the Option is subject
to compliance with applicable law, including the HOLA.

       The Stock Option Agreement further provides that, to the extent that the
Option has not terminated pursuant to its terms and subject to any required
regulatory approval, from and after the date of a Purchase Event until 13 months
immediately thereafter, RCSB will be obligated, at the request of Charter One,
to repurchase the unexercised portion of the Option and any securities of RCSB
purchased by Charter One pursuant to the Option, in each case at a specified
price.

       Upon the occurrence of certain events, RCSB has granted certain
registration rights with respect to RCSB's securities acquired by any holder or
beneficial owner (a "Holder") of RCSB Common Stock upon exercise of the Option.
These rights require that RCSB file a registration statement under the
Securities Act if requested by a Holder. Any such registration statement, and
any sale covered thereby, will be at RCSB's expense except for underwriting
commissions and the fees and disbursements of such Holder's counsel attributable
to the registration of such securities.

       The Option, which Charter One required that RCSB grant as a condition to
Charter One's entering into the Merger Agreement, may increase the likelihood of
consummation of the Merger by discouraging competing offers for RCSB. Certain
aspects of the Stock Option Agreement may have the effect of discouraging
persons who may now, or prior to the Effective Time, be interested in acquiring
all of or a significant interest in RCSB from considering or proposing such an
acquisition, even if such person were prepared to offer to pay consideration to
stockholders of RCSB which had a higher current market price than the Merger
Consideration to be received for each share of RCSB Common Stock pursuant to the
Merger Agreement. The acquisition of RCSB or an interest in RCSB, or an
agreement to do either, could cause the Option to become exercisable. The
existence of the Option could significantly increase the cost to a potential
acquiror of acquiring RCSB compared to its cost had the Stock Option Agreement
not been entered into. Such increased costs might discourage a potential
acquiror from considering or proposing an acquisition or might result in a
potential acquiror proposing to pay a lower price to acquire RCSB than it might
otherwise have proposed to pay. Provisions in the Stock Option Agreement may
prevent an acquiror from accounting for its acquisition of RCSB using the
pooling of interests accounting method. This could discourage or preclude an
acquisition of RCSB.

       The foregoing is a summary of the material provisions of the Stock Option
Agreement, a copy of which is attached at Annex D to this Joint Proxy
Statement/Prospectus. This summary is qualified in its entirety by reference to
the Stock Option Agreement which is incorporated herein by this reference.

THE BANK MERGER

       The Bank Merger, whereby Rochester Bank will be merged with and into
Charter One Bank, is anticipated to occur simultaneously with the Merger. The
respective obligations of Charter One Bank and Rochester Bank to consummate the
Bank Merger are conditioned upon the satisfaction or waiver by Charter One and
RCSB of all conditions to consummation of the Merger set forth in the Merger
Agreement and approval by the OTS and the New York Superintendent.

                                       50


<PAGE>   63



                UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS

       The following Unaudited Pro Forma Combined Statement of Financial
Condition as of March 31, 1997 combines the historical consolidated statements
of financial condition of Charter One and its subsidiaries, RCSB and its
subsidiaries and Haverfield and its subsidiaries as if Charter One had
consummated the Merger and the Haverfield Merger effective on March 31, 1997,
after giving effect to certain pro forma adjustments described in the
accompanying notes. The following Unaudited Pro Forma Combined Statements of
Income for the three-month periods ended March 31, 1997 and 1996 and for each of
the years in the three-year period ended December 31, 1996 present the combined
historical results of operations of Charter One and its subsidiaries, RCSB and
its subsidiaries and Haverfield and its subsidiaries as if Charter One had
consummated the Merger effective January 1, 1994. Both Charter One's and
Haverfield's fiscal years end December 31. Since RCSB has a fiscal year end as
of November 30, all financial information for RCSB is stated as of the
respective quarter ended May 31, 1997 and 1996 or year ended November 30, 1996,
1995 and 1994. Pro forma per share amounts are based on the Haverfield Exchange
Ratio (based on the market price of Charter One Common Stock as of March 31,
1997 of $44.00 per share) of .6136 shares of Charter One Common Stock for each
share of Haverfield Common Stock and an Exchange Ratio of .91 shares of Charter
One Common Stock for each share of RCSB Common Stock. See "RECENT DEVELOPMENTS"
and "THE MERGER - Merger Consideration." The Merger and the Haverfield Merger
are expected to close in the late third quarter or early fourth quarter of 1997.

       The Unaudited Pro Forma Combined Financial Statements and related
footnotes account for the Merger using the pooling of interests method of
accounting and the Haverfield Merger as a purchase for accounting treatment.
Under the pooling of interest method of accounting, the recorded assets,
liabilities, stockholders' equity, income and expenses of Charter One and RCSB
are combined and recorded at their historical cost-based amounts, except as
noted below and in the footnotes. By accounting for the Haverfield Merger as a
purchase, upon consummation of the Haverfield Merger, the assets and liabilities
of Haverfield will be recorded on the books and records of Charter One at their
respective fair values at the time of consummation of the Haverfield Merger.

       The Unaudited Pro Forma Combined Financial Statements are intended for
informational purposes and are not necessarily indicative of the future
consolidated financial position or future results of operations of the combined
entity or the consolidated financial position or results of operations of the
combined entity that would have been achieved had the Merger and the Haverfield
Merger been consummated as of the date or at the beginning of the periods
presented. The Unaudited Pro Forma Combined Statements of Income do not reflect
the cost to effect the Merger, the Haverfield Merger and to combine operations,
or any expected cost savings therefrom. These Unaudited Pro Forma Combined
Financial Statements should be read in conjunction with, and are qualified in
their entirety by, the separate historical consolidated financial statements and
notes thereto of Charter One and RCSB, which are incorporated by reference
herein. See "INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE." See also
"MANAGEMENT AND OPERATIONS AFTER THE MERGER -- Consolidation of Operations."

                                       51


<PAGE>   64



          UNAUDITED PRO FORMA COMBINED STATEMENT OF FINANCIAL CONDITION

<TABLE>
<CAPTION>

                                                     AT MARCH 31, 1997
                                      --------------------------------------------

                                      CHARTER ONE       RCSB AS         PRO FORMA               
                                      AS REPORTED       REPORTED        ADJUSTMENTS             
                                      -----------       --------        -----------             
                                                                           

<S>                                  <C>               <C>              <C>      <C>
ASSETS:
Cash and cash equivalents ......     $    168,357      $    75,916      $(52,500)(1)
    Mortgage-backed securities:
    Available for sale .........        1,069,830           15,808          --   
    Held to maturity ...........        3,495,098        1,544,536          --   
Investment securities:
    Available for sale .........          281,448            6,131          --   
    Held to maturity ...........             --                 76          --   
Loans and leases, net ..........        8,472,041        2,196,707          --   
Federal Home Loan Bank
   stock .......................          217,917           41,568          --   
Premises and equipment .........          115,167           39,528       (26,500)(1)
Accrued interest receivable ....           76,962           22,289          --   
Equipment on operating
   leases ......................           19,979             --            --   
Real estate owned ..............            6,330            6,111          --   
Loan servicing assets ..........            2,605           93,206          --   
Goodwill .......................           63,330            7,545          --   
Other assets ...................           42,524           54,946        24,000 (2)
                                     ------------      -----------      --------
  Total assets .................     $ 14,031,588      $ 4,104,367      $(55,000)
                                     ============      ===========      ========

LIABILITIES AND STOCKHOLDERS'
EQUITY: LIABILITIES:
  Deposits .....................     $  7,839,479      $ 2,342,879      $   --   
  Federal Home Loan Bank
   advances ....................        3,081,274          112,150          --   
  Reverse repurchase
     agreements ................        1,735,966        1,113,468          --   
  Other borrowings .............          211,616              479          --   
  Advance payments by
    borrowers for taxes and
    insurance ..................           40,303           92,061          --   
  Accrued interest payable .....           40,777            5,087          --   
  Accrued expenses and other
    liabilities ................          136,406          125,666          --   
                                     ------------      -----------      --------
       Total liabilities .......       13,085,821        3,791,790          --   
                                     ------------      -----------      --------
STOCKHOLDERS' EQUITY:
  Common stock and paid-in
    capital ....................          322,466          176,562       (28,912)(3)
                                             --               --            --   
  Retained earnings ............          666,703          171,485       (55,000)(4)
  Loans to employee stock
     plan ......................             --             (2,805)         --   
  Treasury stock(19) ...........          (44,560)         (28,912)       28,912 (3)
  Net unrealized gain (loss)
    on securities ..............            1,158           (3,753)         --   
                                     ------------      -----------      --------
      Total stockholders' equity          945,767          312,577       (55,000)
                                     ------------      -----------      --------
      Total liabilities and
          stockholders' equity .     $ 14,031,588      $ 4,104,367      $(55,000)
                                     ============      ===========      ========


<CAPTION>

                                      COMBINED                                                PRO FORMA
                                      PRO FORMA                                                  FOR
                                        FOR                                                   CHARTER ONE/
                                     CHARTER ONE/       HAVERFIELD       PRO FORMA                RCSB/    
                                         RCSB           AS REPORTED      ADJUSTMENTS          HAVERFIELD     
                                        ------          -----------      ------------         ----------     
                                   (DOLLARS IN THOUSANDS)                                      

ASSETS:
<S>                                  <C>               <C>               <C>                <C>         
Cash and cash equivalents ......     $    191,773      $   5,302              --            $    197,075
    Mortgage-backed securities:
    Available for sale .........        1,085,638          1,965              --               1,087,603
    Held to maturity ...........        5,039,634           --                --               5,039,634
Investment securities:
    Available for sale .........          287,579         28,863              --                 316,442
    Held to maturity ...........               76           --                --                      76
Loans and leases, net ..........       10,668,748        294,143          $    273 (5)        10,963,164
Federal Home Loan Bank
   stock .......................          259,485          2,849              --                 262,334
Premises and equipment .........          128,195          4,324              --                 132,519
Accrued interest receivable ....           99,251          2,548              --                 101,799
Equipment on operating
   leases ......................           19,979           --                --                  19,979
Real estate owned ..............           12,441           --                --                  12,441
Loan servicing assets ..........           95,811           --               1,627 (6)            97,438
Goodwill .......................           70,875           --              24,372 (7)            95,247
Other assets ...................          121,470          1,670              --                 123,140
                                     ------------      ---------          --------          ------------
  Total assets .................     $ 18,080,955      $ 341,664          $ 26,272          $ 18,448,891
                                     ============      =========          ========          ============

LIABILITIES AND STOCKHOLDERS'
EQUITY: LIABILITIES:
  Deposits .....................     $ 10,182,358      $ 273,226          $  2,393 (8)      $ 10,457,977
  Federal Home Loan Bank
   advances ....................        3,193,424         32,000             1,086 (9)         3,226,510
  Reverse repurchase
     agreements ................        2,849,434           --                --               2,849,434
  Other borrowings .............          212,095           --                --                 212,095
  Advance payments by
    borrowers for taxes and
    insurance ..................          132,364          3,531              --                 135,895
  Accrued interest payable .....           45,864          1,995              --                  47,859
  Accrued expenses and other
    liabilities ................          262,072          2,237              --                 264,309
                                     ------------      ---------          --------          ------------
       Total liabilities .......       16,877,611        312,989             3,479            17,194,079
                                     ------------      ---------          --------          ------------
STOCKHOLDERS' EQUITY:
  Common stock and paid-in
    capital ....................          470,116         16,529           (16,529)(11)          521,584
                                             --             --              51,468 (10)             --
  Retained earnings ............          783,188         12,692           (12,692)(11)          783,188
  Loans to employee stock
     plan ......................           (2,805)          --                --                  (2,805)
  Treasury stock(19) ...........          (44,560)          (122)              122 (11)          (44,560)
  Net unrealized gain (loss)
    on securities ..............           (2,595)          (424)              424 (11)           (2,595)
                                     ------------      ---------          --------          ------------
      Total stockholders' equity        1,203,344         28,675            22,793             1,254,812
                                     ------------      ---------          --------          ------------
      Total liabilities and
          stockholders' equity .     $ 18,080,955      $ 341,664          $ 26,272          $ 18,448,891
                                     ============      =========          ========          ============
</TABLE>



        See "Notes to Unaudited Pro Forma Combined Financial Statements."

                                       52


<PAGE>   65

<TABLE>
<CAPTION>


                                                              UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME

                                                          FOR THE THREE MONTHS ENDED MARCH 31,  1997
                                        --------------------------------------------------------------------------------------------
                                                                                                                      COMBINED
                                                                        COMBINED                                      PRO FORMA
                                                                        PRO FORMA                                     FOR CHARTER
                                         CHARTER ONE        RCSB        FOR CHARTER    HAVERFIELD      PRO FORMA      ONE/RCSB/
                                         AS REPORTED    AS REPORTED     ONE/RCSB       AS REPORTED    ADJUSTMENTS(17) HAVERFIELD
                                         -----------    -----------     --------       -----------    --------------------------
                                                            (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)

<S>                                     <C>             <C>             <C>             <C>            <C>            <C>        
Interest income ...................     $   255,793     $    76,158     $   331,951     $    6,803     $  (6)(12)     $   338,748
Interest expense ..................         158,267          42,786         201,053          3,725      (225)(13)         204,553
                                        -----------     -----------     -----------     ----------     -----          -----------
  Net interest income .............          97,526          33,372         130,898          3,078       219              134,195
Provision for loan and lease losses             220           4,092           4,312             96      --                  4,408
                                        -----------     -----------     -----------     ----------     -----          -----------
Net interest income after provision
 for loan and lease losses ........          97,306          29,280         126,586          2,982       219              129,787
Net gain on sales .................              87               0              87           --        --                     87
Other income ......................          15,094          15,790          30,884            566       (36)(14)          31,414
Other expenses ....................          46,697          32,502          79,199          2,318       406 (15)          81,923
                                        -----------     -----------     -----------     ----------     -----          -----------
Income before income taxes ........          65,790          12,568          78,358          1,230      (223)              79,365
Provision for income taxes ........          21,704           4,332          26,036            418      --                 26,454
                                        -----------     -----------     -----------     ----------     -----          -----------
Net income ........................     $    44,086     $     8,236     $    52,322     $      812     $(223)         $    52,911
                                        ===========     ===========     ===========     ==========     =====          ===========
Earnings per common and
 common  equivalent share(16):
    Primary .......................     $       .93     $       .55     $       .85     $      .43                    $       .85
                                        ===========     ===========     ===========     ==========                    ===========
    Fully diluted .................     $       .93     $       .55     $       .85     $      .43                    $       .85
                                        ===========     ===========     ===========     ==========                    ===========
Weighted average common and
    common equivalent shares(16):

    Primary .......................      47,625,723      14,941,966      61,222,912      1,906,349                     62,392,648
                                        ===========     ===========     ===========     ==========                    ===========
    Fully diluted .................      47,627,721      14,998,306      61,276,179      1,906,349                     62,445,915
                                        ===========     ===========     ===========     ==========                    ===========
</TABLE>



        See "Notes to Unaudited Pro Forma Combined Financial Statements."

                                       53


<PAGE>   66


<TABLE>
<CAPTION>


                                                              FOR THE THREE MONTHS ENDED MARCH 31,  1996
                                           ------------------------------------------------------------------------------------
                                                                                                                      COMBINED
                                                                           COMBINED                                   PRO FORMA
                                                                          PRO FORMA                                  FOR CHARTER
                                           CHARTER ONE      RCSB         FOR CHARTER   HAVERFIELD    PRO FORMA       ONE/RCSB/
                                           AS REPORTED    AS REPORTED      ONE/RCSB    AS REPORTED   ADJUSTMENTS(17) HAVERFIELD
                                           -----------    -----------      --------    -----------   --------------- ----------
                                                               (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)

<S>                                        <C>            <C>            <C>            <C>           <C>           <C>        
Interest income .......................    $   243,048    $    74,513    $   317,561    $    6,869    $  (8)(12)    $   324,422
Interest expense ......................        151,046         41,504        192,550         3,804     (508)(13)        195,846
                                           -----------    -----------    -----------    ----------    -----         -----------
  Net interest income .................         92,002         33,009        125,011         3,065      500             128,576
Provision for loan and lease losses ...          1,000          3,478          4,478            34     --                 4,512
                                           -----------    -----------    -----------    ----------    -----         -----------
Net interest income after provision for
    loan and lease losses .............         91,002         29,531        120,533         3,031      500             124,064
Net gain on sales .....................            577            995          1,572             0     --                 1,572
Other income ..........................         11,262         15,987         27,249           521      (64)(14)         27,706
Other expenses ........................         44,583         31,923         76,506         2,585      406 (15)         79,497
                                           -----------    -----------    -----------    ----------    -----         -----------
Income before income taxes ............         58,258         14,590         72,848           967       30              73,845
Provision for income taxes ............         19,808          5,106         24,914           329     --                25,243
                                           -----------    -----------    -----------    ----------    -----         -----------
Net income ............................    $    38,450    $     9,484    $    47,934    $      638    $  30         $    48,602
                                           ===========    ===========    ===========    ==========    =====         ===========
Earnings per common and common
  equivalent share(16):

    Primary ...........................    $       .80    $       .63    $       .78    $      .34                  $       .77
                                           ===========    ===========    ===========    ==========                  ===========
    Fully diluted .....................    $       .79    $       .54    $       .74    $      .34                  $       .74
                                           ===========    ===========    ===========    ==========                  ===========
Weighted average common and common
    equivalent shares(16):

    Primary ...........................     48,270,184     12,921,063     60,028,351     1,886,921                   61,186,166
                                           ===========    ===========    ===========    ==========                  ===========
    Fully diluted .....................     48,381,886     17,590,969     64,389,668     1,886,921                   65,559,404
                                           ===========    ===========    ===========    ==========                  ===========
</TABLE>



        See "Notes to Unaudited Pro Forma Combined Financial Statements."

                                       54


<PAGE>   67

<TABLE>
<CAPTION>



                                                                    FOR THE YEAR ENDED DECEMBER 31, 1996
                                           --------------------------------------------------------------------------------------
                                                                                                                      COMBINED
                                                                         COMBINED                                     PRO FORMA   
                                                                         PRO FORMA                                    FOR CHARTER
                                           CHARTER ONE       RCSB        FOR CHARTER   HAVERFIELD      PRO FORMA      ONE/RCSB    
                                           AS REPORTED    AS REPORTED    ONE/RCSB/     AS REPORTED    ADJUSTMENTS(17) HAVERFIELD
                                           -----------    -----------    ---------     -----------    --------------- ----------
                                                            (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                        <C>            <C>            <C>            <C>           <C>             <C>        
Interest income .......................    $ 1,004,478    $   293,618    $ 1,298,096    $   27,292    $   (25)(12)    $ 1,325,363
Interest expense ......................        621,086        164,237        785,323        14,742     (1,677)(13)        798,388
                                           -----------    -----------    -----------    ----------    -------         -----------
  Net interest income .................        383,392        129,381        512,773        12,550      1,652             526,975
Provision for loan and lease losses ...          4,001         13,548         17,549           309       --                17,858
                                           -----------    -----------    -----------    ----------    -------         -----------
Net interest income after provision for
    loan and lease losses .............        379,391        115,833        495,224        12,241      1,652             509,117
Net gain on sales .....................          1,893          1,900          3,793          --         --                 3,793
Other income ..........................         55,245         63,259        118,504         2,005       (149)(14)        120,360
Federal deposit insurance special
  assessment ..........................         56,258           --           56,258         1,962       --                58,220
Other administrative expenses .........        187,766        123,442        311,208        10,000      1,625 (15)        322,833
                                           -----------    -----------    -----------    ----------    -------         -----------
Income before income taxes ............        192,505         57,550        250,055         2,284       (122)            252,217
Provision for income taxes ............         64,783         17,845         82,628           777       --                83,405
                                           -----------    -----------    -----------    ----------    -------         -----------
Net income ............................    $   127,722    $    39,705    $   167,427    $    1,507    $  (122)        $   168,812
                                           ===========    ===========    ===========    ==========    =======         ===========
Earnings per common and common
  equivalent share(16):

    Primary ...........................    $      2.67    $      2.67    $      2.72    $      .79                    $      2.69
                                           ===========    ===========    ===========    ==========                    ===========
    Fully diluted .....................    $      2.64    $      2.36    $      2.63    $      .79                    $      2.61
                                           ===========    ===========    ===========    ==========                    ===========
Weighted average common and
    common equivalent shares(16):

    Primary ...........................     47,916,192     13,920,621     60,583,957     1,901,094                     61,750,468
                                           ===========    ===========    ===========    ==========                    ===========
    Fully diluted .....................     48,297,472     16,811,699     63,596,118     1,901,094                     64,762,629
                                           ===========    ===========    ===========    ==========                    ===========
</TABLE>



        See "Notes to Unaudited Pro Forma Combined Financial Statements."

                                       55


<PAGE>   68



<TABLE>
<CAPTION>

                                                   FOR THE YEAR ENDED DECEMBER 31, 1995
                                                ---------------------------------------------
                                                                                 COMBINED      
                                                                                 PRO FORMA     
                                                 CHARTER ONE         RCSB        FOR CHARTER   
                                                 AS REPORTED     AS REPORTED     ONE/RCSB     
                                                 -----------     -----------     ---------     
                                                (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)

<S>                                             <C>              <C>            <C>         
Interest income ............................    $  1,087,410     $   272,773    $  1,360,183
Interest expense ...........................         769,594         149,210         918,804
                                                ------------     -----------    ------------
  Net interest income ......................         317,816         123,563         441,379
Provision for loan losses and lease ........           1,032           7,632           8,664
                                                ------------     -----------    ------------
Net interest income after provision for loan
    and lease losses .......................         316,784         115,931         432,715
Net (loss) gain on sales ...................         (16,096)            354         (15,742)
Net loss on termination of interest rate
  exchange agreements ......................         (76,207)           --           (76,207)
Other income ...............................          44,467          48,110          92,577
Merger expenses ............................          37,528            --            37,528
Other expenses .............................         178,215         114,058         292,273
                                                ------------     -----------    ------------
Income before income taxes .................          53,205          50,337         103,542
Provision for income taxes .................          19,173          12,584          31,757
                                                ------------     -----------    ------------
Net income .................................    $     34,032     $    37,753    $     71,785
                                                ============     ===========    ============
Earnings per common and common
  equivalent share (16):

    Primary ................................    $        .71     $      2.32    $       1.09
                                                ============     ===========    ============
    Fully diluted ..........................    $        .70     $      2.02    $       1.09 (18)
                                                ============     ===========    ============ 
Weighted average common and common
    equivalent shares (16):

    Primary ................................      48,151,822      14,006,693      60,897,913
                                                ============     ===========    ============
    Fully diluted ..........................      48,439,098      18,678,056      65,436,129
                                                ============     ===========    ============
</TABLE>


        See "Notes to Unaudited Pro Forma Combined Financial Statements."

                                       56


<PAGE>   69

<TABLE>
<CAPTION>



                                               FOR THE YEAR ENDED DECEMBER 31, 1994
                                           --------------------------------------------
                                                                            COMBINED      
                                                                            PRO FORMA     
                                            CHARTER ONE         RCSB        FOR CHARTER   
                                            AS REPORTED     AS REPORTED     ONE/RCSB     
                                            -----------     -----------     ---------     
                                           (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)

<S>                                        <C>             <C>            <C>         
Interest income ........................   $  1,006,180    $    258,822   $  1,265,002
Interest expense .......................        694,207         131,325        825,532
                                           ------------    ------------   ------------
  Net interest income ..................        311,973         127,497        439,470
Provision for loan losses ..............          2,948          16,096         19,044
                                           ------------    ------------   ------------
Net interest income after provision for
    loan losses ........................        309,025         111,401        420,426
Net gain on sales ......................          9,578          27,124         36,702
Net loss on termination of interest rate
 exchange agreements ...................       (155,364)           --         (155,364)
Other income ...........................         35,397          57,621         93,018
Other expenses .........................        175,961         140,397        316,358
                                           ------------    ------------   ------------
Income before income taxes and
  extraordinary item ...................         22,675          55,749         78,424
Federal income taxes ...................          7,056          11,429         18,485
                                           ------------    ------------   ------------
Income before extraordinary item .......   $     15,619    $     44,320   $     59,939
                                           ============    ============   ============
Per share income before extraordinary
  item (16):

    Primary ............................   $        .32    $       2.81   $        .90
                                           ============    ============   ============
    Fully diluted ......................   $        .32    $       2.39   $        .90 (18)
                                           ============    ============   ============
Weighted average common and
    common equivalent shares (16):

    Primary ............................     48,237,686      13,893,162     60,880,463
                                           ============    ============   ============
    Fully diluted ......................     48,254,441      18,565,037     65,148,625
                                           ============    ============   ============
</TABLE>


        See "Notes to Unaudited Pro Forma Combined Financial Statements."

                                       57


<PAGE>   70



NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS

       Pursuant to the Merger Agreement and consistent with generally accepted
accounting principles, Charter One and RCSB expect that costs incurred to effect
the Merger and the Haverfield Merger, which would include transaction costs of
the Merger, the Haverfield Merger and costs to combine operations, will be
deducted in determining net income in the period in which they are incurred. The
pro forma financial statements do not give effect to any cost savings which may
be realized in connection with the consolidation of the respective operations of
Charter One, RCSB and Haverfield.

(1)  Transaction costs of the Merger (primarily investment banker and other
     professional fees) and costs to combine operations are expected to be in
     the range of $73 million to $85 million pre-tax (the "Expected Range") or
     $50 million to $60 million after-tax. The Unaudited Pro Forma Combined
     Statements of Income do not reflect these charges. The Unaudited Pro Forma
     Combined Statement of Financial Condition reflects these charges at the
     mid-point of the Expected Range ($79 million). It is anticipated that these
     charges will be incurred and recognized by Charter One and RCSB and
     substantially paid by the end of 1997. The transaction costs relating to
     the Haverfield Merger are not anticipated to be material. The following
     table provides details of the estimated charges by type of cost:

<TABLE>
<CAPTION>
                                                                     EXPECTED RANGE OF       EXPECTED RANGE OF
           TYPE OF COST                                                PRE-TAX COST           AFTER-TAX COST
- ----------------------------------------------------------------     ------------------     ------------------

<S>                                                                  <C>                    <C>             
Transaction costs                                                    $7 to $9 million       $7 to $9 million

Costs to combine operations:
  Severance and other employee termination costs                     $31 to $37 million     $20 to $24 million
  Duplicative systems, facilities costs, and related intangibles     $25 to $28 million     $16 to $18 million
  Other costs incidental to the Merger                               $10 to $11 million     $7 to $9 million

    Total transaction costs and costs to combine operations          $73 to $85 million     $50 to $60 million

</TABLE>


(2)  Represents the expected income tax benefit associated with the pro forma
     adjustments, assuming a federal income tax rate of 35%.

(3)  Adjustment to eliminate the RCSB treasury stock accounts.

(4)  Represents the expected after-tax effect of the pro forma adjustments, as
     described in notes (1) and (2) above.

(5)  Adjustment of loan portfolio to estimated fair value.

(6)  To record estimated fair value of loan servicing portfolio.

(7)  To record cost in excess of fair value of assets acquired.

(8)  Adjustment of savings deposit accounts to fair value.

(9)  Adjustment of FHLB advances to fair value.

(10) To reflect the issuance of 1,169,736 shares of Charter One Financial common
     stock at $44.00 per share.

(11) Elimination of Haverfield equity accounts.

(12) Pro forma amortization of purchase accounting premiums of loans.

(13) Pro forma amortization of the purchase accounting premiums on
     interest-bearing liabilities.

(14) Pro forma amortization of the purchase accounting premium relating to loan
     servicing assets.

(15) Pro forma amortization of goodwill.

                                       58


<PAGE>   71




(16) The pro forma combined per share data has been computed based on the
     combined historical income before extraordinary items and on the combined
     historical weighted average common and common equivalent shares outstanding
     assuming the issuance of .6136 shares of Charter One Common Stock for each
     share of Haverfield Common Stock based on the Haverfield Exchange Ratio
     (based on the market price of Charter One Stock as of March 31, 1997) and
     .91 shares of Charter One Common Stock for each share of RCSB Common Stock.
     See "RECENT DEVELOPMENTS" and "THE MERGER -- Merger Consideration."

(17) The estimated pro forma effect on future periods' results of operations of
     the amortization of purchase accounting valuation adjustments in connection
     with Charter One Financial's acquisition of Haverfield on the basis of
     assumptions explained herein would be as follows:

<TABLE>
<CAPTION>

                                                                ACCRETION OF     ACCRETION OF
                                              ACCRETION OF       PREMIUM ON       PREMIUM ON        AMORTIZATION OF   NET EFFECT ON
                                               PREMIUM ON      LOAN SERVICING   INTEREST-BEARING       INTANGIBLE        RESULTS OF
          PERIOD                                 LOANS              ASSET         LIABILITIES       ASSETS ACQUIRED      OPERATIONS
- --------------------------------------        -----------      --------------   ----------------    ---------------   -------------
                                                                    (Dollars in Thousands)

<S>                                            <C>                <C>                <C>               <C>                <C>      
Pro forma Historical:
  Year ended December 31, 1996                 $    (25)          $   (149)          $  1,677          $ (1,625)          $   (122)
  Three months ended March 31, 1997                  (6)               (36)               225              (406)              (223)
                                               --------           --------           --------          --------           --------
    Total                                           (31)              (185)             1,902            (2,031)              (345)
                                               --------           --------           --------          --------           --------

Pro forma Projected:
  Nine months ended December 31, 1997               (15)               (89)               650            (1,219)              (673)
  Year ended December 31, 1998                      (19)              (113)               449            (1,625)            (1,308)
  Year ended December 31, 1999                      (17)              (101)               191            (1,625)            (1,552)
  Year ended December 31, 2000                      (15)               (89)               168            (1,625)            (1,561)
  Year ended December 31, 2001                      (14)               (83)                72            (1,625)            (1,650)
  Year ended December 31, 2002                      (13)               (77)                47            (1,625)            (1,668)
  Thereafter                                       (149)              (890)                 0           (12,997)           (14,036)
                                               --------           --------           --------          --------           --------
   Total                                           (242)            (1,442)             1,577           (22,341)           (22,448)
                                               --------           --------           --------          --------           --------
     Total                                     $   (273)          $ (1,627)          $  3,479          $(24,372)          $(22,793)
                                               ========           ========           ========          ========           ========
</TABLE>



     Premiums on acquired interest earning assets and interest-bearing
     liabilities are expected to be amortized using the level-yield method over
     the contractual lives adjusted for estimated prepayments. The core deposit
     intangible will be amortized over the estimated life of the related
     deposits. Goodwill will be amortized straight line over 15 years.

(18) Effect of conversion of preferred stock is antidilutive, therefore, amount
     represents primary earnings per share.

(19) On August 8, 1997 Charter One terminated its stock repurchase program.

                                       59


<PAGE>   72



                       UNAUDITED PRO FORMA PER SHARE DATA

       The following table presents selected per share data for Charter One,
RCSB and Haverfield on an historical and a pro forma basis as if Charter One had
consummated the Merger and the Haverfield Merger effective as of the dates or at
the beginning of each of the periods indicated. The Merger and the Haverfield
Merger are expected to close in the late third quarter or early fourth quarter
of 1997. The Merger is expected to be accounted for under the pooling of
interests method of accounting, the Haverfield Merger is expected to be
accounted for as a purchase for accounting purposes, and the unaudited pro forma
financial data is derived in accordance with such methods.

       The information shown below should be read in conjunction with the
historical consolidated financial statements of Charter One and RCSB and related
notes thereto, which are incorporated by reference herein, and the unaudited pro
forma financial data included herein. See "INCORPORATION OF CERTAIN DOCUMENTS BY
REFERENCE" and " UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS-- Notes to
Unaudited Pro Forma Combined Financial Statements" for a description of
assumptions and adjustments used in preparing the unaudited pro forma financial
data. Both Charter One's and Haverfield's fiscal years end December 31. Since
RCSB has a fiscal year end as of November 30, all financial information for RCSB
is stated as of the respective quarter ended May 31, 1997 and 1996 or year ended
November 30, 1996, 1995 and 1994. The pro forma per share data has been included
for comparative purposes only and does not purport to be indicative of the
results that actually would have been obtained if the Merger and the Haverfield
Merger had been effected at the beginning of the periods or on the dates
indicated, as applicable, or of those results that may be obtained in the
future.

<TABLE>
<CAPTION>

                                                                    
                                                                                                                         COMBINED
                                                                             COMBINED        PRO FORMA                   PRO FORMA 
                                                                             PRO FORMA         RCSB                     FOR CHARTER
                                             CHARTER ONE       RCSB         FOR CHARTER     EQUIVALENT    HAVERFIELD     ONE/RCSB/ 
                                             AS REPORTED    AS REPORTED      ONE/RCSB         SHARES     AS REPORTED    HAVERFIELD
                                             -----------    -----------      ---------     -----------   -----------  --------------
                                                            (DOLLARS IN THOUSANDS, EXCEPT PER SHARE DATA)

<S>                                          <C>             <C>             <C>              <C>         <C>          <C>
Book value per common share at(1):
  March  31, 1997 ......................         $20.41          $21.42          $21.11       $19.21         $15.04         $21.17
  December 31, 1996 ....................          19.85           21.12           20.62        18.76          14.87          20.69

Shares outstanding at:
 March 31, 1997 ........................     46,338,721      14,590,975      59,616,508         N/A       1,906,349     60,786,244
  December 31, 1996 ....................     46,442,723      15,331,282      60,394,190         N/A       1,906,349     61,563,925

Cash dividends declared per common share
for the period ended(2):
  March 31, 1997 .......................          $0.23           $0.15           $0.23        $0.21          $0.14          $0.23
  March 31, 1996 .......................           0.19            0.24(5)         0.19         0.17           0.135          0.19
  December 31, 1996 ....................           0.86            0.51            0.86         0.78           0.54           0.86
  December 31, 1995 ....................           0.71            0.42            0.71         0.65           N/A            N/A
  December 31, 1994 ....................           0.56            0.10            0.56         0.51           N/A            N/A

Income per common and common equivalent
share before extraordinary item (primary)
for the period ended(3):
  March 31, 1997 .......................          $0.93           $0.55           $0.85        $0.77          $0.43          $0.85
  March 31, 1996 .......................           0.80            0.63            0.78         0.71           0.34           0.77
  December 31, 1996 ....................           2.67            2.67            2.72         2.48           0.79           2.69
  December 31, 1995 ....................           0.71            2.32            1.09         0.99            N/A            N/A
  December 31, 1994 ....................           0.32            2.81            0.90         0.82            N/A            N/A

Income per common and common equivalent
share before extraordinary item (fully
diluted) for the period ended(3):
  March 31, 1997 .......................          $0.93           $0.55           $0.85        $0.77          $0.43          $0.85
  March 31, 1996 .......................           0.79            0.54            0.74         0.67           0.34           0.74
  December 31, 1996 ....................           2.64            2.36            2.63         2.39           0.79           2.61
  December 31, 1995 ....................           0.70            2.02            1.09(4)      0.99            N/A            N/A
  December 31, 1994 ....................           0.32            2.39            0.90(4)      0.82            N/A            N/A

</TABLE>


                    (footnotes begin on the following page.)

                                       60


<PAGE>   73



- ------------------------
(1)   The pro forma combined book value per common share represents the pro
      forma combined stockholders' equity for Charter One, RCSB and Haverfield
      divided by the pro forma outstanding common shares of the combined entity
      (based on the number of shares of Charter One Common Stock outstanding at
      the dates indicated plus the product of the number of shares of Haverfield
      Common Stock outstanding at the dates indicated and the Haverfield
      Exchange Ratio of .6136 plus the product of the number of shares of RCSB
      Common Stock outstanding at the dates indicated and the Exchange Ratio of
      .91). The RCSB pro forma equivalent book value per common share represents
      the pro forma combined book value per common share multiplied by the
      Exchange Ratio of .91. See "THE MERGER -- Merger Consideration."

(2)   The pro forma combined cash dividends declared per common share represent
      the historical cash dividends declared per share of Charter One Common
      Stock. The RCSB pro forma equivalent cash dividends declared per share
      represent the cash dividends declared on one share of Charter One Common
      Stock multiplied by the Exchange Ratio of .91. No assurance can be made
      that equivalent dividends will be paid in the future. The amount of
      dividends payable will be dependent upon, among other things, the earnings
      and financial condition of the combined company. See also "MANAGEMENT AND
      OPERATIONS AFTER THE MERGER -- Post-Merger Dividend Policy" and "THE
      MERGER -- Merger Consideration."

(3)   The pro forma combined per share income amounts are based upon the pro
      forma combined income amounts before extraordinary items for Charter One,
      Haverfield and RCSB and pro forma combined weighted average common and
      common equivalent shares outstanding. The pro forma weighted average
      common and common equivalent shares outstanding represent the weighted
      average number of common and common equivalent shares of Charter One
      Common Stock outstanding for the periods indicated plus the product of
      weighted average number of common and common equivalent shares of
      Haverfield Common Stock outstanding for the periods indicated and the
      Haverfield Exchange Ratio of .6136 plus the product of the weighted
      average number of common and common equivalent shares of RCSB common stock
      outstanding for the periods indicated and the Exchange Ratio of .91. See
      "RECENT DEVELOPMENTS." The RCSB pro forma equivalent per share income
      amounts represent the pro forma combined per share income amounts
      multiplied by the Exchange Ratio of .91. See "THE MERGER -- Merger
      Consideration."

(4)   Effect of conversion of preferred stock is antidilutive therefore, amount
      represents primary earnings per share.

(5)   To facilitate redemption of RCSB's preferred shares, declaration of the
      1996 third quarter common stock dividend was accelerated to May, 1996, one
      month earlier than RCSB's usual timing.

            DESCRIPTION OF CHARTER ONE FINANCIAL, INC. CAPITAL STOCK

       The following information does not purport to be complete and is subject
to and qualified in its entirety by reference to the provisions in the Charter
One Certificate of Incorporation.

GENERAL

       The Charter One Certificate of Incorporation authorizes the issuance by
Charter One of up to 200,000,000 shares of its capital stock consisting of
180,000,000 shares of Charter One Common Stock (par value $.01 per share) and
20,000,000 shares of Charter One Preferred Stock (par value $.01 per share). As
of the Charter One Record Date 46,249,711 shares of Charter One Common Stock and
no shares of Charter One Preferred Stock were issued and outstanding. Charter
One Common Stock is traded on the Nasdaq National Market under the symbol
"COFI." See "SUMMARY -- Comparative Stock Prices and Dividend Information." The
stock transfer agent and registrar for Charter One Common Stock is Boston
EquiServe, L.P.

COMMON STOCK

       Each share of Charter One Common Stock has the same relative rights and
is identical in all respects with each other share of Charter One Common Stock.
Charter One Common Stock represents non-withdrawable capital, is not of an
insurable type and is not insured by the FDIC or any other government agency.

       Subject to any prior rights of the holders of any Charter One Preferred
Stock then outstanding, holders of Charter One Common Stock are entitled to
receive such dividends as are declared by the Charter One Board out of funds
legally available therefor. Full voting rights are vested in the holders of
Charter One Common Stock, each share being entitled to one vote. See "COMPARISON
OF RIGHTS OF STOCKHOLDERS OF CHARTER ONE FINANCIAL, INC. AND RCSB FINANCIAL,
INC. -- Restrictions on Voting Rights; Quorum" and "-- Rights Agreements."
Subject to any prior rights of the holders of any Charter One Preferred Stock
then outstanding, in the event of liquidation, dissolution or winding up of
Charter One, holders of shares of Charter One Common Stock are entitled to
receive pro rata, any assets distributable to stockholders in respect of shares
held by them. Holders of shares of Charter One Common Stock do not have any
preemptive rights to subscribe for any additional securities which may be issued
by Charter One or cumulative voting rights. The outstanding shares of Charter
One Common Stock are fully paid and non-assessable.

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       Certain provisions of the Charter One Certificate of Incorporation may
have the effect of delaying, deferring or preventing a change in control of
Charter One pursuant to an extraordinary corporate transaction involving Charter
One, including a merger, reorganization, tender offer, transfer of substantially
all of its assets or a liquidation. Attached to each share of Charter One Common
Stock is a "Right" entitling the holder thereof to purchase shares of Series A
Participating Preferred Stock of Charter One upon the occurrence of certain
events as more fully described in the Rights Agreement. See "COMPARISON OF
RIGHTS OF STOCKHOLDERS OF CHARTER ONE FINANCIAL, INC. AND RCSB FINANCIAL, INC.
- -- Rights Agreements."

       The foregoing discussion of the Charter One Common Stock is qualified in
its entirety by reference to the description of the Charter One Common Stock
contained in Charter One's Registration Statement on Form 8-A (as amended) with
respect thereto, which is incorporated by reference in this Joint Proxy
Statement/Prospectus. See "INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE."

PREFERRED STOCK

       The Charter One Certificate of Incorporation authorizes the issuance by
Charter One of up to 20,000,000 shares of Charter One Preferred Stock (par value
$.01 per share), none of which was issued and outstanding as of the Charter One
Record Date.

       The Charter One Preferred Stock may be issued in one or more series at
such time or times and for such consideration or considerations as the Charter
One Board may determine. The Charter One Board is expressly authorized at any
time, and from time to time, to provide for the issuance of Charter One
Preferred Stock with such voting and other powers, preferences and relative,
participating, optional or other special rights, and qualifications, limitations
or restrictions thereof, as shall be stated and expressed in the Charter One
Board resolution providing for the issuance thereof. The Charter One Board is
authorized to designate the series and the number of shares comprising such
series, the dividend rate on the shares of such series, the redemption rights,
if any, any purchase, retirement or sinking fund provisions, any conversion
rights and any special voting rights. The ability of the Charter One Board to
issue Charter One Preferred Stock without stockholder approval could make an
acquisition by an unwanted suitor of a controlling interest in Charter One more
difficult, time-consuming or costly, or otherwise discourage an attempt to
acquire control of Charter One.

       Shares of Charter One Preferred Stock redeemed or acquired by Charter One
may return to the status of authorized but unissued shares, without designation
as to series, and may be reissued by the Charter One Board.

       See also "COMPARISON OF RIGHTS OF STOCKHOLDERS OF CHARTER ONE FINANCIAL,
INC. AND RCSB FINANCIAL, INC. -- Rights Agreements."

                     COMPARISON OF RIGHTS OF STOCKHOLDERS OF
              CHARTER ONE FINANCIAL, INC. AND RCSB FINANCIAL, INC.

INTRODUCTION

       Upon the consummation of the Merger, holders of RCSB's Common Stock,
whose rights are presently governed by DGCL and RCSB's Certificate of
Incorporation and RCSB Bylaws and, indirectly, Rochester Bank's organization
certificate and bylaws, will become stockholders of Charter One, also a Delaware
corporation. Accordingly, their rights will be governed by the DGCL and the
Charter One Certificate of Incorporation and Charter One Bylaws and, indirectly,
Charter Michigan's articles of incorporation (the "Charter Michigan Articles")
and bylaws (the "Charter Michigan Bylaws") and Charter One Bank's charter and
bylaws. The following discussion summarizes the material differences affecting
the rights of stockholders but is not intended to be a complete statement of all
differences and is qualified in its entirety by reference to the DGCL, the
Charter One Certificate of Incorporation and the Charter One Bylaws, the RCSB
Certificate of Incorporation and the RCSB Bylaws, the Charter Michigan Articles
and the Charter Michigan Bylaws, and the respective charters and bylaws of
Rochester Bank and Charter One Bank.

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ISSUANCE OF CAPITAL STOCK

       The RCSB Certificate of Incorporation authorize the issuance of
50,000,000 shares of common stock, par value $1.00 per share, and 50,000,000
shares of preferred stock, par value $1.00 per share. The Charter One
Certificate of Incorporation currently authorizes the issuance of 180,000,000
shares of common stock, par value $.01 per share, and 20,000,000 shares of
serial preferred stock, par value $.01 per share. As of the RCSB Record Date and
the Charter One Record Date, 14,816,228 and 46,249,711 shares of RCSB Common
Stock and Charter One Common Stock, respectively, were issued and outstanding.
For information regarding the number of shares of Charter One's Common Stock
that would have been issued on a pro forma basis upon the consummation of the
Merger as of certain dates, see "UNAUDITED PRO FORMA COMBINED FINANCIAL
STATEMENTS." RCSB and Charter One are each authorized to issue additional shares
of capital stock without stockholder approval up to the amount authorized.

PAYMENT OF DIVIDENDS

       The ability of Charter One and RCSB to pay dividends on their common
stock is governed by Delaware law. Delaware corporations may pay dividends out
of surplus or, if there is no surplus, out of net profits for the fiscal year in
which declared and for the preceding fiscal year. Section 170 of the DGCL also
provides that dividends may not be paid out of net profits if, after the payment
of the dividends, the capital of the corporation is less than the capital
represented by the outstanding stock of all classes having a preference upon the
distribution of assets.

       The ability of RCSB and Charter One to pay dividends on their common
stock also is affected by restrictions upon their receipt of dividends from
their respective subsidiary savings institutions. See "SUMMARY -- Comparative
Stock Prices and Dividend Information" for additional information.

ADVANCE NOTICE REQUIREMENTS FOR PRESENTATION OF NEW BUSINESS AND NOMINATIONS OF
DIRECTORS AT ANNUAL MEETINGS OF STOCKHOLDERS

       The RCSB Bylaws generally provide that a proposal offered by a
stockholder to be presented at an annual meeting which has not been recommended
by the Board of Directors must be received by RCSB not less than 120 calendar
days before the date RCSB's proxy statement was first mailed to stockholders in
connection with the previous year's annual meeting of stockholders. In order to
make a nomination for the election of a director under the RCSB Bylaws, a
stockholder must provide the Chairman of the Board of RCSB with written notice
of such nomination, in prescribed form, not less than 90 calendar days nor more
than 120 calendar days prior to the date RCSB's proxy statement was first mailed
to stockholders in connection with the previous year's annual meeting of
stockholders.

       The Charter One Bylaws specify that notice of any stockholder nomination
or proposal for new business must be received by Charter One at least 60 but no
more than 90 days in advance of the annual meeting; however, in the event that
fewer than 70 days' notice or prior public disclosure of the date of the meeting
is given or made, written notice must be submitted no later than the tenth day
following the earlier of the date such notice is given or public disclosure
made.

CUMULATIVE VOTING FOR ELECTION OF DIRECTORS

       Under Section 214 of the DGCL, a corporation may permit cumulative voting
in its certificate of incorporation. The RCSB stockholders and the Charter One
stockholders are not permitted to cumulate their votes in the election of
directors pursuant to their respective certificates of incorporation. The
absence of cumulative voting rights effectively means that the holders of a
majority of the shares voted at a meeting of stockholders may, if they so
choose, elect all directors to be selected at that meeting, thus precluding
minority stockholder representation on such Board.

RESTRICTIONS ON VOTING RIGHTS; QUORUM

       The RCSB Certificate of Incorporation does not contain any restrictions
on voting rights. The Charter One Certificate of Incorporation currently
restricts the voting rights of any Related Person (as defined in the Charter One
Certificate of Incorporation) with respect to each vote in excess of 20 percent
of the voting power of the outstanding shares to 1/100 of a vote.

       The RCSB Bylaws and the Charter One Bylaws both provide that the holders
of a majority of shares of common stock entitled to vote present in person or by
proxy at a meeting of stockholders constitutes a quorum at any

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such meeting. Pursuant to the Charter One Certificate of Incorporation, however,
to the extent the voting rights of any Related Person are reduced, such reduced
voting power will be considered for purposes of determining a quorum.

NUMBER AND TERM OF DIRECTORS

       Pursuant to the RCSB Certificate of Incorporation and the RCSB Bylaws,
the Board of Directors shall consist of not less than seven nor more than 18
members. The RCSB Bylaws provide that the number of directors shall be
determined by a resolution adopted by at least a majority of the RCSB Board. The
RCSB Certificate of Incorporation and Bylaws further provide that the RCSB Board
will be divided into three classes each class to contain, as near as possible,
one-third of the total number of directors with the term of office of each class
lasting three years.

       The Charter One Certificate of Incorporation provides that the Charter
One Board may consist of between seven and 16 directors, as fixed by a
resolution adopted by the affirmative vote of a majority of Charter One's
continuing directors as set forth in the Charter One Bylaws. As of April 24,
1997, the Charter One Board resolved that the Board of Directors shall consist
of 15 members. The Charter One Certificate of Incorporation also provides that
the Charter One Board shall be divided into three classes with the term of
office of one class expiring each year. See "Special Provisions to Charter One's
Bylaws." Pursuant to this Joint Proxy/Prospectus, the stockholders of Charter
One are being asked to vote on the Amendment. The Amendment would amend the
Charter One Certificate by authorizing the number of directors of the Charter
One Board to be fixed by, or in the manner provided in, the Charter One Bylaws.
See "AMENDMENT TO THE SECOND RESTATED CERTIFICATE OF INCORPORATION OF CHARTER
ONE FINANCIAL, INC."

REMOVAL OF DIRECTORS

       The RCSB Bylaws provide that directors may be removed at any time but
only for cause by the vote of the majority of the shares voting.

       The Charter One Certificate of Incorporation provides that directors may
be removed only for cause by a vote of a majority of the shares entitled to be
cast in the election of directors. The Charter One Certificate of Incorporation
provides that a vote to remove a director may only occur at an annual meeting of
stockholders or at a meeting of stockholders called expressly for that purpose.
The Charter One Certificate of Incorporation limits what will constitute cause
for removal to conviction of a felony by a court of competent jurisdiction, an
adjudication by a court of competent jurisdiction of gross negligence on the
part of a director or misconduct in the performance of such director's duty to
Charter One.

FILLING VACANCIES ON THE BOARD OF DIRECTORS

       Both the RCSB Bylaws and the Charter One Certificate of Incorporation
provide that any vacancy that occurs on the board of directors may be filled by
a majority vote of the board of directors and that any director so chosen shall
hold office for a term expiring at the meeting of stockholders at which the term
of the class to which they have been elected expires.

AMENDMENT TO THE SECOND RESTATED CERTIFICATE OF INCORPORATION

       Section 242 of the DGCL requires approval of stockholders holding a
majority of the voting power of a corporation's voting stock in order to amend a
corporation's certificate of incorporation.

       The RCSB Certificate of Incorporation generally may be amended by both
the majority vote of its Board of Directors and a majority of the outstanding
shares of its voting stock; however, the provisions of the RCSB Certificate of
Incorporation providing for the number, classification, election and removal of
directors, and supermajority provisions may be amended only by the affirmative
vote of 75 percent of the outstanding shares of the RCSB Common Stock entitled
to vote and not less than 50 percent of the shares owned by stockholders other
than Interested Stockholders (as defined in the and associates.

       The Charter One Certificate of Incorporation generally may be amended by
a majority vote of the Charter One Board and also by a majority of the
outstanding shares of its voting stock; however, approval of 90 percent of the
outstanding voting stock is required to amend the provision of the Charter One
Certificate of Incorporation providing for approval by 90 percent of the
stockholders of certain business combinations with a 10 percent or greater
stockholder,

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and approval of 75 percent of the outstanding voting stock is generally required
to amend certain other provisions (including provisions relating to the number,
classification, election and removal of directors; the call of special
stockholder meetings; criteria for evaluating certain offers; certain business
combinations; limitations on payment of greenmail; stockholder action without a
meeting; indemnification of directors; limitation of directors' liability; and
amendments to the Charter One Certificate of Incorporation and Charter One
Bylaws). In addition, the provisions regarding certain business combinations and
greenmail that call for approval by a "super-majority" of the outstanding voting
stock (excluding the vote of Related Persons and Interested Persons,
respectively, as those terms are defined in the Charter One Certificate of
Incorporation) may be amended only by the same "super-majority" called for by
those provisions.

AMENDMENT AND REPEAL OF BYLAWS

       Section 109 of the DGCL places the power to adopt, amend or repeal
by-laws in the corporation's stockholders, but permits the corporation, in its
certificate of incorporation, to vest such power with the board of directors
also.

       Generally, the RCSB Certificate of Incorporation provides that the Board
of Directors can make, alter, amend, rescind or repeal any Bylaw, however any
Bylaw made by the RCSB Board can be altered amended or repealed by the
stockholders of RCSB. Notwithstanding the foregoing, a vote of the majority of
the entire RCSB Board or the vote of the holders of 75 percent of the RCSB
Common Stock and the vote of holders of at least 50 percent of the shares of
RCSB Common Stock other than Interested Stockholders is required to alter,
amend, rescind or repeal the provisions of the RCSB Bylaws regarding: special
meetings; the number, classification, qualification, mandatory retirement,
nominations and removal of members of the RCSB Board; and amendments to the RCSB
Bylaws.

       The Charter One Bylaws may be adopted, amended or repealed by the
affirmative vote of the holders of shares of at least 75 percent of the total
votes eligible to be cast at a meeting duly called and held or by a resolution
adopted by a majority of the Charter One Board.

CONTROL SHARE ACQUISITIONS

       Neither Delaware law, the RCSB Certificate of Incorporation nor the
Charter One Certificate of Incorporation contains a control share acquisition
statute or provision. See " -- Business Combinations with Certain Persons" for
certain restrictions imposed by Delaware law, the RCSB Certificate of
Incorporation and the Charter One Certificate of Incorporation regarding
business combinations.

BUSINESS COMBINATIONS WITH CERTAIN PERSONS

       Delaware Business Combination Statute. Section 203 of the DGCL ("Section
203"), which applies to RCSB and Charter One, regulates transactions with major
stockholders after they become major stockholders. Section 203 prohibits a
Delaware corporation from engaging in mergers, dispositions of 10 percent or
more of its assets, issuances of stock and other transactions ("business
combinations") with a person or group that owns 15 percent or more of the voting
stock of the corporation (an "interested stockholder"), for a period of three
years after the interested stockholder crosses the 15 percent threshold. These
restrictions on transactions involving an interested stockholder do not apply in
certain circumstances, including those in which (a) before the interested
stockholder owned 15 percent or more of the voting stock, the board of directors
approved the business combination or the transaction that resulted in the person
or group becoming an interested stockholder; (b) in the transaction that
resulted in the person or group becoming an interested stockholder, the person
or group acquired at least 85 percent of the voting stock other than stock owned
by inside directors and certain employee stock plans; (c) after the person or
group became an interested stockholder, the board of directors and at least
two-thirds of the voting stock other than stock owned by the interested
stockholder approved the business combination; or (d) certain competitive
bidding circumstances were present.

       The RCSB Certificate of Incorporation requires the vote of the holders of
at least 80 percent of the RCSB voting stock and the affirmative vote of the
holders of at least 50 percent of the RCSB voting stock not owned by an
Interested Stockholder to approve any "business combination" unless the business
combination in question is approved by a majority of Continuing Directors (as
defined in the RCSB Certificate of Incorporation) or certain price and procedure
requirements are met. The RCSB Certificate of Incorporation defines "business
combination" to include the following transactions involving an owner of 20
percent or more of the voting stock of RCSB or that person's, associates or
affiliates: a merger or consolidation, sale, lease, exchange, mortgage, pledge,
transfer of, or other disposition of assets

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valued at five percent or more of the outstanding capital stock of RCSB;
issuance or transfer of securities representing five percent or more of the
outstanding capital stock of RCSB; or any reclassification of securities or
recapitalization.

       The Charter One Certificate of Incorporation sets forth stockholder
approval requirements for mergers and other similarly important corporate
transactions involving substantial stockholders. The Charter One Certificate of
Incorporation generally would prohibit a merger or consolidation, sale of $5
million or more of assets, issuance or transfer of $5 million or more of
securities of Charter One, the adoption of a plan or proposal calling for the
liquidation or dissolution of Charter One or a subsidiary, the reclassification
of Charter One's securities or any agreement, contract or other arrangement
providing, directly or indirectly for any of the foregoing (a "business
transaction"), involving a "related person" (generally, a beneficial owner of 10
percent or more of Charter One's outstanding voting stock), unless, during the
five years following the related person's acquisition of 10 percent of Charter
One's voting power, the business transaction is approved by 90 percent of the
holders of Charter One's voting stock or the business transaction or the
transaction by which the related person acquires such status is first approved
by a majority of Charter One's Continuing Directors (as defined in the Charter
One Certificate of Incorporation). Business transactions with related persons
after five years from the date the related person achieves such status require
the approval of at least 75 percent of the holders of Charter One's voting stock
not owned by the related person (at a meeting held no earlier than five years
after the date the related person acquires such status) unless the proposed
transaction either is approved by a majority of the Continuing Directors, is
solely between Charter One and any subsidiary thereof or the business
transaction satisfies certain fair price criteria and various procedural
requirements.

PREVENTION OF GREENMAIL

       The Charter One Certificate of Incorporation generally would prohibit
Charter One from acquiring, directly or indirectly, from an "interested
person" (generally, a beneficial owner of 5 percent or more of Charter One's
voting stock) any of its equity securities of any class, unless (i) the
acquisition is approved by the holders of at least 75 percent of Charter One's
voting stock not owned by the interested person, (ii) the acquisition is made   
as part of a tender or exchange offer by Charter One or a subsidiary thereof to
purchase securities of the same class on the same terms to all holders of such
securities and in compliance with the Exchange Act and the rules and
regulations thereunder; (iii) the acquisition is pursuant to an open market
purchase program approved by a majority of the Board of Directors, including a
majority of the Continuing Directors; or (iv) the acquisition is at or below
the market price (generally, the highest sale price for the stock on the
acquisition date on the Nasdaq National Market) and is approved by a majority
of the Board of Directors, including a majority of the Continuing Directors.

       The RCSB Certificate of Incorporation does not contain a similar
restriction.

LIMITATIONS ON DIRECTORS' LIABILITY

       Under Delaware law, a Delaware corporation may include in its certificate
of incorporation a provision that eliminates or limits a director's personal
liability for monetary damages for breach of his or her fiduciary duty, subject
to certain limitations. Both the RCSB Certificate of Incorporation and the
Charter One Certificate of Incorporation provide that a director shall not be
personally liable to the corporation or its stockholders for monetary damages
arising out of the director's breach of his or her duty of care, except (i) for
any breach of a 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 Section 174 of
the DGCL which imposes liability on directors for unlawful payment of dividends
or unlawful stock repurchases; or (iv) for any transactions from which the
director derived any improper personal benefit. Further, the RCSB Certificate
of Incorporation and the Charter One Certificate of Incorporation provide that  
if Delaware law is subsequently amended to eliminate or limit director
liability with respect to these actions, then the liability of the directors
shall be eliminated or limited to the fullest extent of the law. These
provisions do not, however, relieve directors of their duty to act with due
care. In addition, these provisions do not prevent a stockholder from seeking
equitable remedies, including an injunction prohibiting a proposed action or
transaction or rescission of a consummated action or transaction.

INDEMNIFICATION

       Under Section 145 of the DGCL, directors, officers, employees and other
individuals may be indemnified against expenses (including attorneys' fees),
judgments, fines and amounts paid in settlement in connection with specified
actions, suits or proceedings, whether civil, criminal, administrative or
investigative (other than an action by,

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or in the right of the corporation - a "derivative action") if they acted in
good faith and in a manner they reasonably believed to be in, or not opposed to,
the best interests of the corporation, and, regarding any criminal action or
proceeding, had no reasonable cause to believe their conduct was unlawful. A
similar standard is applicable in the case of derivative actions, except that
indemnification only extends to expenses (including attorneys' fees) incurred in
connection with the defense or settlement of such actions. In the case of
derivative actions, the DGCL requires court approval before there can be any
indemnification when the person seeking indemnification has been found liable to
the corporation. To the extent that a person otherwise eligible to be
indemnified is successful on the merits or otherwise of any claim or defense
described above, indemnification for expenses (including attorneys' fees)
actually and reasonably incurred is made mandatory by the DGCL.

       The RCSB Bylaws state that the directors, officers and employees of RCSB
shall be entitled to mandatory indemnification, including the advancement of
expenses, in connection with any action, suit or proceeding, whether civil or
criminal, in which such person is made a party by reason of the fact that such
person is or was a director, officer or employee of RCSB or of any other entity
or enterprise which any director, officer or employee of RCSB served in any
capacity at the request of RCSB, to the fullest extent authorized and permitted
by law, including any non-statutory indemnification permissible under law. RCSB
is authorized to grant any statutory or nonstatutory indemnification pursuant to
a resolution of the stockholders or of the RCSB Board or pursuant to an
agreement between RCSB and the officer, director or employee. Such right of
indemnification is not exclusive of any other rights to which such director,
officer or employee may be or become entitled, and shall inure to the benefit of
the executors and administrators of each such person. The RCSB Bylaws also
provide that the extent of mandatory indemnification shall in no circumstances
be narrower than permitted in the DGCL and that the scope of its indemnification
provision shall be broadened to the extent permitted by amendments to or
applications of the DGCL or other applicable laws which are subsequently
adopted.

       The Charter One Certificate of Incorporation generally provides for the
same indemnification as the DGCL, including the payment of expenses in advance
of the final disposition of an action, to the extent permitted by law.
Additionally, Charter One's provision specifies that any indemnification payment
to which an individual is entitled must be made within 60 days of receipt of a
written request from the individual. Any advancement of expenses must be made
within 20 days of the receipt of a written request. The Charter One Certificate
of Incorporation also provides for the continuation of indemnification after the
termination of the person's association with Charter One.

MERGERS, ACQUISITIONS AND CERTAIN OTHER TRANSACTIONS

       Section 251 of the DGCL requires approval of mergers, consolidations and
dispositions of all or substantially all of a corporation's assets by a majority
of the voting power of the corporation (other than in so-called parent-
subsidiary mergers), unless the certificate of incorporation specifies a
different percentage.

ACTION WITHOUT A MEETING

       Section 228 of the DGCL permits any action required or permitted to be
taken at a stockholder's meeting to be taken by written consent signed by the
holders of the number of shares that would have been required to effect the
action at an actual meeting of the stockholders. Generally, holders of a
majority of outstanding shares can effect such an action. The DGCL also provides
that a corporation's certificate of incorporation may restrict or prohibit
stockholders' actions without a meeting. The RCSB Certificate of Incorporation
states that any action which may be taken at any annual or special meeting of
stockholders may be taken by written consent without a meeting if a consent in
writing, setting forth the action so taken, shall be signed by all of the
stockholders entitled to vote on the action. The Charter One Certificate of
Incorporation prohibits stockholders' action without a meeting.

SPECIAL MEETINGS OF STOCKHOLDERS

       Under Section 211(d) of the DGCL, the board of directors or those persons
authorized by the corporation's certificate of incorporation or by-laws may call
a special meeting of the corporation's stockholders. The RCSB Bylaws state that
a special meeting of stockholders for any purpose can be called at any time by
the vote of at least three-fourths of the entire RCSB Board, by the Chairman of
the Board or by the President. The Charter One Certificate of Incorporation
provides that a special meeting may only be called by a majority of the board of
directors, including a majority of Continuing Directors (as defined in the
Charter One Certificate of Incorporation).

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PREEMPTIVE RIGHTS

       Under Section 102 of the DGCL, no statutory preemptive rights will exist,
unless a corporation's certificate of incorporation specifies otherwise. Under
both the RCSB Certificate of Incorporation and Charter One Certificate of
Incorporation stockholders do not have preemptive rights.

APPRAISAL RIGHTS OF DISSENTING STOCKHOLDERS

       Under Section 262 of the DGCL, appraisal rights are available to
dissenting stockholders in connection with certain mergers or consolidations.
However, unless the certificate of incorporation otherwise provides, Section 262
does not provide for appraisal rights (i) if the shares of the corporation are
listed on a national securities exchange or designated as a national market
systems security on an inter-dealer quotations system by the National
Association of Securities Dealers, Inc. or held of record by more than 2,000
stockholders (as long as the stockholders receive in the merger shares of the
surviving corporation or of any other corporation the shares of which are listed
on a national securities exchange or designated as a national market systems
security on an inter-dealer quotations system by the National Association of
Securities Dealers, Inc. or held of record by more than 2,000 stockholders) or
(ii) if the corporation is the surviving corporation and no vote of its
stockholders is required on the merger. The DGCL does not provide appraisal
rights to stockholders who dissent from the sale of all or substantially all of
a corporation's assets or from an amendment to the corporation's certificate of
incorporation, although a corporation's certificate of incorporation may so
provide. Neither the RCSB Certificate of Incorporation or the Charter One
Certificate of Incorporation provide for appraisal rights beyond those
specifically provided under the DGCL.

SPECIAL PROVISIONS TO CHARTER ONE'S BYLAWS

       In accordance with the Agreement and Plan of Merger by and between
Charter One and FirstFed, dated May 30, 1995, Charter One adopted certain
provisions to its Bylaws to govern directors, executive officers and committees
to the exclusion of any other provision in the Bylaws.

       The provisions provide that the Charter One Board shall consist of 16
directors (subsequently reduced to 15), one-half of whom were selected by
Charter One and one-half of whom were selected by FirstFed. For a period of four
years following the effective date of the merger with FirstFed, Charles J. Koch
and Jerome L. Schostak shall serve as Chairman and Vice Chairman, respectively,
of the Board of Directors. The Charter One Bylaws also provide that for four
years following the effective date of the merger with FirstFed, if any person
leaves the Board of Directors, their successor will be the person recommended by
the directors who were directors of Charter One prior to the merger with
FirstFed, or their successors, if such departing director was a director of
Charter One prior to the merger with FirstFed, or by the directors who were
directors of FirstFed prior to its merger with Charter One, or their successors,
if the departing director was a director of FirstFed prior to its merger with
Charter One.

       The Charter One Bylaws also provide that for a period of four years
following the effective date of the merger, a vote of two-thirds of the entire
Charter One Board shall be necessary to approve (i) any amendment to the Charter
One Certificate of Incorporation or Bylaws, (ii) any merger, acquisition, sale
of substantially all of its assets or other extraordinary corporate transaction
involving Charter One, Charter One Bank or any other significant financial
institution subsidiary of Charter One or (iii) the dismissal or replacement of
any of the executive officers of Charter One or Charter One Bank or other
significant financial institution subsidiary.

       The Charter One Bylaws also provide that for a period of at least four
years following the merger with FirstFed, the Charter One Board as the Surviving
Corporation shall have a five person Executive Committee and such other
committees as the Charter One Board shall establish in accordance with Section
141 of the DGCL, the Charter One Certificate of Incorporation and the Charter
One Bylaws.

RIGHTS AGREEMENTS

       RCSB Rights Agreement. In 1990, the RCSB Board adopted a shareholder
rights plan and declared a dividend distribution of one right ("RCSB Right") for
each outstanding share of RCSB Common Stock and authorized and directed that
each share of RCSB Common Stock issued after June 4, 1990 and before the
earliest of (x) an RCSB Distribution Date (as defined below), (y) June 3, 2000,
or (z) the date the RCSB Rights are redeemed, be issued with an RCSB Right
attached. The RCSB Rights will separate from the RCSB Common Stock and an RCSB
Distribution

                                       68


<PAGE>   81



Date will occur upon the earlier of (i) ten business days after a public
announcement that a person or group of affiliated or associated persons has
become an "RCSB Acquiring Person" by acquiring beneficial ownership of 20
percent or more of the outstanding shares of RCSB Common Stock, or (ii) ten
business days following the commencement of (or public announcement of the
intention to commence) a tender offer or exchange offer that would result in a
person or group beneficially owning 20 percent or more of the outstanding
shares of RCSB Common Stock. Following an RCSB Distribution Date, each RCSB
Right will entitle the holder (other than RCSB Acquiring Persons and certain
related persons or entities) to purchase a unit consisting of one one-hundredth
of a share of RCSB Series A Junior Participating Preferred Stock ("RCSB Series
A Preferred Stock") at a purchase price of $100 per unit, subject to
adjustment. The RCSB Rights are not exercisable until the RCSB Distribution
Date.

       The RCSB Rights Agreement further provides that in the event any person
or group of affiliated or associated persons is designated as an adverse person
or becomes the beneficial owner of 25 percent or more of the outstanding shares
of RCSB Common Stock (except pursuant to an offer for all outstanding shares of
RCSB Common Stock that is determined to be fair and in the best interest of
shareholders), then holders of RCSB Rights not previously exercised or redeemed
by RCSB (other than RCSB Rights held by Acquiring Persons) will be entitled to
receive, upon exercise, RCSB Common Stock having a market value equal to two
times the exercise price of the RCSB Right.

       In addition, in the event (i) RCSB is acquired in a merger or other
business combination transaction with an RCSB Acquiring Person or (ii) 50
percent or more of RCSB's assets or earning power are sold or transferred to an
RCSB Acquiring Person, each previously unexercised RCSB Right (other than RCSB
Rights held by RCSB Acquiring Persons and certain related persons or entities)
will entitle the holder to receive, upon exercise, common stock of the acquiring
company having a value equal to two times the exercise price of the RCSB Right.

       The RCSB Rights will expire on June 3, 2000, unless earlier redeemed.
Subject to certain limitations, the rights may be redeemed by the RCSB Board or,
in certain circumstances, by the shareholders of RCSB.


       Charter One Rights Agreement. On November 20, 1989, the Charter One Board
declared a dividend distribution of one Right for each outstanding share of
Charter One Common Stock to stockholders of record at the close of business on
December 1, 1989 (the "Rights Record Date"). As long as the Rights are attached
to the common stock, Charter One will issue one Right with each new share of
common stock so that each outstanding share will have an attached Right. Except
as set forth below, each Right, when exercisable, entitles the registered
holder to purchase from Charter One 1/100 share of preferred stock      
designated as Series A Participating Preferred Stock, par value $0.01 per share
(the "Series A Preferred Stock"), at a price of $40.00 (the "Purchase Price"),
subject to adjustment. The description and terms of the Rights are set forth in
a Rights Agreement between Charter One and The First National Bank of Boston,
as Rights Agent. See "INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE."

       The Rights are attached to all certificates representing shares of
Charter One's outstanding common stock, and no separate Rights Certificates (as
defined below) have been distributed. Until the earlier to occur of (i) a public
announcement that, without the prior consent of Charter One, a person or group
of affiliated or associated persons has acquired, or obtained the right to
acquire, beneficial ownership of securities having 20 percent or more of the
voting power of all outstanding voting securities of Charter One (an "Acquiring
Person") or (ii) ten days (unless such date is extended by the Charter One
Board) following the commencement of (or a public announcement of an intention
to make) a tender offer or exchange offer which would result in any person or
group and related persons becoming an Acquiring Person, without the prior
consent of the Company (the earlier of such dates being called the "Distribution
Date"), the Rights will be evidenced, with respect to any of the common stock
certificates outstanding as of the Distribution Date, by such common stock
certificate. Until the Distribution Date, the Rights will be transferred with,
and only with, common stock certificates. Until the Distribution Date (or
earlier redemption or expiration of the Rights), the surrender for transfer of
any certificates for common stock outstanding as of the Distribution Date will
also constitute the transfer of the Rights associated with the common stock
represented by such certificate. As soon as practicable following the
Distribution Date, separate certificates evidencing the Rights ("Rights
Certificates") will be mailed to holders of record of common stock as of the
close of business on the Distribution Date, and the separate Rights Certificates
alone will evidence the Rights.

       The Rights are not exercisable until the Distribution Date. The Rights
will expire on the earlier of (i) December 1, 1999, (ii) consummation of a
merger transaction with a person or group who acquired Charter One Common Stock
pursuant to a Permitted Offer (generally, a tender offer or exchange offer for
all outstanding shares of Charter One

                                       69


<PAGE>   82



Common Stock at a price and on terms determined by at least a majority of the
members of the Charter One Board to be both adequate and otherwise in the best
interests of Charter One and its stockholders) and also is offering in the
merger the same price per share and form of consideration paid in the Permitted
Offer, or (iii) redemption by Charter One as described below.

       The Purchase Price payable, and the number of shares of Series A
Preferred Stock or other securities or property issuable upon exercise of the
Rights are subject to adjustment from time to time to prevent dilution (i) in
the event of a stock dividend on, or a subdivision, combination or
reclassification of, the Series A Preferred Stock, (ii) upon the grant to
holders of the Series A Preferred Stock of certain rights or warrants to
subscribe for Series A Preferred Stock, or certain convertible securities having
the same or more favorable rights, privileges and preferences as the Series A
Preferred Stock at less than the current market price of the Series A Preferred
Stock, or (iii) upon the distribution to holders of the Series A Preferred Stock
of evidences of indebtedness or assets (excluding regular quarterly cash
dividends out of earnings or retained earnings) or of subscription rights or
warrants (other than those referred to above).

       In the event that a person becomes an Acquiring Person (unless pursuant
to a Permitted Offer), proper provision shall be made so that each holder of a
Right (other than an Acquiring Person) will for a 60-day period thereafter have
the right to receive upon exercise that number of 1/100 share of Series A
Preferred Stock equal to the number of shares of Charter One Common Stock having
a market value (immediately prior to the triggering of the Right) of two times
the exercise price of the Right, to the extent available, and then (after all
authorized and unreserved shares of Series A Preferred Stock have been issued)
an equal number of an equivalent security (such as another equity security with
at least the same economic value as 1/100 share of Series A Preferred Stock)
(such right being called the "Flip-In Right"). In addition, Charter One shall be
entitled (but not required) to deliver, upon exercise of the Flip-In Right, in
lieu of 1/100 share of Series A Preferred Stock, an equal number of shares of
common stock, to the extent they are available. For example, at an exercise
price of $40.00 per Right, each Right not owned by an Acquiring Person following
an event set forth in this paragraph would entitle its holder to purchase common
stock with a market value immediately prior to the triggering of the Right of
$80.00 for $40.00.

       In the event that, after the first date of public announcement by Charter
One or an Acquiring Person that an Acquiring Person has become such, Charter One
is involved in a merger or other business combination transaction in which its
common stock is exchanged or changed, or 50 percent or more of Charter One's
assets or earning power is sold (in one transaction or a series of
transactions), proper provision shall be made so that each holder of a Right
(other than the Acquiring Person) shall thereafter have the right to receive,
upon the exercise thereof at the then current exercise price of the Right, that
number of shares of common stock of the acquiring company (or, in the event
there is more than one acquiring company, the acquiring company receiving the
greatest portion of the assets or earning power transferred) which at the time
of such transaction would have a market value (immediately prior to the
triggering of the Right) of two times the exercise price of the Right (such
Right being called the "Flip-Over Right"). For example, at an exercise price of
$40.00 per Right, each Right not owned by an Acquiring Person following an event
set forth in this paragraph would entitle its holder to purchase common stock of
the acquiring company with a market value immediately prior to the triggering of
the Right of $80.00 (or, in the event there is more than one acquiring company,
the acquiring company receiving the greatest portion of the assets or earning
power transferred) for $40.00.

       The holder of a Right will continue to have the Flip-Over Right whether
or not such holder exercises the Flip-In Right. Upon the occurrence of any of
the events giving rise to the exercisability of the Flip-Over Right or the
Flip-In Right, any Rights that are or were at any time owned by an Acquiring
Person engaging in any of such transactions or receiving the benefits thereof on
or after the time the Acquiring Person becomes such shall become void insofar as
they related to the Flip-Over Right or the Flip-In Right.

       With certain exceptions, no adjustments in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1
percent in such Purchase Price. No fractions of shares will be issued and, in
lieu thereof, an adjustment in cash will be made based on the market price of
the Common Stock on the last trading date prior to the date of exercise.

       At any time prior to the earlier to occur of (i) a person becoming an
Acquiring Person or (ii) the expiration of the Rights, Charter One may redeem
the Rights in whole, but not in part, at a price of $0.01 per Right (the
"Redemption Price"), which redemption shall be effective upon the action of the
Charter One Board. Additionally, Charter One may thereafter redeem the then
outstanding Rights in whole, but not in part, at the Redemption Price, provided
that such

                                       70


<PAGE>   83



redemption is incidental to a merger or other business combination transaction
or series of transactions involving Charter One but not involving an Acquiring
Person or any person who was an Acquiring Person or following an event giving
rise to, and the expiration of the exercise period for, the Flip-In Right if and
for as long as no Acquiring Person beneficially owns securities representing 20
percent or more of the voting power of Charter One's voting securities. The
redemption of Rights described in the preceding sentence shall be effective only
as of such time when the Flip-In Right is not exercisable, and in any event,
only after 10 business days prior notice. Upon the effective date of the
redemption of the Rights, the right to exercise the Rights will terminate and
the only right of the holders of Rights will be to receive the Redemption Price.

       The Series A Preferred Stock purchasable upon exercise of the Rights will
be nonredeemable. Each share of Series A Preferred Stock will have a
preferential quarterly dividend in an amount equal to 100 times the dividend
declared on each share of Common Stock, but in no event less than $1.00. In the
event of liquidation, the holders of Series A Preferred Stock will receive a
preferred liquidation payment per 1/100 share thereof equal to the greater of
the issuance price thereof or the payment made per each share of Charter One
Common Stock.

       Each share of Series A Preferred Stock will have 100 votes, voting
together with the shares of Charter One Common Stock.

       In the event of any merger, consolidation or other transaction in which
shares of Charter One Common Stock are exchanged, each share of Series A
Preferred Stock will be entitled to receive 100 times the amount and type of
consideration received per share of common stock. The rights of the Series A
Preferred Stock as to dividends, liquidation and voting, and in the event of
mergers and consolidations, are protected by customary anti-dilution provisions.
Fractional shares of Series A Preferred Stock will be issuable; however, Charter
One may elect to distribute depository receipts in lieu of such fractional
shares. In lieu of fractional shares other than fractions that are multiples of
1/100 share, an adjustment in cash will be made based on the market price of the
Series A Preferred Stock on the last trading date prior to the date of exercise.

       Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of Charter One, including, without limitation, the right
to vote or to receive dividends. While the distribution of the Rights will not
be taxable to stockholders or to Charter One, stockholders may, depending upon
the circumstances, recognize taxable income should the Rights become exercisable
or upon the occurrence of certain events thereafter.

       Charter One and the Rights Agent may from time to time supplement or
amend the Rights Agreement without the consent of the holders of the Rights in
order to cure any ambiguity or to correct any defect or inconsistency contained
therein. In addition, prior to the Distribution Date, Charter One and the Rights
Agent may make such changes to the provisions of the Rights Agreement as Charter
One deems necessary or desirable. Following the Distribution Date, Charter One
and the Rights Agent may change or supplement the provisions of the Rights
Agreement in any manner which Charter One deems necessary or desirable and which
will not adversely affect the interests of the holders of the Rights.

       Charter One currently has reserved 600,000 shares of Preferred Stock for
issuance upon exercise of the Rights. As of the Charter One Record Date, there
were 46,249,711 shares of Charter One Common Stock, and therefore 46,249,711
Rights, outstanding. For information regarding the number of shares of Charter
One Common Stock, and therefore Rights, expected to be outstanding upon the
consummation of the Merger, see "UNAUDITED PRO FORMA COMBINED FINANCIAL
STATEMENTS."

       The Rights have certain anti-takeover effects. The Rights could cause
substantial dilution to a person or group that attempts to acquire Charter One
(other than pursuant to a Permitted Offer or with Charter One's prior approval)
without conditioning the offer on the Rights being redeemed or substantially all
of the Rights being acquired. However, the Rights should not interfere with any
merger or other business combination approved by Charter One with a person other
than an Acquiring Person because the Rights are redeemable under those
circumstances.

                                       71


<PAGE>   84



          AMENDMENT TO THE SECOND RESTATED CERTIFICATE OF INCORPORATION
                         OF CHARTER ONE FINANCIAL, INC.

       The Charter One Board has approved and adopted an Amendment to the
Charter One Certificate of Incorporation authorizing the number of directors on
the Charter One Board to be fixed by, or in the manner provided in, the Charter
One Bylaws. The affirmative vote of the holders of 75 percent of the outstanding
shares of Charter One Common Stock is required for adoption of the Amendment.
The adoption of the Merger Agreement is not conditioned upon adoption of the
Amendment and the adoption of the Amendment is not conditioned upon adoption of
the Merger Agreement.

       Article SEVENTH of the Charter One Certificate of Incorporation currently
provides that the number of authorized directors of Charter One shall be not
less than seven nor more than 16 directors. Pursuant to a letter supplementing
the Merger Agreement, upon consummation of the Merger and subject to adoption of
the Amendment by Charter One stockholders, the Charter One Board will expand to
19 members, consisting of the 15 directors of Charter One immediately prior to
the Effective Time and four new directors who have been selected from the RCSB
Board. See "MANAGEMENT AND OPERATIONS AFTER THE MERGER." The Charter One Board
has unanimously adopted the Amendment, which would amend Article SEVENTH to
provide that the number of members of the Charter One Board shall be fixed by,
or in the manner provided in, the Charter One Bylaws. In the event that
stockholders of Charter One do not adopt the Amendment, the Charter One Board
upon consummation of the Merger will consist of 16 members as described under
"MANAGEMENT AND OPERATIONS AFTER THE MERGER." The Charter One Board believes
that the Amendment is in the best interests of Charter One and its stockholders.
Upon adoption of the Amendment by the stockholders, Section A of Article SEVENTH
of the Charter One Certificate of Incorporation will be amended in its entirety
to read as follows:

               SEVENTH: A. BOARD OF DIRECTORS. The business and affairs of the
       Corporation shall be under the direction of a board of directors (the
       "Board of Directors"), except as provided in this Second Restated
       Certificate of Incorporation or in the Bylaws. The number of directors
       shall be determined pursuant to the Corporation's Bylaws, as may be
       amended from time to time.

       Although Charter One does not presently intend to increase the size of
the Charter One Board in the event the Merger does not occur, increased
flexibility of the Charter One Board to fix the number of authorized directors
will provide Charter One with the ability to, among other things, place
additional persons on the Charter One Board if it is prudent to do so in
connection with future acquisitions by Charter One or for other reasons. Such
increases in the Charter One Board would no longer require stockholder approval,
although, as always, directors are still subject to election by stockholders.
Furthermore, this Amendment also gives the Charter One Board the added ability,
by enlarging its board and filling the new directorships created thereby with
its own nominees, to prevent a third party seeking majority representation from
obtaining such representation. The Charter One Certificate of Incorporation
already provides for a classified board which staggers the terms of the classes
of directors thereby lengthening the time necessary to change the composition of
the Charter One Board. Except as otherwise described under "MANAGEMENT AND
OPERATIONS AFTER THE MERGER," the Charter One Board has no present plans,
arrangements, commitments or understandings with respect to increasing or
decreasing the size of the Charter One Board.

       While adoption of the Amendment is not a condition to the Merger, the
Charter One Board believes that the proposed increase in the number of
authorized directors will provide the optimal leadership for Charter One as the
surviving corporation and is in the best interests of Charter One and its
stockholders.

       THE CHARTER ONE BOARD UNANIMOUSLY RECOMMENDS THAT CHARTER ONE
STOCKHOLDERS VOTE FOR THE ADOPTION OF THE AMENDMENT.

                                  LEGAL MATTERS

       The validity of the shares of Charter One Common Stock offered hereby
will be passed upon for Charter One by Silver, Freedman & Taff, L.L.P. (a
limited liability partnership including professional corporations), Washington,
D.C. Certain other legal matters in connection with the Merger will be passed
upon for Charter One by Silver, Freedman & Taff, L.L.P., and for RCSB by Harris
Beach & Wilcox, LLP, Rochester, New York.

                                       72


<PAGE>   85




                                     EXPERTS

       The consolidated financial statements incorporated in this Joint Proxy
Statement/Prospectus by reference from the 1996 Charter One 10-K have been
audited by Deloitte & Touche LLP, independent auditors, as stated in their
report, which is incorporated herein by reference, and have been so incorporated
in reliance upon the report of such firm given upon their authority as experts
in accounting and auditing.

       The consolidated financial statements of RCSB Financial, Inc. and its
subsidiaries as of November 30, 1996 and 1995 and for each of the years in the
three-year period ended November 30, 1996, included in RCSB's 1996 Form 10-K and
incorporated by reference into this Joint Proxy Statement/Prospectus, have been
incorporated by reference herein and in the Registration Statement on Form S-4
of which this Proxy Statement/Prospectus is a part, in reliance upon the report
of KPMG Peat Marwick LLP, independent auditors, included in RCSB's 1996 Form
10-K and incorporated by reference herein, and upon the authority of said firm
as experts in accounting and auditing.

                              STOCKHOLDER PROPOSALS

       As disclosed in the proxy materials for Charter One's 1997 Annual Meeting
of Stockholders, in order to be eligible for inclusion in Charter One's proxy
materials for the 1998 Annual Meeting of Stockholders, any stockholder proposal
to take action at such meeting must be received at the main office of Charter
One, 1215 Superior Avenue, Cleveland, Ohio 44114, no later than November 18,
1997. Any such proposal shall be subject to the requirements of the proxy rules
adopted under the Exchange Act.

       RCSB will hold a 1998 Annual Meeting of Stockholders only if the Merger
is not consummated before the time of such meeting, which is presently expected
to be held in mid-April 1998. In such event, as disclosed in the proxy materials
for RCSB's 1997 Annual Meeting of Stockholders, in order to be eligible for
inclusion in RCSB's proxy materials for the 1998 Annual Meeting of Stockholders,
any stockholder proposal to take action at such meeting must be received at the
main office of RCSB, 235 East Main Street, Rochester, New York 14604, no later
than November 11, 1997. However, if such 1998 Annual Meeting is held after
mid-April 1998, any stockholder proposal must be received by RCSB a reasonable
time before the solicitation of proxies for such Annual Meeting is made. Any
such proposal shall be subject to the requirements of the proxy rules adopted
under the Exchange Act.

                                  OTHER MATTERS

       The Boards of Directors of Charter One and RCSB are not aware of any
business to come before the Special Meetings other than those matters described
above in this Joint Proxy Statement/Prospectus. However, if any other matter
should properly come before the Special Meetings, including proposals to adjourn
a Special Meeting to permit further solicitation of proxies in the event that
there are not sufficient votes to approve any proposal at the time of the
Special Meeting, it is intended that holders of the proxies will act in
accordance with their best judgment; provided, however, that no proxy that is
voted against a proposal will be voted in favor of adjournment to solicit
further proxies for such proposal.

                                       73
<PAGE>   86
                                                                         ANNEX A

                 -----------------------------------------------




                 AGREEMENT AND PLAN OF MERGER AND REORGANIZATION

                                  BY AND AMONG

                           CHARTER ONE FINANCIAL, INC.

                         CHARTER MICHIGAN BANCORP, INC.

                             CHARTER ONE BANK F.S.B.

                              RCSB FINANCIAL, INC.

                                       AND

                        ROCHESTER COMMUNITY SAVINGS BANK

                 -----------------------------------------------





                                ----------------

                                  May 21, 1997

                                ----------------



<PAGE>   87



                                TABLE OF CONTENTS

ARTICLE I

THE MERGER AND RELATED MATTERS

1.1      Merger; Surviving Corporation and Resulting Institution.............A-1
1.2      Effective Time of the Merger........................................A-2
1.3      Company Merger......................................................A-2
1.4      Bank Merger.........................................................A-5
1.5      Closing.............................................................A-6
1.6      Reservation of Right to Revise Transaction..........................A-6



ARTICLE II

REPRESENTATIONS AND WARRANTIES OF COFI AND CHARTER ONE BANK

2.1      Organization........................................................A-6
2.2      Authorization.......................................................A-7
2.3      Conflicts...........................................................A-7
2.4      Anti-takeover Provisions Inapplicable...............................A-7
2.5      Capitalization......................................................A-7
2.6      COFI Financial Statements; Material Changes.........................A-8
2.7      COFI Subsidiaries...................................................A-8
2.8      COFI Filings........................................................A-9
2.9      COFI Reports........................................................A-9
2.10     Compliance with Laws................................................A-9
2.11     Registration Statement; Joint Proxy  Statement.....................A-10
2.12     Litigation.........................................................A-10
2.13     Licenses...........................................................A-10
2.14     Taxes..............................................................A-11
2.15     Insurance..........................................................A-11
2.16     Loans; Investments.................................................A-12
2.17     Allowance for Possible Loan Losses.................................A-12
2.18     COFI Benefit Plans.................................................A-13
2.19     Compliance With Environmental Laws.................................A-14
2.20     Contracts and Commitments..........................................A-15
2.21     Defaults...........................................................A-15
2.22     Operations Since December 31, 1996.................................A-15
2.23     Undisclosed Liabilities............................................A-16
2.24     Assets.............................................................A-16
2.25     Indemnification....................................................A-16
2.26     Insider Interests..................................................A-16
2.27     Brokers and Finders................................................A-17
2.28     Accuracy of Information............................................A-17
2.29     Fairness Opinion...................................................A-17
2.30     Governmental Approvals and Other Conditions........................A-17
2.31     No Ownership in RCSB...............................................A-17

                                       A-i


<PAGE>   88




ARTICLE III

REPRESENTATIONS AND WARRANTIES OF RCSB AND TARGET BANK

3.1      Organization. .....................................................A-17
3.2      Authorization......................................................A-17
3.3      Conflicts..........................................................A-18
3.4      Anti-takeover Provisions Inapplicable..............................A-18
3.5      Capitalization and Stockholders....................................A-18
3.6      RCSB Financial Statements; Material Changes........................A-19
3.7      RCSB Subsidiaries..................................................A-19
3.8      RCSB Filings.......................................................A-20
3.9      RCSB Reports.......................................................A-20
3.10     Compliance With Laws...............................................A-20
3.11     Registration Statement: Joint Proxy Statement......................A-21
3.12     Litigation.........................................................A-21
3.13     Licenses.  ........................................................A-21
3.14     Taxes..............................................................A-21
3.15     Insurance..........................................................A-22
3.16     Loans; Investments.................................................A-22
3.17     Allowance for Possible Loan Losses.................................A-23
3.18     RCSB Benefit Plans.................................................A-24
3.19     Compliance with Environmental Laws.................................A-26
3.20     Contracts and Commitments..........................................A-26
3.21     Defaults...........................................................A-28
3.22     Operations Since November 30, 1996.................................A-28
3.23     Corporate Records..................................................A-30
3.24     Undisclosed Liabilities............................................A-30
3.25     Assets.............................................................A-30
3.26     Indemnification....................................................A-31
3.27     Insider Interests..................................................A-31
3.28     Registration Obligations...........................................A-31
3.29     Regulatory, Tax and Accounting Matters.............................A-31
3.30     Brokers and Finders................................................A-31
3.31     Accuracy of Information............................................A-31
3.32     Fairness Opinion...................................................A-32
3.33     Governmental Approvals and Other Conditions........................A-32



ARTICLE IV

COVENANTS

4.1      Covenants of RCSB and Target Bank..................................A-32
4.2      Mutual Covenants...................................................A-36





                                      A-ii


<PAGE>   89





ARTICLE V

ADDITIONAL AGREEMENTS

5.1      Inspection of Records; Confidentiality.............................A-36
5.2      Registration Statement; Stockholder Approval.......................A-36
5.3      Agreements of Affiliates...........................................A-37
5.4      Expenses...........................................................A-37
5.5      Cooperation........................................................A-37
5.6      Regulatory Applications............................................A-37
5.7      Financial Statements and Reports...................................A-37
5.8      Notice.............................................................A-38
5.9      Press Release......................................................A-38
5.10     Delivery of Supplements to Disclosure Schedules....................A-38
5.11     Litigation Matters.................................................A-38
5.12     Tax Opinion.  .....................................................A-38
5.13     Continuing Employees...............................................A-38
5.14     Reservation of Shares to Satisfy RCSB Stock Options................A-39
5.15     Nasdaq Listing.  ..................................................A-39
5.16     Directors' and Officers' Indemnification Insurance.................A-39
5.17.    Extraordinary COFI Dividend........................................A-39



ARTICLE VI

CONDITIONS

6.1      Conditions to the Obligations of COFI, Charter Michigan
          and Charter One Bank..............................................A-40
6.2      Conditions to the Obligations of RCSB and Target Bank..............A-41
6.3      Conditions to the Obligations of the Parties.......................A-41



ARTICLE VII

TERMINATION; AMENDMENT; WAIVER

7.1      Termination........................................................A-42
7.2      Liabilities and Remedies...........................................A-43
7.3      Survival of Agreements.............................................A-43
7.4      Amendment..........................................................A-43
7.5      Waiver.............................................................A-43






                                      A-iii


<PAGE>   90






 ARTICLE VIII

 GENERAL PROVISIONS

 8.1      Survival..........................................................A-43
 8.2      Notices...........................................................A-44
 8.3      Applicable Law....................................................A-44
 8.4      Headings, Etc.....................................................A-45
 8.5      Severability......................................................A-45
 8.6      Entire Agreement; Binding Effect; Non-Assignment; Counterparts....A-45


 EXHIBIT LIST

 Exhibit A - Form of Voting Agreement *

 Exhibit B - Form of Stock Option Agreement (See Annex D to the Merger 
             Agreement)

 Exhibit C - Directors of Surviving Corporation and Resulting Institution *

 Exhibit D - Home and Other Offices of Resulting Institution *

 Exhibit E - Form of Affiliate Agreement *

 Exhibit F - Form of Harris Beach & Wilcox L.L.P. Legal Opinion *

 Exhibit G - Form of Silver, Freedman & Taff, L.L.P. Legal Opinion *

 -----------------------

 *  Intentionally omitted.

                                       A-iv


<PAGE>   91



                 AGREEMENT AND PLAN OF MERGER AND REORGANIZATION
                 -----------------------------------------------

         THIS AGREEMENT AND PLAN OF MERGER AND REORGANIZATION (this "Agreement")
dated May 21, 1997, is by and among Charter One Financial, Inc., a Delaware
corporation ("COFI"), Charter Michigan Bancorp, Inc., a Michigan corporation and
a wholly owned first-tier subsidiary of COFI ("Charter Michigan"), Charter One
Bank F.S.B., a federally chartered savings bank and a wholly owned subsidiary of
Charter Michigan ("Charter One Bank"), RCSB Financial, Inc., a Delaware
corporation ("RCSB"), and Rochester Community Savings Bank, a New York chartered
savings bank and a wholly owned first-tier subsidiary of RCSB ("Target Bank").

         A. COFI , Charter Michigan, Charter One Bank, RCSB and Target Bank wish
to provide for the terms and conditions of a strategic alliance in which RCSB
will be merged ("Company Merger") with and into Charter Michigan, followed
immediately by the merger of Target Bank with and into Charter One Bank ("Bank
Merger"). The Company Merger and the Bank Merger are collectively referred to
herein as the "Merger."

         B. For federal income tax purposes, it is intended that the Merger
shall qualify as a reorganization within the meaning of Section 368(a) of the
Internal Revenue Code of 1986, as amended ("Code"), and this Agreement shall
constitute a plan of reorganization pursuant to Section 368 of the Code.

         C. For accounting purposes, it is intended that the Merger shall be
accounted for as a pooling of interests.

         D. The parties hereto desire to make certain representations,
warranties, covenants and agreements in connection with the Merger and also to
prescribe various conditions to the Merger.

         E. As a condition to and inducement for COFI, Charter Michigan, and
Charter One Bank to enter into this Agreement, COFI and each of the directors of
RCSB will concurrently with the execution and delivery of this Agreement enter
into voting agreements in the form attached hereto as Exhibit A ("Voting
Agreements") and COFI and RCSB are entering into immediately after the execution
of this Agreement a stock option agreement dated as of the date hereof in the
form attached hereto as Exhibit B ("Stock Option Agreement") pursuant to which
RCSB shall grant to COFI an option to purchase shares of RCSB's common stock.

         Accordingly, and in consideration of the representations, warranties,
covenants, agreements and conditions herein contained, the parties hereto agree
as follows:

                                    ARTICLE I

                         THE MERGER AND RELATED MATTERS

         1.1 MERGER; SURVIVING CORPORATION AND RESULTING INSTITUTION. Subject to
the terms and conditions of this Agreement, and pursuant to the provisions of
the Michigan Business Corporation Act ("MBCA"), the Delaware General Corporation
Law ("DGCL"), the Federal Deposit Insurance Act ("FDIA"), the Home Owners' Loan
Act, as amended ("HOLA") and the rules and regulations promulgated under HOLA
and by the New York State Banking Department ("Thrift Regulations"), (a) at the
Effective Time (as defined in Section 1.2 hereof), RCSB shall be merged with and
into Charter Michigan pursuant to the terms and conditions set forth herein and
(b) thereafter at the Bank Merger Effective Time (as defined in Section 1.2
hereof), Target Bank shall be merged with and into COFI Bank pursuant to the
terms and conditions set forth herein. Upon the consummation of the Company
Merger, the separate corporate existence of RCSB shall cease and Charter
Michigan shall continue as the surviving corporation under the laws of the State
of Michigan. Upon consummation of the Bank Merger, the separate corporate
existence of Target Bank shall cease and Charter One Bank shall continue as the
resulting institution. The name of Charter Michigan as the surviving corporation
of the Company Merger shall remain "Charter Michigan Bancorp, Inc". From and
after the Effective Time, Charter Michigan, as the surviving corporation of the
Company Merger, shall possess all of the properties and rights and be subject to
all of the liabilities and obligations of Charter Michigan and RCSB, all as more
fully described in the MBCA


                                      A-1
<PAGE>   92



and DGCL. The name of Charter One Bank, as the resulting institution of the Bank
Merger, shall remain "Charter One Bank F.S.B.". From and after the Bank Merger
Effective Time, Charter One Bank, as the resulting institution of the Bank
Merger, shall possess all of the properties and rights and be subject to all of
the liabilities and obligations of Charter One Bank and Target Bank (including
any liquidation account of Target Bank established in connection with its
conversion from mutual to stock form), all as more fully described in the Thrift
Regulations.

         1.2 EFFECTIVE TIME OF THE MERGER. As soon as practicable after each of
the conditions set forth in Article VI hereof have been satisfied or waived, the
parties will file, or cause to be filed, with the Secretary of State of
Delaware, the Michigan Department of Commerce, the Office of Thrift Supervision
("OTS") and the New York State Banking Department ("Department") such
certificates of merger, articles of combination and other documents as they may
deem necessary or appropriate for the Company Merger and the Bank Merger, which
certificates of merger, articles of combination and other documents shall in
each case be in the form required by and executed in accordance with the
applicable provisions of the DGCL, MCBA and Thrift Regulations, respectively.
The Company Merger shall become effective at the time the certificate(s) of
merger for such merger are filed with the Secretary of State of Delaware and the
Michigan Department of Commerce ("Effective Time"). The Bank Merger shall become
effective at the time the articles of combination for such merger are endorsed
by the Secretary of the OTS pursuant to the Thrift Regulations ("Bank Merger
Effective Time"). The parties shall cause the Company Merger to become effective
immediately prior to the Bank Merger.

         1.3      COMPANY MERGER.

                  (a) CONVERSION OF RCSB STOCK.  At the Effective Time:

                           (i) Each share of common stock of RCSB, $1.00 par
                  value per share (the "RCSB Common Stock"), issued and
                  outstanding immediately prior thereto shall, by virtue of the
                  Company Merger and without any action of the part of the
                  holder thereof, but subject to Section 1.3(d) hereof, be
                  converted into the right to receive from COFI .91 shares
                  ("Exchange Ratio") of common stock of COFI, par value $.01 per
                  share ("COFI Common Stock"), including the corresponding
                  number of rights associated with the COFI Common Stock
                  pursuant to the Rights Agreement dated November 20, 1989, as
                  amended on May 26, 1995, between COFI and The First National
                  Bank of Boston as Rights Agent. If, subsequent to the date of
                  this Agreement but prior to the Effective Time, the
                  outstanding shares of COFI Common Stock shall, through a
                  reclassification, recapitalization, stock dividend, stock
                  split or reverse stock split have been increased, decreased,
                  changed into or exchanged for a different number or kind of
                  shares or securities, appropriate adjustment will be made to
                  the Exchange Ratio.

                           Notwithstanding any other provision of this
                  Agreement, any shares of RCSB Common Stock issued and
                  outstanding immediately prior to the Effective Time which are
                  then owned beneficially or of record by COFI, Charter
                  Michigan, Charter One Bank, RCSB, Target Bank or by any direct
                  or indirect Subsidiary (as hereinafter defined) of any of them
                  or held in the treasury of RCSB (other than any shares of RCSB
                  Common Stock held (A) directly or indirectly in trust
                  accounts, managed accounts and the like, or otherwise held in
                  a fiduciary capacity, that are beneficially owned by third
                  parties or (B) in respect of a debt previously contracted)
                  shall, by virtue of the Company Merger, be canceled without
                  payment of any consideration therefor and without any
                  conversion thereof.

                           (ii) Each share of Charter Michigan common stock
                  issued and outstanding or held in treasury immediately prior
                  to the Effective Time shall remain issued and outstanding or
                  held in treasury and continue to be an identical issued and
                  outstanding or treasury share of Charter Michigan common stock
                  after the Effective Time.


                                      A-2
<PAGE>   93



                           (iii) The holders of certificates representing shares
                  of RCSB Common Stock shall cease to have any rights as
                  stockholders of RCSB, except such rights, if any, as they may
                  have pursuant to the DGCL. Except as provided above, until
                  certificates representing shares of RCSB Common Stock are
                  surrendered for exchange, the certificates shall, after the
                  Effective Time, represent for all purposes only the right to
                  receive the number of whole shares of COFI Common Stock into
                  which such shares of RCSB Common Stock shall have been
                  converted by the Company Merger as provided above and the
                  right to receive the cash value of any fraction of a share of
                  COFI Common Stock as provided below (collectively, the "Merger
                  Consideration").

                  (b) RESERVATION OF SHARES. Prior to the Effective Time, the
         Board of Directors of COFI shall reserve for issuance a sufficient
         number of shares of COFI Common Stock for the purpose of issuing its
         shares to the stockholders of RCSB in accordance herewith.

                  (c) EXCHANGE OF RCSB COMMON STOCK.

                           (i) As soon as reasonably practicable after the
                  Effective Time, holders of record of certificates formerly
                  representing shares of RCSB Common Stock ("Certificates")
                  shall be instructed to tender such Certificates to COFI, or at
                  the election of COFI, to an independent exchange agent to be
                  selected by COFI (the "Exchange Agent") pursuant to a letter
                  of transmittal that COFI shall deliver or cause to be
                  delivered to such holders. Such letter of transmittal shall
                  specify that delivery shall be effected, and risk of loss and
                  title to Certificates shall pass, only upon acceptance of such
                  Certificates by COFI or the Exchange Agent.

                           (ii) After the Effective Time, each holder of a
                  Certificate that properly surrenders such Certificate to COFI
                  or the Exchange Agent, together with a properly completed
                  letter of transmittal, duly executed, will, upon acceptance
                  thereof by COFI or the Exchange Agent, be entitled to the
                  Merger Consideration payable in respect of the shares
                  represented thereby, and the Certificates so surrendered shall
                  forthwith be cancelled.

                           (iii) COFI or the Exchange Agent shall accept
                  Certificates upon compliance with such reasonable terms and
                  conditions as COFI or the Exchange Agent may impose to effect
                  an orderly exchange thereof in accordance with customary
                  exchange practices. Certificates shall be appropriately
                  endorsed or accompanied by such instruments of transfer as
                  COFI or the Exchange Agent may reasonably require.

                           (iv) Each outstanding Certificate shall until duly
                  surrendered to COFI or the Exchange Agent be deemed to
                  evidence the right to receive the Merger Consideration.

                           (v) After the Effective Time, holders of Certificates
                  shall cease to have rights with respect to the RCSB Common
                  Stock previously represented by such Certificates, and their
                  sole rights shall be to exchange such Certificates for the
                  Merger Consideration. At the Effective Time, RCSB shall
                  deliver a certified copy of a list of its stockholders to COFI
                  or the Exchange Agent. After the Effective Time, there shall
                  be no further transfer on the records of RCSB of Certificates,
                  and if such Certificates are presented to RCSB for transfer,
                  they shall be canceled against delivery of the Merger
                  Consideration. COFI shall not be obligated to deliver the
                  Merger Consideration to any holder of RCSB Common Stock until
                  such holder surrenders the Certificates as provided herein. No
                  dividends declared will be remitted to any person entitled to
                  receive COFI Common Stock under this Agreement until such
                  person surrenders the Certificate representing the right to
                  receive such COFI Common Stock, at which time such dividends
                  on whole shares of COFI Common Stock with a record date on or
                  after the Effective Time shall be remitted to such person,
                  without interest and less any taxes that may have been imposed
                  thereon. Certificates surrendered for exchange by any person
                  constituting


                                      A-3
<PAGE>   94



                  an "affiliate" of RCSB for purposes of Rule 145 under the
                  Securities Act of 1933 and the rules and regulations
                  thereunder (the "Securities Act") shall not be exchanged for
                  certificates representing COFI Common Stock until COFI has
                  received a written agreement from such person as specified in
                  Section 5.3. Neither the Exchange Agent nor any party to this
                  Agreement nor any affiliate thereof shall be liable to any
                  holder of RCSB Common Stock represented by any Certificate for
                  any consideration paid to a public official pursuant to
                  applicable abandoned property, escheat or similar laws. COFI
                  and the Exchange Agent shall be entitled to rely upon the
                  stock transfer books of RCSB to establish the identity of
                  those persons entitled to receive consideration specified in
                  this Agreement, which books shall be conclusive with respect
                  thereto. In the event of a dispute with respect to ownership
                  of stock represented by any Certificate, COFI or the Exchange
                  Agent shall be entitled to deposit any consideration in
                  respect thereof in escrow with an independent third party and
                  thereafter be relieved with respect to any claims thereto.

                           (vi) If the Merger Consideration is to be issued to a
                  person other than a person in whose name a surrendered
                  Certificate is registered, it shall be a condition of issuance
                  that the surrendered Certificate shall be properly endorsed or
                  otherwise in proper form for transfer and that the person
                  requesting such issuance shall pay to COFI or the Exchange
                  Agent in advance any required transfer or other taxes or
                  establish to the satisfaction of COFI or the Exchange Agent
                  that such tax has been paid or is not applicable.

                           (vii) In the event any Certificate shall have been
                  lost, stolen or destroyed, the owner of such lost, stolen or
                  destroyed Certificate shall deliver to COFI or the Exchange
                  Agent an affidavit stating such fact, in form satisfactory to
                  COFI, and, at COFI's discretion, a bond in such reasonable sum
                  as COFI or the Exchange Agent may direct as indemnity against
                  any claim that may be made against COFI or RCSB or its
                  successor or any other party with respect to the Certificate
                  alleged to have been lost, stolen or destroyed. Upon such
                  delivery, the owner shall have the right to receive the Merger
                  Consideration with respect to the shares represented by the
                  lost, stolen or destroyed Certificate.

                  (d) NO FRACTIONAL SHARES. Notwithstanding any other provision
         of this Agreement, neither certificates nor scrip for fractional shares
         of COFI Common Stock shall be issued in the Company Merger. Each holder
         who otherwise would have been entitled to a fraction of a share of COFI
         Common Stock (after taking into account all Certificates delivered by
         such holder) shall receive in lieu thereof cash (without interest) in
         an amount determined by multiplying the fractional share interest to
         which such holder would otherwise be entitled by the COFI Share Price
         on the last trading day preceding the Effective Time. The "COFI Share
         Price" shall mean the closing sale price (rounded down to the nearest
         cent) of one share of COFI Common Stock as reported on the Nasdaq
         National Market. No such holder shall be entitled to dividends, voting
         rights or any other rights in respect of any fractional share interest.

                  (e) STOCK OPTIONS. The Target Bank 1986 Stock Option Plan
         ("1986 Option Plan") and the Target Bank 1992 Stock-Based Compensation
         Plan ("1992 Option Plan") and each option granted thereunder
         outstanding on the date hereof (together with mandatory grants required
         to be made to non-employee directors on May 28, 1997 under the 1992
         Option Plan) and remaining outstanding immediately prior to the
         Effective Time shall, at the Effective Time, be assumed by COFI and
         each such option shall continue to be outstanding, but shall represent
         an option to purchase shares of COFI Common Stock in an amount and at
         an exercise price determined as provided below (and otherwise subject
         to the terms of the 1986 Option Plan or 1992 Option Plan, whichever is
         applicable):

                           (i) the number of shares of COFI Common Stock to be
                  subject to the continuing option shall be equal to the product
                  of the number of shares of RCSB Common Stock subject to the
                  original


                                      A-4
<PAGE>   95



                  option and the Exchange Ratio, provided that any fractional
                  share of COFI Common Stock resulting from such multiplication
                  shall be rounded down to the nearest share; and

                           (ii) the exercise price per share of COFI Common
                  Stock under the continuing option shall be equal to the
                  exercise price per share of RCSB Common Stock under the
                  original option divided by the Exchange Ratio, provided that
                  such exercise price shall be rounded down to the nearest cent.

                  It is intended that the foregoing assumption shall be
         undertaken consistent with and in a manner that will not constitute a
         "modification" under Section 424 of the Code as to any option which is
         an "incentive stock option".

                  (f) ARTICLES OF INCORPORATION AND BYLAWS OF THE SURVIVING
         CORPORATION. The Articles of Incorporation and Bylaws of Charter
         Michigan, as in effect immediately prior to the Effective Time, shall
         be the Articles of Incorporation and Bylaws of Charter Michigan, as the
         surviving corporation of the Company Merger, until either is thereafter
         amended in accordance with applicable law.

                  (g) DIRECTORS AND OFFICERS OF THE SURVIVING CORPORATION. The
         directors of Charter Michigan as the surviving corporation of the
         Company Merger shall be those persons listed on Exhibit C to this
         Agreement. Such directors shall continue in office until their
         successors shall be duly elected and qualified or otherwise duly
         selected. The officers of Charter Michigan immediately prior to the
         Effective Time shall be the officers of Charter Michigan, as the
         surviving corporation of the Company Merger, until their successors
         shall be duly elected and qualified or otherwise duly selected.

                  (h) SERVICE OF PROCESS. At the Effective Time Charter
         Michigan, as the surviving corporation of the Company Merger, consents
         to be sued and served with process in the State of Delaware and
         irrevocably appoints the Secretary of State of Delaware as its agent to
         accept service of process in any proceeding in the State of Delaware to
         enforce against it any obligation of RCSB.

                  (i) PRINCIPAL OFFICE. The location of the principal office of
         Charter Michigan, as the surviving corporation of the Company Merger,
         in the State of Michigan is 13606 Michigan Avenue, 2nd Floor, Dearborn,
         Michigan 48126.

         1.4 BANK MERGER.

                  (a) CANCELLATION OF TARGET BANK COMMON STOCK. At the Bank
         Merger Effective Time, each share of common stock of Target Bank
         ("Target Bank Common Stock") issued and outstanding immediately prior
         thereto shall, by virtue of the Bank Merger, be canceled. No new shares
         of capital stock or other securities or obligations of Charter One Bank
         shall be issued with respect to or in exchange for such canceled
         shares, and such canceled shares of Target Bank Common Stock shall not
         be converted into capital stock or other securities or obligations of
         Charter One Bank.

                  (b) CHARTER AND BYLAWS OF THE RESULTING INSTITUTION. The
         charter and bylaws of Charter One Bank, as in effect immediately prior
         to the Bank Merger Effective Time, shall, without any change, be the
         charter and bylaws of Charter One Bank, as the resulting institution of
         the Bank Merger, until either is thereafter amended in accordance with
         applicable law.

                  (c) DIRECTORS OF THE RESULTING INSTITUTION. The directors of
         Charter One Bank, as the resulting institution of the Bank Merger,
         shall be those persons listed in Exhibit C to this Agreement. Such
         directors shall continue in office until their successors are duly
         elected and qualified or otherwise duly selected.


                                      A-5
<PAGE>   96



                  (d) OFFICES OF THE RESULTING INSTITUTION. The home and other
offices of Charter One Bank, as the resulting institution of the Bank Merger,
shall be as listed in Exhibit D to this Agreement.

         1.5 CLOSING. Subject to the provisions of Article VI hereof, the
closing of the transactions contemplated by this Agreement (the "Closing") shall
take place as soon as practicable after satisfaction or waiver of all of the
conditions to Closing, and shall be at 10:00 a.m. on the first business day of
the first calendar month following the satisfaction of all of the conditions to
Closing, at the executive offices of COFI or at such other date, time and
location as is mutually agreed to by COFI and RCSB, but in no event prior to
September 1, 1997. The date on which the Closing actually occurs is herein
referred to as the "Closing Date".

         1.6 RESERVATION OF RIGHT TO REVISE TRANSACTION. COFI shall have the
right to change the method of effecting the Merger in a manner reasonably
acceptable to RCSB (including without limitation the provisions of this Article
I), to the extent permitted by applicable law and to the extent it deems such
change to be desirable, provided, however, that no such change shall (a) alter
or change the amount or kind of the Merger Consideration or the treatment of
stock options as set forth in Section 1.3(e) hereof, (b) diminish the benefits
to be received by the directors, officers or employees of RCSB and Target Bank
as set forth in this Agreement or in any other agreements between the parties
made in connection with this Agreement, (c) materially impede or delay the
consummation of the Company Merger (d) adversely affect the tax treatment of
RCSB stockholders as a result of receiving the Merger Consideration or (e)
result in any representation or warranty of any party set forth in this
Agreement becoming incorrect in any material respect. COFI may exercise this
right of revision by giving written notice thereof in the manner provided in
Section 8.2 of this Agreement.

                                   ARTICLE II

           REPRESENTATIONS AND WARRANTIES OF COFI AND CHARTER ONE BANK

         COFI and Charter One Bank jointly and severally represent and warrant
to RCSB and Target Bank that:

         2.1 ORGANIZATION.

                  (a) COFI is a corporation duly organized, validly existing and
         in good standing under the laws of the State of Delaware and has all
         requisite power and authority, corporate and otherwise, to own, operate
         and lease its assets and properties and to carry on its business
         substantially as it is now being conducted. COFI is duly licensed or
         qualified to do business and is in good standing in each jurisdiction
         where the character of the assets or properties owned or leased by it
         or the nature of the business transacted by it requires that it be so
         licensed or qualified, except where the failure to be so licensed or
         qualified would not have a Material Adverse Effect (as defined in
         Section 2.1(b) hereof)) on COFI or its ability to consummate the
         transactions contemplated herein. COFI has all requisite corporate
         power and authority to enter into this Agreement and, subject to the
         approval of this Agreement and the Company Merger by its stockholders
         and the receipt of all requisite regulatory approvals and the
         expiration of applicable waiting periods, to consummate the Merger.
         COFI is duly registered as a savings and loan holding company under
         HOLA.

                  (b) As used in this Agreement, the term "Material Adverse
         Effect" with respect to COFI or RCSB means any condition, event, change
         or occurrence that has or may reasonably be expected to have a material
         adverse effect on the condition (financial or otherwise), properties,
         business, operations, results of operations, assets or deposit
         liabilities of such entity on a consolidated basis; it being understood
         that a Material Adverse Effect shall not include: (i) a change with
         respect to, or effect on, such entity and its Subsidiaries resulting
         from a change in law, rule, regulation, generally accepted accounting
         principles or regulatory accounting principles, as such would apply to
         the financial statements of such entity on a consolidated basis; (ii) a
         change with respect to, or effect on, such entity and its Subsidiaries
         resulting from expenses (such as legal, accounting and investment
         bankers' fees) incurred in connection with this Agreement; (iii) a
         change with


                                      A-6
<PAGE>   97



         respect to, or effect on, such entity and its Subsidiaries resulting
         from any other matter affecting depository institutions generally
         including, without limitation, changes in general economic conditions
         and changes in prevailing interest and deposit rates; or (iv) in the
         case of RCSB, any financial change resulting from adjustments taken
         pursuant to Section 4.1(h) hereof.

         2.2 AUTHORIZATION. The execution, delivery and performance of this
Agreement and the consummation of the transactions contemplated hereby have been
duly approved and authorized by the Boards of Directors of COFI, Charter
Michigan and Charter One Bank, and all necessary corporate action on their part
has been taken, subject to the approval of this Agreement and the Company Merger
by the holders of a majority of the issued and outstanding COFI Common Stock.
This Agreement has been duly executed and delivered by COFI, Charter Michigan
and Charter One Bank and constitutes the valid and binding obligation of each of
them and is enforceable against each of them, except to the extent that
enforceability thereof may be limited by applicable bankruptcy, insolvency,
reorganization, moratorium or similar laws or equitable principles and
doctrines.

         2.3 CONFLICTS. Subject to the second sentence of this Section 2.3, the
execution and delivery of this Agreement does not, and the consummation of the
transactions contemplated hereby will not, conflict with or result in any
violation, breach or termination of, or default or loss of a material benefit
under, or permit the acceleration of any obligation under, or result in the
creation of any material lien, charge or encumbrance on any of the property or
assets under, any provision of the Certificate of Incorporation or Bylaws of
COFI or similar documents of any COFI Subsidiary or any mortgage, indenture,
lease, agreement or other instrument, permit, concession, grant, franchise,
license, judgment, order, decree, statute, law, ordinance, rule or regulation
applicable to COFI or any COFI Subsidiary or their respective properties, other
than any such conflicts, violations or defaults which (i) will be cured or
waived prior to the Effective Time; (ii) are not material to the conduct of
business or operations of COFI or any COFI Subsidiary; or (iii) are disclosed in
Section 2.3 of that certain confidential writing delivered by COFI to RCSB
within two business days prior to the date hereof (the "COFI Disclosure
Schedule"). No consent, approval, order or authorization of, or registration,
declaration or filing with, any federal or state governmental authority is
required by or with respect to COFI, Charter Michigan or Charter One Bank, in
connection with the execution and delivery of this Agreement or the consummation
by them of the transactions contemplated hereby except for: (a) the filing of
all applicable regulatory applications by COFI, RCSB and/or their respective
Subsidiaries for approval of the transactions contemplated by this Agreement;
(b) the filing by COFI of the registration statement relating to the COFI Common
Stock to be issued pursuant to this Agreement ("Registration Statement") with
the United States Securities and Exchange Commission ("SEC") and various blue
sky authorities, which Registration Statement shall include the prospectus/proxy
statement ("Joint Proxy Statement") for use in connection with the meetings of
COFI's and RCSB's stockholders to vote on this Agreement and the Company Merger;
(c) the filing of one or more certificates of merger with respect to the Company
Merger with the Secretary of State of Delaware and the Michigan Department of
Commerce; (d) the filing of the articles of combination with the OTS and the
Department relating to the Bank Merger; (e) any filings, approvals or no-action
letters with or from state securities authorities; and (f) any anti-trust
filings, consents, waivers or approvals.

         2.4 ANTI-TAKEOVER PROVISIONS INAPPLICABLE. No "business combination,"
"moratorium," "control share" or other state anti-takeover statute or regulation
(i) prohibits or restricts the ability of COFI or Charter Michigan to perform
its obligations under this Agreement or its ability to consummate the
transactions contemplated hereby, (ii) would have the effect of invalidating or
voiding this Agreement or any provision hereof, or (iii) would subject RCSB to
any material impediment or condition in connection with the exercise of any of
its rights under this Agreement.

         2.5 CAPITALIZATION.

                  (a) As of the date hereof, the authorized capital stock of
         COFI consists of (i) 180,000,000 shares of COFI Common Stock, $0.01 par
         value per share, of which, as of February 28, 1997, 46,330,703 shares
         were issued and outstanding and (ii) 20,000,000 shares of preferred
         stock, $0.01 par value per share, of which none are issued and
         outstanding. All of the issued and outstanding shares of COFI Common
         Stock have been, and all of the shares of COFI Common Stock to be
         issued in the Company Merger will be, at the Effective Time,


                                      A-7
<PAGE>   98



         duly and validly authorized and issued, and are or will be, as the case
         may be, fully paid and non-assessable. None of the outstanding shares
         of COFI Common Stock has been issued in violation of any preemptive
         rights of the current or past stockholders of COFI and none of the
         outstanding shares of COFI Common Stock is or will be entitled to any
         preemptive rights in respect of the Company Merger or any of the other
         transactions contemplated by this Agreement.

                  (b) As of April 30, 1997, COFI does not have outstanding any
         securities or rights convertible into or exchangeable for COFI Common
         Stock or any commitments, contracts, understandings or arrangements by
         which COFI is or may be bound to issue additional shares of COFI Common
         Stock, except pursuant to an Agreement and Plan of Merger and
         Reorganization with Haverfield Corporation and Home Bank, F.S.B. dated
         April 22, 1997 ("Haverfield Definitive Agreement"), employee and
         director stock options or as otherwise set forth in Section 2.5 of the
         COFI Disclosure Schedule.

         2.6 COFI FINANCIAL STATEMENTS; MATERIAL CHANGES. COFI has heretofore
delivered to RCSB its audited consolidated financial statements for calendar
years ended December 31, 1996 and December 31, 1995 (together the "COFI
Financial Statements"). The COFI Financial Statements (x) are true and correct
in all material respects; (y) have been prepared in accordance with generally
accepted accounting principles applied on a consistent basis during the periods
involved (except as may be indicated in the notes thereto); and (z) fairly
present the consolidated financial position of COFI as of the dates thereof and
the consolidated results of its operations, shareholders' equity, cash flows and
changes in financial position for the periods then ended. Since December 31,
1996 to the date hereof, COFI and the COFI Subsidiaries have not undergone or
suffered any changes in their respective condition (financial or otherwise),
properties, business or operations which have been, in any case or in the
aggregate, materially adverse to COFI on a consolidated basis except as
disclosed in Section 2.6 of the COFI Disclosure Schedule. No facts or
circumstances have been discovered from which it reasonably appears that there
is a significant risk and reasonable probability that COFI will suffer or
experience a Material Adverse Effect.

         2.7 COFI SUBSIDIARIES.

                  (a) All of the COFI Subsidiaries as of the date of this
         Agreement are listed in Section 2.7 of the COFI Disclosure Schedule.
         COFI owns directly or indirectly all of the issued and outstanding
         shares of capital stock of the COFI Subsidiaries. No capital stock of
         any of the COFI Subsidiaries is, or may become required to be, issued
         (other than to COFI or another COFI Subsidiary) by reason of any
         options, warrants, scrip, right to subscribe to, calls, or commitments
         of any character whatsoever relating to, or securities or rights
         convertible into or exchangeable for, shares of the capital stock of
         any COFI Subsidiary. All of the shares of capital stock of each COFI
         Subsidiary held by COFI or a COFI Subsidiary are fully paid and
         non-assessable and are owned free and clear of any claim, lien or
         encumbrance, except as disclosed in Section 2.7 of the COFI Disclosure
         Schedule.

                  (b) Each COFI Subsidiary is either a savings bank or a
         corporation and is duly organized, validly existing and in good
         standing under the laws of the jurisdiction in which it is incorporated
         or organized, and is duly licensed or qualified to do business and is
         in good standing in each jurisdiction where the character of the assets
         or properties owned or leased by it or the nature of the business
         transacted by it requires it to be so licensed or qualified, except
         where the failure to be so licensed or qualified, either individually
         or in the aggregate, would not have a Material Adverse Effect on COFI
         or the ability of Charter Michigan or Charter One Bank to consummate
         the transactions contemplated herein. Each COFI Subsidiary has the
         corporate power and authority necessary for it to own, operate or lease
         its assets and properties and to carry on its business as it has been
         and is now being conducted.

                  (c) For purposes of this Agreement, an "COFI Subsidiary" or a
         "Subsidiary" of COFI shall mean each corporation, savings bank and
         other entity in which COFI owns or controls directly or indirectly 10%
         or more of the outstanding equity securities; provided, however, there
         shall not be included any such entity


                                      A-8
<PAGE>   99


         acquired in good faith through foreclosure, or any such entity to the
         extent that the equity securities of such entity are owned or
         controlled in a bona fide fiduciary capacity.

                  (d) Charter One Bank is a member in good standing of the
         Federal Home Loan Bank System. All eligible deposit accounts issued by
         Charter One Bank are insured by the Federal Deposit Insurance
         Corporation ("FDIC") through the Savings Association Insurance Fund
         ("SAIF") to the full extent permitted under applicable law. Charter One
         Bank is, and at all times since June 1, 1990 has been, a "domestic
         building and loan association" as defined in Section 7701(a)(19) of the
         Code and a "qualified thrift lender" as defined in Section 10(m) of
         HOLA.

         2.8 COFI FILINGS. COFI has previously made available, or will make
available prior to the Effective Time, to RCSB true and correct copies of its
(i) proxy statements relating to all meetings of its stockholders (whether
special or annual) during calendar years 1995, 1996, and 1997 and (ii) all other
reports, as amended, or filings, as amended, required to be filed under the
Securities Exchange Act of 1934, as amended (the "Exchange Act") by COFI with
the SEC since January 1, 1995, including without limitation on Forms 10-K, 10-Q
and 8-K.

         2.9 COFI REPORTS. Each of COFI and the COFI Subsidiaries has filed, and
will continue to file, all material reports and statements, together with any
amendment required to be made with respect thereto, that it was, or will be
required to file with the SEC, the FDIC, the OTS, the National Association of
Securities Dealers, Inc. ("NASD") and other applicable thrift, securities and
other regulatory authorities (except filings which are not material). As of
their respective dates (and without giving effect to any amendments or
modifications filed after the date of this Agreement with respect to reports and
documents filed before the date of this Agreement), each of such reports and
documents, including the financial statements, exhibits, and schedules thereto,
complied in all material respects with all of the statutes, rules and
regulations enforced or promulgated by the authority with which they were filed
and did not contain any untrue statement of a material fact or omit to state any
material fact necessary in order to make the statements made therein, in light
of the circumstances under which they were made, not misleading. Other than
normal examinations conducted by the Internal Revenue Service, state and local
taxing authorities, the OTS or the FDIC in the regular course of the business of
COFI or the COFI Subsidiaries, no federal, state or local governmental agency,
commission or other entity has initiated any proceeding or, to the best
knowledge of COFI and Charter One Bank, investigation into the business or
operations of COFI or the COFI Subsidiaries within the past two years except as
set forth in Section 2.9 of the COFI Disclosure Schedule. There is no unresolved
violation, criticism or exception by the SEC, OTS, FDIC or other agency,
commission or entity with respect to any report or statement referred to herein
that is material to COFI or any COFI Subsidiary.

         2.10 COMPLIANCE WITH LAWS.

                  (a) Except as disclosed in Section 2.10 of the COFI Disclosure
         Schedule, the businesses of COFI and the COFI Subsidiaries are not
         being conducted in violation of any law, ordinance or regulation of any
         governmental entity, including, without limitation, any laws affecting
         financial institutions (including those pertaining to the Bank Secrecy
         Act, the investment of funds, the lending of money, the collection of
         interest and the extension of credit), federal and state securities
         laws, laws and regulations relating to financial statements and
         reports, truth-in-lending, truth-in-savings, usury, fair credit
         reporting, consumer protection, occupational safety, fair employment
         practices, fair labor standards and laws and regulations relating to
         employees and employee benefits, and any statutes or ordinances
         relating to the properties occupied or used by COFI or any COFI
         Subsidiary, except for possible violations which either singly or in
         the aggregate do not and, insofar as reasonably can be foreseen in the
         future, will not have a Material Adverse Effect on COFI.

                  (b) Except as disclosed in Section 2.10 of the COFI Disclosure
         Schedule, no investigation or review by any governmental entity with
         respect to COFI or any COFI Subsidiary is pending or, to the best
         knowledge of COFI and Charter One Bank, threatened, nor has any
         governmental entity indicated to COFI or


                                      A-9
<PAGE>   100


         any COFI Subsidiary an intention to conduct the same, other than normal
         or routine regulatory examinations and those the outcome of which will
         not have a Material Adverse Effect on COFI.

                  (c) COFI and each of the COFI Subsidiaries, where applicable,
         is in substantial compliance with the applicable provisions of the
         Community Reinvestment Act of 1977 and the regulations promulgated
         thereunder. As of the date of this Agreement, neither COFI nor Charter
         One Bank has been advised of the existence of any fact or circumstance
         or set of facts or circumstances which, if true, would cause COFI or
         any of the COFI Subsidiaries to fail to be in substantial compliance
         with such provisions. No COFI Subsidiary that is a financial
         institution has received a rating from an applicable regulatory
         authority which is less than "satisfactory."

         2.11 REGISTRATION STATEMENT; JOINT PROXY STATEMENT. The information to
be supplied by COFI for inclusion in the Registration Statement will not, at the
time the Registration Statement is declared effective and at the Effective Time,
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary in order to make the statements
therein, in the light of the circumstances under which they were made, not
misleading. The information to be supplied by COFI for inclusion in the Joint
Proxy Statement will not, on the date the Joint Proxy Statement (or any
amendment thereof or supplement thereto) is first mailed to stockholders of COFI
or RCSB, or at the time of their respective meetings of stockholders to vote on
this Agreement and the Company Merger, and at the Effective Time, contain any
statement that, in light of the circumstances under which it is made, is false
or misleading with respect to any material fact, omits to state any material
fact necessary in order to make the statements made therein not false or
misleading, or omits to state any material fact necessary to correct any
statement in any earlier communication with respect to the solicitation of
proxies for such meetings of stockholders that has become false or misleading.
If, at any time prior to the Effective Time, any event relating to COFI or any
of its affiliates, officers or directors is discovered by COFI that should be
set forth in an amendment to the Registration Statement or a supplement to the
Joint Proxy Statement, COFI will promptly inform RCSB and such amendment or
supplement will be promptly filed with the SEC and, as required by law,
disseminated to the stockholders of COFI and RCSB. Notwithstanding the
foregoing, COFI makes no representation or warranty with respect to any
information supplied by RCSB that is contained in any of the Registration
Statement or the Joint Proxy Statement. The Joint Proxy Statement and the
Registration Statement will (with respect to COFI) comply in all material
respects as to form and substance with the requirements of the Exchange Act, the
Securities Act, and the rules and regulations thereunder.

         2.12 LITIGATION. Except as disclosed in Section 2.12 of the COFI
Disclosure Schedule, there is no suit, action, investigation or proceeding,
legal, quasi-judicial, administrative or otherwise, pending or, to the best
knowledge of COFI and Charter One Bank threatened, against or affecting COFI or
any COFI Subsidiary, or any of their respective officers, directors, employees
or agents, in their capacities as such, which if adversely determined, would
have a Material Adverse Effect on COFI or which would materially affect the
ability of COFI, Charter Michigan or Charter One Bank to consummate the
transactions contemplated herein or which is seeking to enjoin consummation of
the transactions provided for herein or to obtain other relief in connection
with this Agreement or the transactions contemplated hereby, nor is there any
judgment, decree, injunction, rule or order of any court, governmental
department, commission agency, instrumentality or arbitrator outstanding against
COFI or any COFI Subsidiary or any of their respective officers, directors,
employees or agents, in their capacities as such, having, or which, insofar as
reasonably can be foreseen in the future, would have any such effect.

         2.13 LICENSES. COFI and the COFI Subsidiaries hold all licenses,
certificates, permits, franchises and all patents, trademarks, service marks,
trade names, copyrights or rights thereto, and required authorizations,
approvals, consents, licenses, clearances and orders or registrations with all
appropriate federal, state or other authorities that are material to the conduct
of their respective businesses as now conducted and as presently proposed to be
conducted.


                                      A-10
<PAGE>   101



         2.14 TAXES.

                  (a) Except as disclosed in Section 2.14 of the COFI Disclosure
         Schedule, COFI and the COFI Subsidiaries have each timely filed all tax
and information returns required to be filed and have paid (or COFI
has paid on behalf of its Subsidiaries), or have accrued on their respective
books and set up an adequate reserve for the payment of, all taxes reflected on
such returns or required to be paid in respect of the periods covered by such
returns and have accrued on their respective books and set up an adequate
reserve for the payment of all income and other taxes anticipated to be payable
in respect of periods through the end of the calendar month next preceding the
date hereof. Neither COFI nor any COFI Subsidiary is delinquent in the payment
of any tax, assessment or governmental charge. No deficiencies for any taxes
have been proposed, asserted or assessed against COFI or any COFI Subsidiary
that have not been resolved or settled, and no requests for waivers of the time
to assess any such tax are pending or have been agreed to. Except as set forth
in Section 2.14 of the COFI Disclosure Schedule, neither COFI nor any COFI
Subsidiary is currently subject to audit or examination of any of its income tax
returns by the Internal Revenue Service or any state, municipal or other taxing
authority. Neither COFI nor any COFI Subsidiary is a party to any action or
proceeding by any governmental authority for the assessment or the collection of
taxes. Deferred taxes of COFI and the COFI Subsidiaries have been accounted for
in accordance with generally accepted accounting principles.

                  (b) COFI has not filed any consolidated federal income tax
         return with an "affiliated group" (within the meaning of Section 1504
         of the Code), where COFI was not the common parent of the group.
         Neither COFI nor any COFI Subsidiary is, or has been, a party to any
         tax allocation agreement or arrangement pursuant to which it has any
         contingent or outstanding liability to anyone other than COFI or a COFI
         Subsidiary.

                  (c) COFI and the COFI Subsidiaries have each withheld amounts
         from its employees, stockholders or holders of public deposit accounts
         in compliance with the tax withholding provisions of applicable
         federal, state and local laws, have filed all federal, state and local
         returns and reports for all periods for which such returns or reports
         would be due with respect to income tax withholding, social security,
         unemployment taxes, income and other taxes and all payments or deposits
         with respect to such taxes have been timely made and, except as set
         forth in Section 2.14 of the COFI Disclosure Schedule, have notified
         all employees, stockholders, and holders of public deposit accounts of
         their obligations to file all forms, statements and reports with it in
         accordance with applicable federal, state and local tax laws and have
         taken reasonable steps to insure that such employees, stockholders and
         holders of public deposit accounts have filed all such forms,
         statements and reports with it.

                  (d) For the purposes of this Agreement, the terms "tax" and
         "taxes" include, without limitation, any federal, state, local or
         foreign income, leasing, franchise, excise, gross receipts, sales, use,
         occupational, employment, real property, ad valorem, tangible and
         intangible personal property and state taxes, payments in lieu of
         taxes, levies, duties, imposts, business, operations or financial
         condition, assessments, fees, charges and withholdings of any nature
         whatsoever, together with any related penalties, fines, additions to
         tax or interest thereon.

         2.15 INSURANCe. COFI and the COFI Subsidiaries maintain insurance with
insurers which in the best judgment of management of COFI are sound and
reputable on their respective assets and upon their respective businesses and
operations against loss or damage, risks, hazards and liabilities as in their
judgment they deem appropriate. COFI and the COFI Subsidiaries maintain in
effect all insurance required to be carried by law or by any agreement by which
they are bound. All material claims under all policies of insurance maintained
by COFI and the COFI Subsidiaries have been filed in due and timely fashion.


                                      A-11
<PAGE>   102



         2.16 LOANS; INVESTMENTS.

                  (a) Except as otherwise disclosed in Section 2.16 of the COFI
         Disclosure Schedule, each material loan reflected as an asset on the
         COFI Financial Statements dated as of December 31, 1996 is evidenced by
         appropriate and sufficient documentation and constitutes, to the best
         knowledge of COFI and Charter One Bank, the legal, valid and binding
         obligation of the obligor named therein, enforceable in accordance with
         its terms, except to the extent that the enforceability thereof may be
         limited by bankruptcy, insolvency, reorganization, moratorium or
         similar laws or equitable principles or doctrines. Except as set forth
         in Section 2.16 of the COFI Disclosure Schedule, all such loans are,
         and at the Effective Time will be, free and clear of any security
         interest, lien, encumbrance or other charge.

                  (b) All guarantees of indebtedness owed to COFI or any COFI
         Subsidiary, including but not limited to those of the Federal Housing
         Administration, the Small Business Administration, and other state and
         federal agencies, are, to the best knowledge of COFI and Charter One
         Bank, valid and enforceable, except to the extent enforceability
         thereof may be limited by applicable bankruptcy, insolvency,
         reorganization, moratorium or similar laws or equitable principles or
         doctrines and except as would not have a Material Adverse Effect on
         COFI.

                  (c) All interest rate swaps, caps, floors and option
         agreements and other interest rate risk management arrangements to
         which COFI or any COFI Subsidiary is a party or by which any of their
         properties or assets may be bound were entered into in the ordinary
         course of business and, to the best knowledge of COFI and Charter One
         Bank, in accordance with then-customary practice and applicable rules,
         regulations and policies of thrift regulatory authorities and with
         counterparties believed to be financially responsible at the time and
         are legal, valid and binding obligations and are in full force and
         effect. COFI and the COFI Subsidiaries have duly performed in all
         material respects all of their respective obligations thereunder to the
         extent that such obligations to perform have accrued, and to the best
         knowledge of COFI and Charter One Bank, there are no material breaches,
         violations or defaults or allegations or assertions of such by any
         party thereunder. None of the transactions contemplated by this
         Agreement would permit (i) a counterparty under any interest rate swap,
         cap, floor and option agreement or any other interest rate risk
         management agreement or (ii) any party to any mortgage backed security
         financing arrangement, to accelerate, discontinue, terminate, or
         otherwise modify any such agreement or arrangement or would require
         COFI or any COFI Subsidiary to recognize any gain or loss with respect
         to such arrangement.

                  (d) Except as set forth in Section 2.16 of the COFI Disclosure
         Schedule and except for pledges to secure public and trust deposits,
         none of the investments reflected in the COFI Financial Statements
         dated as of December 31, 1996 under the heading "Investment
         Securities," and none of the investments made by COFI and the COFI
         Subsidiaries since December 31, 1996, is subject to any restriction,
         whether contractual or statutory, which materially impairs the ability
         of COFI or any COFI Subsidiary to freely dispose of such investment at
         any time, other than those restrictions imposed on securities held for
         investment under generally accepted accounting principles. With respect
         to all material repurchase agreements to which COFI or any COFI
         Subsidiary is a party, COFI or such Subsidiary has a valid, perfected
         first lien, or security interest in the government securities or other
         collateral securing each such repurchase agreement, and the value of
         the collateral securing each such repurchase agreement equals or
         exceeds the amount of the debt secured by such collateral under such
         agreement.

         2.17 ALLOWANCE FOR POSSIBLE LOAN LOSSES. The allowance for possible
loan losses shown on the COFI Financial Statements as of December 31, 1996, (and
as shown on any financial statements to be delivered by COFI to RCSB pursuant to
Section 5.7 hereof), to the best knowledge of COFI and Charter One Bank, as of
such date was (and will be as of such subsequent financial statement dates)
adequate in all respects to provide for possible or specific losses, net of
recoveries relating to loans previously charged off, on loans outstanding, and
contained (or will contain) an additional amount of unallocated reserves for
unanticipated future losses at a level considered adequate under the


                                      A-12
<PAGE>   103



standards applied by applicable federal regulatory authorities and based upon
generally accepted accounting principles applicable to Charter One Bank. To the
best knowledge of COFI and Charter One Bank, the aggregate principal amount of
loans contained (or that will be contained) in the loan portfolio of COFI and
the COFI Subsidiaries as of December 31, 1996 (and as of the dates of any
financial statements to be delivered by COFI to RCSB pursuant to Section 5.7
hereof), in excess of such reserve, was (and will be) fully collectible.

         2.18 COFI BENEFIT PLANS.

                  (a) The term "COFI Benefit Plans" as used herein refers to
         each compensation, consulting, employment, termination or collective
         bargaining agreement, and each stock option, stock purchase, stock
         appreciation right, life, health, accident or other insurance, bonus,
         deferred or incentive compensation, severance or separation agreement
         or any agreement providing any payment or benefit resulting from a
         change in control, profit sharing, retirement, or other employee
         benefit plan, practice, policy or arrangement of any kind, oral or
         written, covering any employee, former employee, director or former
         director of COFI or any COFI Subsidiary or his or her beneficiaries,
         including, but not limited to, any employee benefit plans within the
         meaning of Section 3(3) of the Employee Retirement Income Security Act
         of 1974, as amended ("ERISA"), which COFI or any COFI Subsidiary
         maintains, to which COFI or any COFI Subsidiary contributes, or under
         which any employee, former employee, director or former director of
         COFI or any COFI Subsidiary is covered or has benefit rights and
         pursuant to which any liability of COFI or any COFI Subsidiary exists
         or is reasonably likely to occur, provided that the term "Plan or
         "Plans" is used in this Agreement for convenience only and does not
         constitute an acknowledgment that a particular arrangement is an
         employee benefit plan within the meaning of Section 3(3) of ERISA. No
         COFI Benefit Plan is a multi-employer plan within the meaning of
         Section 3(37) of ERISA.

                  (b) Each of the COFI Benefit Plans that is intended to be a
         pension, profit sharing, stock bonus, thrift, savings or employee stock
         ownership plan that is qualified under Section 401(a) of the Code
         ("COFI Qualified Plans") has been determined by the Internal Revenue
         Service to qualify under Section 401(a) of the Code, or an application
         for determination of such qualification has been timely made to the
         Internal Revenue Service prior to the end of the applicable remedial
         amendment period under Section 401(b) of the Code, and, to the best of
         COFI's knowledge, there exist no circumstances likely to adversely
         affect the qualified status of any such COFI Qualified Plan. All such
         COFI Qualified Plans established or maintained by COFI or any of the
         COFI Subsidiaries or to which COFI or any of the COFI Subsidiaries
         contribute are in compliance in all material respects with all
         applicable requirements of ERISA, and are in compliance in all material
         respects with all applicable requirements (including qualification and
         non-discrimination requirements) of the Code for obtaining the tax
         benefits the Code thereupon permits with respect to such COFI Qualified
         Plans. Neither COFI nor any COFI Subsidiary maintains, sponsors or
         contributes to a Qualified Plan that is a defined benefit pension plan
         subject to Title IV of ERISA. All accrued contributions and other
         payments required to be made by COFI or any COFI Subsidiary to any COFI
         Benefit Plan through December 31, 1996, have been made or reserves
         adequate for such purposes as of December 31, 1996 have been set aside
         therefor and reflected in the COFI Financial Statements dated as of
         December 31, 1996. Neither COFI nor any COFI Subsidiary is in material
         default in performing any of its respective contractual obligations
         under any of the COFI Benefit Plans or any related trust agreement or
         insurance contract, and there are no material outstanding liabilities
         of any such Plan other than liabilities for benefits to be paid to
         participants in such Plan and their beneficiaries in accordance with
         the terms of such Plan.

                  (c) There is no pending or, to the best knowledge of COFI and
         Charter One Bank, threatened litigation or pending claim (other than
         benefit claims made in the ordinary course) by or on behalf of or
         against any of the COFI Benefit Plans (or with respect to the
         administration of any of the such Plans) now or heretofore maintained
         by COFI or any COFI Subsidiary which allege violations of applicable
         state or federal law which are reasonably likely to result in a
         liability on the part of COFI or any COFI Subsidiary or any such Plan.


                                      A-13
<PAGE>   104



                  (d) COFI and the COFI Subsidiaries and all other persons
         having fiduciary or other responsibilities or duties with respect to
         any COFI Benefit Plan are and have since the inception of each such
         Plan been in substantial compliance with, and each such Plan is and has
         been operated in substantial accordance with, its provisions and in
         substantial compliance with the applicable laws, rules and regulations
         governing such Plan, including, without limitation, the rules and
         regulations promulgated by the Department of Labor, the Pension Benefit
         Guaranty Corporation ("PBGC") and the Internal Revenue Service under
         ERISA, the Code or any other applicable law. Notwithstanding the
         foregoing, no representation is made with respect to compliance by a
         third party insurance company. No "reportable event" (as defined in
         Section 4043(b) of ERISA) has occurred with respect to any COFI
         Qualified Plan. Neither COFI, any COFI Subsidiary nor any COFI Benefit
         Plan has incurred or is reasonably likely to incur any liability for
         any "prohibited transactions" (as defined in Section 406 of ERISA or
         Section 4975(a) of the Code), or any material liability under Section
         601 of ERISA or Section 4980 of the Code.

                  (e) COFI and the COFI Subsidiaries have filed or caused to be
         filed, and will continue to file or cause to be filed, in a timely
         manner all filings pertaining to each COFI Benefit Plan with the
         Internal Revenue Service, the PBGC, the Department of Labor, and as
         prescribed by the Code or ERISA, or regulations issued thereunder. All
         such filings, as amended, were complete and accurate in all material
         respects as of the dates of such filings. Notwithstanding the
         foregoing, no representation is made with respect to filings by a third
         party insurance company.

         2.19 COMPLIANCE WITH ENVIRONMENTAL LAWS.

                  (a) Except as set forth in Section 2.19 of the COFI Disclosure
         Schedule: (i) to the best knowledge of COFI and Charter One Bank, the
         operations of COFI and each of the COFI Subsidiaries comply in all
         material respects with all applicable past and present Environmental
         Laws (as defined below); (ii) to the best knowledge of COFI and Charter
         One Bank, none of the operations of COFI or any COFI Subsidiary, no
         assets presently or formerly owned or leased by COFI or any COFI
         Subsidiary and no Mortgaged Premises (as defined below) or a
         Participating Facility (as defined below) are subject to any judicial
         or administrative proceedings alleging the violation of any past or
         present Environmental Law, nor are they the subject of any claims
         alleging damages to health or property, pursuant to which COFI, any
         COFI Subsidiary or any owner of a Mortgaged Premises or a Participating
         Facility would be liable in law or equity; (iii) none of the operations
         of COFI or any COFI Subsidiary, no assets presently owned or, to the
         best knowledge of COFI and Charter One Bank, formerly owned by COFI or
         any COFI Subsidiary, and, to the best knowledge of COFI and Charter One
         Bank, no Mortgaged Premises or Participating Facility are the subject
         of any federal, state or local investigation evaluating whether any
         remedial action is needed to respond to a release or threatened release
         of any Hazardous Substance (as defined below), or any other substance
         into the environment, nor has COFI or any COFI Subsidiary, or, to the
         best knowledge of COFI and Charter One Bank, any owner of a Mortgaged
         Premises or Participating Facility been directed to conduct such
         investigation, formally or informally, by any governmental agency, nor
         have any of them agreed with any governmental agency or private person
         to conduct any such investigation; and (iv) neither COFI or any COFI
         Subsidiary, nor, to the best knowledge of COFI and Charter One Bank,
         any owner of a Mortgaged Premises or a Participating Facility has filed
         any notice under any Environmental Law indicating past or present
         treatment, storage or disposal of a Hazardous Substance or reporting a
         spill or release of a Hazardous Substance, or any other substance into
         the environment.

                  (b) For purposes of this Section, "Mortgaged Premises" shall
         mean each (i) real property interest (including without limitation any
         fee or leasehold interest) which is encumbered or affected by any
         mortgage, deed of trust, deed to secure debt or other similar document
         or instrument granting to any party hereto or any of its Subsidiaries a
         lien on or security interest in such real property interest and (ii)
         any other real property interest upon which is situated assets or other
         property affected or encumbered by any document or instrument granting
         to any party hereto or any of its Subsidiaries a lien thereon or
         security interest therein; provided, however, that the term "Mortgaged
         Premises" shall not include one- to four-unit, single-family
         residences, and


                                      A-14
<PAGE>   105


         in the case of COFI and the COFI Subsidiaries, any real property
         interest securing a loan with a principal balance of less than one
         million dollars, and in the case of RCSB and the RCSB Subsidiaries, any
         real property interest securing a loan with a principal balance of less
         than five hundred thousand dollars. For purposes of this Section,
         "Participating Facility" means any property in which any party hereto
         or any of its Subsidiaries participates in the management of such
         property and, where the context requires, includes the owner or
         operator of such property. For purposes of this Agreement, "Hazardous
         Substance" has the meaning set forth in Section 9601 of the
         Comprehensive Environmental Response Compensation and Liability Act of
         1980, 42 U.S.C.A., Section 9601 et seq., and also includes any
         substance now or hereafter regulated by or subject to any Environmental
         Laws (as defined below) and any other pollutant, contaminant, or waste,
         including without limitation, petroleum, asbestos, fiberglass, radon,
         and polychlorinated biphenyls. For purposes of this Agreement,
         "Environmental Laws" means all laws (civil or common), ordinances,
         rules, regulations, guidelines, and orders that: (i) regulate air,
         water, soil, and solid waste management, including the generation,
         release, containment, storage, handling, transportation, disposition,
         or management of any Hazardous Substance; (ii) regulate or prescribe
         requirements for air, water, or soil quality; (iii) are intended to
         protect public health or the environment; or (iv) establish liability
         for the investigation, removal, or cleanup of, or damage caused by, any
         Hazardous Substance.

         2.20 CONTRACTS AND COMMITMENTS. Section 2.20 of the COFI Disclosure
Schedule contains, and shall be supplemented by COFI, as required by Section
5.10 hereof, so as to contain at the Closing Date copies of each of the
following documents, certified by an officer of COFI to be true and correct
copies of such documents on the dates of such certificates.

                  (a) The Certificate or Articles of Incorporation, Charters and
         Bylaws of COFI and each COFI Subsidiary.

                  (b) All judgments, orders, injunctions, court decrees or
         settlement agreements arising out of or relating to the labor and
         employment practices or decisions of COFI or any COFI Subsidiary which,
         by their terms, continue to bind or affect COFI or any COFI Subsidiary.

                  (c) All orders, decrees, memorandums, agreements or
         understandings with regulatory agencies binding upon or affecting the
         current operations of COFI or any COFI Subsidiary or any of their
         directors or officers in their capacities as such.

         2.21 DEFAULTS. There has not been any default in any material
obligation to be performed by COFI or any COFI Subsidiary under any material
contract or commitment, and neither COFI nor any COFI Subsidiary has waived, any
material right under any material contract or commitment. To the best knowledge
of COFI and Charter One Bank, no other party to any material contract or
commitment is in default in any material obligation to be performed by such
party.

         2.22 OPERATIONS SINCE DECEMBER 31, 1996. Between December 31, 1996 and
the date hereof, except as set forth in Section 2.22 of the COFI Disclosure
Schedule, there has not been:

                  (a) any creation or assumption of indebtedness (including the
         extension or renewal of any existing indebtedness, or the increase
         thereof) by COFI or any COFI Subsidiary for borrowed money, or
         otherwise, other than in the ordinary course of business, none of which
         is in default;

                  (b) any change in COFI's independent auditors, historic
         methods of accounting (other than as required by generally accepted
         accounting principles or regulatory accounting principles), or in its
         system for maintaining its equipment and real estate; or


                                      A-15
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                  (c) any event or condition of any character (other than
         changes in legal, economic or other conditions which are not specially
         or uniquely applicable to COFI or any COFI Subsidiary) materially
         adversely affecting the business, operations or financial condition of
         COFI on a consolidated basis.

         2.23 UNDISCLOSED LIABILITIES. All of the obligations or liabilities
(whether accrued, absolute, contingent, unliquidated or otherwise, whether due
or to become due, and regardless of when asserted) arising out of transactions
or events heretofore entered into, or any action or inaction, including taxes
with respect to or based upon transactions or events heretofore occurring, that
are required to be reflected, disclosed or reserved against in audited
consolidated financial statements in accordance with generally accepted
accounting principles ("Liabilities") have, in the case of COFI and the COFI
Subsidiaries, been so reflected, disclosed or reserved against in the COFI
Financial Statements dated as of December 31, 1996 or in the notes thereto, and
COFI and the COFI Subsidiaries have no other Liabilities except (a) Liabilities
incurred since December 31, 1996 in the ordinary course of business, (b)
Liabilities under the Haverfield Definitive Agreement or (c) as disclosed in
Section 2.23 of the COFI Disclosure Schedule.

         2.24 ASSETS.

                  (a) COFI and the COFI Subsidiaries have good, and marketable
         title to their real properties, including any leaseholds and ground
         leases, and their other assets and properties, all as reflected as
         owned or held by COFI in the COFI Financial Statements dated as of
         December 31, 1996, and those acquired since such date, except for (i)
         assets and properties disposed of since such date in the ordinary
         course of business and (ii) liens, none of which, in the aggregate,
         except as set forth in the COFI Financial Statements dated as of
         December 31, 1996 or in Section 2.24 of the COFI Disclosure Schedule,
         are material to the assets of COFI on a consolidated basis. All
         buildings, structures, fixtures and appurtenances comprising part of
         the real properties of COFI and the COFI Subsidiaries (whether owned or
         leased) are in good operating condition and have been well maintained,
         reasonable wear and tear excepted. Title to all real property owned by
         COFI and the COFI Subsidiaries is held in fee simple, except as
         otherwise noted in the COFI Financial Statements as of December 31,
         1996 or as set forth in Section 2.24 of the COFI Disclosure Schedule.
         COFI and the COFI Subsidiaries have title or other rights to its assets
         sufficient in all material respects for the conduct of their respective
         businesses as presently conducted, and except as set forth in the COFI
         Financial Statements dated as of December 31, 1996, or in Section 2.24
         of the COFI Disclosure Schedule, such assets are free, clear and
         discharged of and from any and all liens, charges, encumbrances,
         security interests and/or equities which are material to COFI or any
         COFI Subsidiary.

                  (b) All leases pursuant to which COFI or any COFI Subsidiary,
         as lessee, leases real or personal property which are material to the
         business of COFI on a consolidated basis are, to the best knowledge of
         COFI and Charter One Bank, valid, effective, and enforceable against
         the lessor in accordance with their respective terms. There is not
         under any of such leases any existing default, or any event which, with
         notice or lapse of time or both, would constitute a default, with
         respect to COFI or any COFI Subsidiary, or to the best knowledge of
         COFI and Charter One Bank, and the other party.

         2.25 INDEMNIFICATION. To the best knowledge of COFI and Charter One
Bank, except as set forth in Section 2.25 of the COFI Disclosure Schedule, no
action or failure to take action by any director, officer, employee or agent of
COFI or any COFI Subsidiary has occurred which would give rise to a claim by any
such person for indemnification from COFI or any COFI Subsidiary under the
corporate indemnification provisions of such entity in effect on the date of
this Agreement.

         2.26 INSIDER INTERESTS. All outstanding loans and other contractual
arrangements (including deposit relationships) between COFI or any COFI
Subsidiary and any of its officers, directors or employees conform to applicable
rules and regulations and requirements of all applicable regulatory agencies
which were in effect when such loans and other contractual arrangements were
entered into. Except as set forth in Section 2.26 of the COFI Disclosure


                                      A-16
<PAGE>   107



Schedule, no officer, director or employee of COFI or any COFI Subsidiary has
any material interest in any property, real or personal, tangible or intangible,
used in or pertaining to the business of COFI or any COFI Subsidiary.

         2.27 BROKERS AND FINDERS. Neither COFI nor any COFI Subsidiary nor any
of their respective officers, directors or employees has employed any broker or
finder or incurred any liability for any financial advisory fees (other than in
connection with a fairness opinion), brokerage fees, commissions or finders's
fees, and no broker or finder has acted directly or indirectly for COFI or any
COFI Subsidiary, in connection with this Agreement or the transactions
contemplated hereby.

         2.28 ACCURACY OF INFORMATION. The statements of COFI and Charter One
Bank contained in this Agreement, the Schedules hereto and in any other written
document executed and delivered by or on behalf of COFI or Charter One Bank
pursuant to the terms of this Agreement are true and correct in all material
respects.

         2.29 FAIRNESS OPINION. COFI has received from Montgomery Securities a
fairness opinion, dated as of the date of this Agreement, to the effect that the
Company Merger is fair to the stockholders of COFI from a financial point of
view.

         2.30 GOVERNMENTAL APPROVALS AND OTHER CONDITIONS. To the best knowledge
of COFI and Charter One Bank, there is no reason relating specifically to COFI
or any COFI Subsidiary why (a) the approvals that are required to be obtained
from regulatory authorities having approval authority in connection with the
transactions contemplated hereby should not be granted, (b) such regulatory
approvals should be subject to a condition which would differ from conditions
customarily imposed by such regulatory authorities in orders approving
acquisitions of the type contemplated hereby or (c) any of the conditions
precedent as specified in Article VI hereof to the obligations of any of the
parties hereto to consummate the transactions contemplated hereby are unlikely
to be fulfilled within the applicable time period or periods required for
satisfaction of such condition or conditions.

         2.31 NO OWNERSHIP IN RCSB.  Neither COFI nor any COFI Subsidiary owns 
any RCSB Common Stock.

                                   ARTICLE III

             REPRESENTATIONS AND WARRANTIES OF RCSB AND TARGET BANK

         RCSB and Target Bank jointly and severally represent and warrant to
COFI and Charter One Bank that except as set forth in that certain confidential
writing delivered by RCSB to COFI on or before the date hereof (the "RCSB
Disclosure Schedule"):

         3.1 ORGANIZATION. RCSB is a corporation duly organized, validly
existing and in good standing under the laws of the State of Delaware and has
all requisite power and authority, corporate and otherwise, to own, operate and
lease its assets and properties and to carry on its business substantially as it
is now being conducted. RCSB is duly licensed or qualified to do business and is
in good standing in each jurisdiction where the character of the assets or
properties owned or leased by it or the nature of the business transacted by it
requires that it be so licensed or qualified, except where the failure to be so
licensed or qualified would not have a Material Adverse Effect on RCSB or its
ability to consummate the transactions contemplated herein. RCSB has all
requisite corporate power and authority to enter into this Agreement and,
subject to the approval of this Agreement and the Company Merger by its
stockholders and the receipt of all requisite regulatory approvals and the
expiration of any applicable waiting periods, to consummate the transactions
contemplated hereby. RCSB is duly registered as a savings and loan holding
company under HOLA.

         3.2 AUTHORIZATION. The execution, delivery and performance of this
Agreement and the consummation of the transactions contemplated hereby have been
duly and unanimously approved and authorized by the Boards of Directors of RCSB
and Target Bank, and all necessary corporate action on the part of RCSB and
Target Bank has been taken, subject to the approval of this Agreement and the
Company Merger by the holders of a majority of the issued and


                                      A-17
<PAGE>   108



outstanding RCSB Common Stock. This Agreement has been duly executed and
delivered by RCSB and Target Bank and constitutes the valid and binding
obligation of each of them and is enforceable against each of them, except to
the extent that enforceability thereof may be limited by applicable bankruptcy,
insolvency, reorganization, moratorium or similar laws or equitable principles
or doctrines.

         3.3 CONFLICTS. Subject to the second sentence of this Section 3.3, the
execution and delivery of this Agreement does not, and the consummation of the
transactions contemplated hereby will not, conflict with or result in any
violation, breach or termination of, or default or loss of a material benefit
under, or permit the acceleration of any obligation under, or result in the
creation of any lien, charge or encumbrance on any property or assets under, any
provision of the Certificate of Incorporation or Bylaws of RCSB or similar
documents of any RCSB Subsidiary (as defined in Section 3.7 hereof), or any
material mortgage, indenture, lease, agreement or other instrument, permit,
concession, grant, franchise, license, judgment, order, decree, statute, law,
ordinance, rule or regulation applicable to RCSB or any RCSB Subsidiary or their
respective properties, other than any such conflicts, violations or defaults
which (i) will be cured or waived prior to the Effective Time or (ii) are
disclosed in Section 3.3 of the RCSB Disclosure Schedule. No consent, approval,
order or authorization of, or registration, declaration or filing with, any
federal or state governmental authority is required by or with respect to RCSB
or Target Bank in connection with the execution and delivery of this Agreement
or the consummation by RCSB or Target Bank of the transactions contemplated
hereby except for the filings, approvals or waivers contemplated by Section 2.3
hereof and consents that are not material to the transactions contemplated
hereby.

         3.4 ANTI-TAKEOVER PROVISIONS INAPPLICABLE. No "business combination,"
"moratorium," "control share" or other state anti-takeover statute or
regulation, (i) applies to the Merger, the Voting Agreements or the Stock Option
Agreement, (ii) prohibits or restricts the ability of RCSB or Target Bank to
perform its obligations under this Agreement, or its ability to consummate the
transactions contemplated hereby, (iii) would have the effect of invalidating or
voiding this Agreement, any of the Voting Agreements, or the Stock Option
Agreement, or any provision hereof or thereof, or (iv) would subject COFI,
Charter Michigan or Charter One Bank to any material impediment or condition in
connection with the exercise of any of its right under this Agreement, any of
the Voting Agreements, or the Stock Option Agreement.

         3.5      CAPITALIZATION AND STOCKHOLDERS.

                  (a) The authorized capital stock of RCSB consists of (i)
         50,000,000 shares of RCSB Common Stock, $1.00 par value per share, of
         which 14,477,106 shares are issued and outstanding and 947,100 shares
         are held as treasury shares, in each case as of the date of this
         Agreement, and (ii) 50,000,000 shares of series preferred stock, $1.00
         par value, consisting of 200,000 shares of Series A junior
         participating preferred stock and 4,000,000 shares of 7% noncumulative,
         convertible perpetual preferred stock Series B, of which none are
         issued and outstanding. All of the issued and outstanding shares of
         RCSB Common Stock have been duly and validly authorized and issued, and
         are fully paid and non-assessable. None of the outstanding shares of
         RCSB Common Stock has been issued in violation of any preemptive rights
         of current or past stockholders or are subject to any preemptive rights
         of the current or past stockholders of RCSB. All of the issued and
         outstanding shares of RCSB Common Stock will be entitled to vote to
         approve this Agreement and the Company Merger.

                  (b) As of the date hereof, RCSB had 929,484 shares of RCSB
         Common Stock reserved for issuance under the 1986 Option Plan and 1992
         Option Plan for the benefit of employees and directors of RCSB and the
         RCSB Subsidiaries, pursuant to which options covering 759,464 shares of
         RCSB Common Stock are outstanding (the "RCSB Stock Options"). Except as
         set forth in this Section, there are no shares of capital stock or
         other equity securities of RCSB outstanding and no outstanding options,
         warrants, scrip, rights to subscribe to, calls or commitments of any
         character whatsoever relating to, or securities or rights convertible
         into or exchangeable for, shares of the capital stock of RCSB, or
         contracts, commitments, understandings, or arrangements by which RCSB
         is or may be bound to issue additional shares of its capital stock or
         options, warrants, or rights to purchase or acquire any additional
         shares of its capital stock. Section 3.5 of the RCSB Disclosure
         Schedule sets forth the name of the holder of each RCSB Stock Option
         and the date of grant of,


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<PAGE>   109



         number of shares represented by, exercise price and expiration of, and
         vesting or performance requirements associated with, each RCSB Stock
         Option.

         3.6 RCSB FINANCIAL STATEMENTS; MATERIAL CHANGES. RCSB has heretofore
delivered to COFI its audited consolidated financial statements for fiscal years
ended November 30, 1996 and November 30, 1995 (together the "RCSB Financial
Statements"). The RCSB Financial Statements (x) are true and correct in all
material respects; (y) have been prepared in accordance with generally accepted
accounting principles applied on a consistent basis during the periods involved
(except as may be indicated in the notes thereto); and (z) fairly present the
consolidated financial position of RCSB as of the dates thereof and the
consolidated results of its operations, shareholders' equity, cash flows and
changes in financial position for the periods then ended. Since November 30,
1996 to the date hereof, RCSB and the RCSB Subsidiaries have not undergone or
suffered any changes in their respective condition (financial or otherwise),
properties, business or operations which have been, in any case or in the
aggregate, materially adverse to RCSB on a consolidated basis. No facts or
circumstances have been discovered from which it reasonably appears that there
is a significant risk or reasonable probability that RCSB will suffer or
experience a Material Adverse Effect.

         3.7 RCSB SUBSIDIARIES.

                  (a) All of the RCSB Subsidiaries are listed in Section 3.7 of
         the RCSB Disclosure Schedule. RCSB owns directly or indirectly all of
         the issued and outstanding shares of capital stock of the RCSB
         Subsidiaries. Section 3.7 of the RCSB Disclosure Schedule sets forth
         the number of shares of authorized and outstanding capital stock of the
         RCSB Subsidiaries. Except for equity securities of the Federal Home
         Loan Bank of New York or as set forth in Section 3.7 of the RCSB
         Disclosure Schedule, neither RCSB nor the RCSB Subsidiaries own
         directly or indirectly any equity securities, or other proprietary
         interest in any other corporation, limited liability company, joint
         venture, partnership, entity, association or other business. No capital
         stock of any of the RCSB Subsidiaries is or may become required to be
         issued (other than to RCSB) by reason of any options, warrants, scrip,
         rights to subscribe to, calls, or commitments of any character
         whatsoever relating to, or securities or rights convertible into or
         exchangeable for, shares of the capital stock of any RCSB Subsidiary.
         There are no contracts, commitments, understandings or arrangements
         relating to the rights of RCSB to vote or to dispose of shares of the
         capital stock of any RCSB Subsidiary. All of the shares of capital
         stock of each RCSB Subsidiary are fully paid and non-assessable and are
         owned by RCSB or another RCSB Subsidiary free and clear of any claim,
         lien or encumbrance, except as disclosed in Section 3.7 of the RCSB
         Disclosure Schedule.

                  (b) Each RCSB Subsidiary is either a savings bank or a
         corporation and is duly organized, validly existing and in good
         standing under the laws of the jurisdiction in which it is incorporated
         or organized, and is duly licensed or qualified to do business and is
         in good standing in each jurisdiction where the character of the assets
         or properties owned or leased by it or the nature of the business
         transacted by it requires it to be so licensed or qualified, except
         where the failure to be so licensed or qualified would not have a
         Material Adverse Effect on RCSB. Each RCSB Subsidiary has the corporate
         power and authority necessary for it to own, operate or lease its
         assets and properties and to carry on its business as it has been and
         is now being conducted.

                  (c) For purposes of this Agreement, an "RCSB Subsidiary" or a
         "Subsidiary" of RCSB shall mean each corporation, savings bank, and
         other entity in which RCSB owns or controls directly or indirectly 10%
         or more of the outstanding equity securities; provided, however, there
         shall not be included (i) Gateway American Bank, (ii) any entity that
         is inactive on the date of this Agreement, (iii) any entity acquired in
         good faith through foreclosure, or (iv) any entity to the extent that
         the equity securities of such entity are owned or controlled in a bona
         fide fiduciary capacity.

                  (d) Target Bank is a member in good standing of the Federal
         Home Loan Bank System. All eligible deposit accounts issued by Target
         Bank are insured by the FDIC through the Bank Insurance Fund ("BIF") or
         the SAIF to the full extent permitted under applicable law. Target Bank
         is, and at all times since


                                      A-19
<PAGE>   110



         June 1, 1990 has been, a "domestic building and loan association" as
         defined in Section 7701(a)(19) of the Code. The liquidation account
         established by Target Bank in connection with its conversion from
         mutual to stock form has been maintained since its establishment in
         accordance with applicable laws and the records with respect to said
         account are complete and accurate in all material respects.

         3.8 RCSB FILINGS. RCSB has previously made available, or will make
available prior to the Effective Time, to COFI true and complete copies of the
(i) proxy statements relating to all meetings of stockholders (whether special
or annual) of RCSB during calendar years 1995, 1996 and 1997 and (ii) all other
reports, as amended, or filings, as amended, required to be filed under the
Exchange Act by RCSB with the SEC since its formation including without
limitation on Forms 10-K, 10-Q and 8-K.

         3.9 RCSB REPORTS. Each of RCSB and the RCSB Subsidiaries has filed, and
will continue to file, all material reports and statements, together with any
amendment required to be made with respect thereto, that it has, or will be,
required to file with the SEC, FDIC, OTS, Department, NASD, and other applicable
thrift, securities and other regulatory authorities. As of their respective
dates (and without giving effect to any amendments or modifications filed after
the date of this Agreement with respect to reports and documents filed before
the date of this Agreement), each of such reports and documents, including the
financial statements, exhibits, and schedules thereto, complied in all material
respects with all of the statutes, rules and regulations enforced or promulgated
by the authority with which they were filed and did not contain any untrue
statement of a material fact or omit to state any material fact necessary in
order to make the statements made therein, in light of the circumstances under
which they were made, not misleading. Other than normal examinations conducted
by the Internal Revenue Service, state and local taxing authorities, OTS,
Department or FDIC in the regular course of the business of RCSB or the RCSB
Subsidiaries, no federal, state or local governmental agency, commission or
other entity has initiated any proceeding or, to the best knowledge of RCSB and
Target Bank, investigation into the business or operations of RCSB or the RCSB
Subsidiaries within the past two years except as set forth in Section 3.9 of the
RCSB Disclosure Schedule. There is no unresolved violation, criticism or
exception by the SEC, OTS, Department, FDIC or other agency, commission or
entity with respect to any report or statement referred to herein that is
material to RCSB or any RCSB Subsidiary.

         3.10 COMPLIANCE WITH LAWS.

                  (a) Except as disclosed in Section 3.10 of the RCSB Disclosure
         Schedule, the businesses of RCSB and the RCSB Subsidiaries are being
         conducted, in all material respects, in compliance with all laws,
         ordinances or regulations of governmental authorities, including
         without limitation, laws affecting financial institutions (including
         those pertaining to the Bank Secrecy Act, the investment of funds, the
         lending of money, the collection of interest and the extension of
         credit), federal and state securities laws, laws and regulations
         relating to financial statements and reports, truth-in-lending,
         truth-in-savings, usury, fair credit reporting, consumer protection,
         occupational safety, fair employment practices, fair labor standards
         and all other laws and regulations relating to employees and employee
         benefits, and any statutes or ordinances relating to the properties
         occupied or used by RCSB or any RCSB Subsidiary.

                  (b) Except as disclosed in Section 3.10 of the RCSB Disclosure
         Schedule, no investigation or review by any governmental entity with
         respect to RCSB or any RCSB Subsidiary is pending or, to the best
         knowledge of RCSB and Target Bank, threatened, nor has any governmental
         entity indicated to RCSB or any RCSB Subsidiary an intention to conduct
         the same, other than normal or routine regulatory examinations.

                  (c) RCSB and each of the RCSB Subsidiaries, where applicable,
         is in substantial compliance with the applicable provisions of the
         Community Reinvestment Act of 1977 and the regulations promulgated
         thereunder. As of the date of this Agreement, neither RCSB nor Target
         Bank has been advised of the existence of any fact or circumstance or
         set of facts or circumstances which, if true, would cause RCSB or any
         of the RCSB Subsidiaries to fail to be in substantial compliance with
         such provisions. Target Bank has not received a rating from an
         applicable regulatory authority which is less than "satisfactory."


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         3.11 REGISTRATION STATEMENT: JOINT PROXY STATEMENT. The information to
be supplied by RCSB for inclusion in the Registration Statement will not, at the
time the Registration Statement is declared effective and at the Effective Time,
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary in order to make the statements
therein, in the light of the circumstances under which they were made, not
misleading. The information to be supplied by RCSB for inclusion in the Joint
Proxy Statement will not, on the date of the Joint Proxy Statement (or any
amendment thereof or supplement thereto) is first mailed to the stockholders of
COFI or RCSB, or at the time of their respective meetings of stockholders to
vote on this Agreement and the Company Merger, and at the Effective Time,
contain any statement that, in light of the circumstances under which it is
made, is false or misleading with respect to any material fact, omits to state
any material fact necessary in order to make the statements made therein not
false or misleading, or omits to state any material fact necessary to correct
any statement in any earlier communication with respect to the solicitation of
proxies for such meetings of stockholders that has become false or misleading.
If at any time prior to the Effective Time, any event relating to RCSB or any of
its affiliates, officers or directors is discovered by RCSB that should be set
forth in an amendment to the Registration Statement or a supplement to the Joint
Proxy Statement, RCSB will promptly inform COFI, and such amendment or
supplement will be promptly filed with the SEC and, as required by law,
disseminated to the stockholders of RCSB. Notwithstanding the foregoing, RCSB
makes no representation or warranty with respect to any information supplied by
COFI that is contained in the Registration Statement or the Joint Proxy
Statement. The Joint Proxy Statement will (with respect to RCSB) comply in all
material respects as to form and substance with the requirements of the Exchange
Act and the rules and regulations thereunder.

         3.12 LITIGATION. Except as disclosed in Section 3.12 of the RCSB
Disclosure Schedule, there is no suit, action, investigation or proceeding,
legal, quasi-judicial, administrative or otherwise, pending or, to the best
knowledge of RCSB and Target Bank threatened, against or affecting RCSB or any
RCSB Subsidiary, or any of their respective officers, directors, employees or
agents, in their capacities as such, which is seeking equitable relief or
damages against RCSB, any RCSB Subsidiary, or any of their respective officers,
directors, employees or agents, in their capacities as such, in excess of
$50,000, or which would materially affect the ability of RCSB or Target Bank to
consummate the transactions contemplated herein or which is seeking to enjoin
consummation of the transactions provided for herein or to obtain other relief
in connection with this Agreement or the transactions contemplated hereby, nor
is there any judgment, decree, injunction, rule or order of any court,
governmental department, commission, agency, instrumentality or arbitrator
outstanding against RCSB or any RCSB Subsidiary or any of their respective
officers, directors, employees or agents, in their capacities as such, having,
or which, insofar as reasonably can be foreseen in the future, would have any
such effect.

         3.13 LICENSES. RCSB and the RCSB Subsidiaries hold all licenses,
certificates, permits, franchises and all patents, trademarks, service marks,
trade names, copyrights or right thereto, and required authorizations,
approvals, consents, licenses, clearances and orders or registrations with all
appropriate federal, state or other authorities that are material to the conduct
of their respective businesses as now conducted and as presently proposed to be
conducted.

         3.14 TAXES.

                  (a) Except as disclosed in Section 3.14 of the RCSB Disclosure
         Schedule, RCSB and the RCSB Subsidiaries have each timely filed all tax
         and information returns required to be filed and have paid (or RCSB or
         Target Bank has paid on behalf of its Subsidiaries), or have accrued on
         their respective books and set up an adequate reserve for the payment
         of, all taxes reflected on such returns as required to be paid in
         respect of the periods covered by such returns and have accrued on
         their respective books and set up an adequate reserve for the payment
         of all income and other taxes anticipated to be payable in respect of
         periods through the end of the calendar month next preceding the date
         hereof. Neither RCSB nor any RCSB Subsidiary is delinquent in the
         payment of any tax, assessment or governmental charge. No deficiencies
         for any taxes have been proposed, asserted or assessed against RCSB or
         any RCSB Subsidiary that have not been resolved or settled and no
         requests for waivers of the time to assess any such tax are pending or
         have been agreed to. The income tax returns of RCSB and RCSB
         Subsidiaries have not been audited by the Internal Revenue Service,
         state, municipal or other taxing authority for any of the last two
         years. Neither RCSB nor any RCSB Subsidiary is


                                      A-21
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         a party to any action or proceeding by any governmental authority for
         the assessment or the collection of taxes. Deferred taxes of RCSB and
         the RCSB Subsidiaries have been accounted for in accordance with
         generally accepted accounting principles.

                  (b) RCSB has not filed any consolidated federal income tax
         return with an "affiliated group" (within the meaning of Section 1504
         of the Code) where RCSB was not the common parent of the group. Neither
         RCSB nor any RCSB Subsidiary is, or has been, a party to any tax
         allocation agreement or arrangement pursuant to which it has any
         contingent or outstanding liability to anyone other than RCSB or any
         RCSB Subsidiary. Neither RCSB nor any RCSB Subsidiary is required to
         include in income any adjustment pursuant to Section 481(a) of the Code
         and no such adjustment has been proposed by the Internal Revenue
         Service. Neither RCSB nor any RCSB Subsidiary has filed a consent
         pursuant to Section 341(f) of the Code or agreed to have Section
         341(f)(2) of the Code apply.

                  (c) RCSB and the RCSB Subsidiaries have each withheld amounts
         from its employees, stockholders, or holders of public deposit accounts
         in compliance with the tax withholding provisions of applicable
         federal, state and local laws, have filed all federal, state and local
         returns and reports for all periods for which such returns or reports
         would be due with respect to income tax withholding, social security,
         unemployment taxes, income and other taxes and all payments or deposits
         with respect to such taxes have been timely made and except as set
         forth in Section 3.14 of the RCSB Disclosure Schedule, have notified
         all employees, stockholders and holders of public deposit accounts of
         their obligations to file all forms, statements or reports with it in
         accordance with applicable federal, state and local tax laws and have
         taken reasonable steps to insure that such employees, stockholders and
         holders of public deposit accounts have filed all such forms statements
         and reports with it.

         3.15 INSURANCE. RCSB and the RCSB Subsidiaries maintain insurance with
insurers which in the best judgment of management of RCSB are sound and
reputable on their respective assets and upon their respective businesses and
operations against loss or damage, risks, hazards and liabilities as in their
judgment they deem appropriate. RCSB and the RCSB Subsidiaries maintain in
effect all insurance required to be carried by law or by any agreement by which
they are bound. All material claims under all policies of insurance maintained
by RCSB and the RCSB Subsidiaries have been filed in due and timely fashion.
Each of RCSB and the RCSB Subsidiaries has taken or will timely take all
requisite action (including without limitation the making of claims and the
giving of notices) pursuant to its directors' and officers' liability insurance
policy or policies in order to preserve all rights thereunder with respect to
all matters (other than matters arising in connection with this Agreement and
the transactions contemplated hereby) occurring prior to the Effective Time.
Neither RCSB nor any of the RCSB Subsidiaries has, during the past three years,
had an insurance policy canceled or been denied insurance coverage for which any
of such companies has applied.

         3.16 LOANS; INVESTMENTS.

                  (a) Except as otherwise disclosed in Section 3.16 of the RCSB
         Disclosure Schedule, each material loan reflected as an asset on the
         RCSB Financial Statement dated as of November 30, 1996, and each
         material loan originated or acquired by RCSB or an RCSB Subsidiary
         since such date, is evidenced by appropriate and sufficient
         documentation and constitutes, to the best knowledge of RCSB and Target
         Bank, the legal, valid and binding obligation of the obligor named
         therein, enforceable in accordance with its terms, except to the extent
         that the enforceability thereof may be limited by bankruptcy,
         insolvency, reorganization, moratorium or similar laws or equitable
         principles or doctrines. Except as set forth in Section 3.16 of the
         RCSB Disclosure Schedule and loans sold in the ordinary course of
         business, all such loans are, and at the Effective Time will be, free
         and clear of any security interest, lien, encumbrance or other charge.
         Except as set forth in Section 3.16 of the RCSB Disclosure Schedule,
         there is no loan or other asset of RCSB or of any RCSB Subsidiary that
         has been classified by examiners or others as "Other Loans of Concern,"
         "Substandard," "Doubtful" or "Loss" as of April 30, 1997. Set forth in
         Section 3.16 of the RCSB Disclosure Schedule is a


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         complete list of the real estate acquired through foreclosure,
         repossession or deed in lieu thereof ("REO") of RCSB and the RCSB
         Subsidiaries as of April 30, 1997.

                  (b) All material guarantees of indebtedness owed to RCSB or
         any RCSB Subsidiary, including but not limited to those of the Federal
         Housing Administration, the Small Business Administration, and other
         state and federal agencies, are, to the best knowledge of RCSB and
         Target Bank, valid and enforceable, except to the extent enforceability
         thereof may be limited by applicable bankruptcy, insolvency,
         reorganization, moratorium or similar laws or equitable principles or
         doctrines.

                  (c) All interest rate swaps, caps, floors and option
         agreements and other interest rate risk management arrangements to
         which RCSB or any RCSB Subsidiary is a party or by which any of their
         properties or assets may be bound were entered into in the ordinary
         course of business and, to the best knowledge of RCSB and Target Bank,
         in accordance with then-customary practice and applicable rules,
         regulations and policies of thrift regulatory authorities and with
         counterparties believed to be financially responsible at the time and
         are legal, valid and binding obligations and are in full force and
         effect. RCSB and the RCSB Subsidiaries have duly performed in all
         material respects all of their respective obligations thereunder to the
         extent that such obligations to perform have accrued, and to the best
         knowledge of RCSB and Target Bank, there are no material breaches,
         violations or defaults or allegations or assertions of such by any
         party thereunder. Except as set forth in Section 3.16 of the RCSB
         Disclosure Schedule, none of the transactions contemplated by this
         Agreement would permit: (i) a counterparty under any interest rate
         swap, cap, floor and option agreement or any other interest rate risk
         management agreement or (ii) any party to any mortgage-backed security
         financing arrangement, to accelerate, discontinue, terminate or
         otherwise modify any such agreement or arrangement or would require
         RCSB or any RCSB Subsidiary to recognize any gain or loss with respect
         to such arrangement.

                  (d) Except as set forth in Section 3.16 of the RCSB Disclosure
         Schedule and except for pledges to secure public and trust deposits,
         none of the investments reflected in the RCSB Financial Statements
         dated as of November 30, 1996 under the heading "Investment Securities,
         " and none of the investments made by RCSB and the RCSB Subsidiaries
         since November 30, 1996, is subject to any restriction, whether
         contractual or statutory, which materially impairs the ability of RCSB
         or any RCSB Subsidiary to freely dispose of such investment at any
         time, other than those restrictions imposed on securities held for
         investment under generally accepted accounting principles. With respect
         to all repurchase agreements to which RCSB or any RCSB Subsidiary is a
         party, RCSB or such Subsidiary has a valid, perfected first lien or
         security interest in the government securities or other collateral
         securing each such repurchase agreement, and the value of the
         collateral securing each such repurchase agreement equals or exceeds
         the amount of the debt secured by such collateral under such agreement.

                  (e) All United States Treasury securities, obligations of
         other United States Government agencies and corporations, obligations
         of States of United States and their political subdivisions, and other
         investment securities classified as "held to maturity" and "available
         for sale" held by RCSB and the RCSB Subsidiaries, as reflected in the
         RCSB Financial Statements dated November 30, 1996 were classified and
         accounted for in accordance with F.A.S.B. 115 and the intentions of
         management.

         3.17 ALLOWANCE FOR POSSIBLE LOAN LOSSES.

                  (a) The allowance for possible loan losses shown on the RCSB
         Financial Statements as of November 30, 1996 (and as shown on any
         financial statements to be delivered by RCSB to COFI pursuant to
         Section 5.7 hereof), to the best knowledge of RCSB and Target Bank, as
         of such date was (and will be as of such subsequent financial statement
         dates) adequate in all respects to provide for possible or specific
         losses, net of recoveries relating to loans previously charged off, on
         loans outstanding, and contained (or will contain) an additional amount
         of unallocated reserves for unanticipated future losses at a level
         considered adequate under the standards applied by applicable federal
         regulatory authorities and based upon generally accepted practices
         applicable to Target Bank and the other RCSB Subsidiaries. To the best
         knowledge of RCSB and


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         Target Bank, the aggregate principal amount of loans contained (or that
         will be contained) in the loan portfolio of RCSB and the RCSB
         Subsidiaries as of November 30, 1996 (and as of the dates of any
         financial statements to be delivered by RCSB to COFI pursuant to
         Section 5.7 hereof), in excess of such reserve, was (and will be) fully
         collectible.

                  (b) The sum of the aggregate amount of all Nonperforming
         Assets (as defined below) and all troubled debt restructurings (as
         defined under generally accepted accounting principles) on the books of
         RCSB and the RCSB Subsidiaries does not exceed 1.8% of total loans as
         of April 30, 1997. "Nonperforming Assets" shall mean (i) all loans and
         leases (A) that are contractually past due 90 days or more in the
         payment of principal and/or interest, (B) that are on nonaccrual
         status, (C) where a reasonable doubt exists, in the reasonable judgment
         of Target Bank or any other RCSB Subsidiary, as to the timely future
         collectibility of principal and/or interest, whether or not interest is
         still accruing or the loan is less than 90 days past due, (D) where the
         interest rate terms have been reduced and/or the maturity dates have
         been extended subsequent to the agreement under which the loan was
         originally created due to concerns regarding the borrower's ability to
         pay in accordance with such initial terms, (other than restructured
         loans that have ceased to be nonperforming in accordance with
         applicable regulatory guidelines and generally accepted accounting
         principles), (E) where a specific reserve allocation exists in
         connection therewith, or (F) that have been classified "Doubtful",
         "Loss" or the equivalent thereof by any regulatory authority, and (ii)
         all assets classified as REO and all other assets acquired through
         foreclosure or repossession.

         3.18 RCSB BENEFIT PLANS.

                  (a) Section 3.18 of the RCSB Disclosure Schedule contains a
         list (or, a description with respect to any oral employee benefit plan,
         practice, policy or arrangement), including all amendments thereto, of
         each compensation, consulting, employment, termination or collective
         bargaining agreement, and each stock option, stock purchase, stock
         appreciation right ("SAR"), restricted stock, stock equivalent ("Stock
         Equivalent"), life, health, accident or other insurance, bonus,
         deferred or incentive compensation, severance or separation agreement
         or any agreement providing any payment or benefit resulting from a
         change in control, profit sharing, retirement, or other employee
         benefit plan, practice, policy or arrangement of any kind, oral or
         written, covering any employee, former employee, director or former
         director of RCSB or any RCSB Subsidiary or his or her beneficiaries,
         including, but not limited to, any employee benefit plans within the
         meaning of Section 3(3) of ERISA, which RCSB or any RCSB Subsidiary
         maintains, to which RCSB or any RCSB Subsidiary contributes, or under
         which any employee, former employee, director or former director of
         RCSB or any RCSB Subsidiary is covered or has benefit rights and
         pursuant to which any liability of RCSB or any RCSB Subsidiary exists
         or is reasonably likely to occur (the "RCSB Benefit Plans"). Except as
         set forth in Section 3.18 of the RCSB Disclosure Schedule, RCSB and the
         RCSB Subsidiaries neither maintain nor have entered into any RCSB
         Benefit Plan or other document, plan or agreement which contains any
         change in control provisions which would cause an increase or
         acceleration of benefits or benefit entitlements to employees or former
         employees of RCSB or any RCSB Subsidiary or their respective
         beneficiaries, or other provisions, which would cause an increase in
         the liability of RCSB or any RCSB Subsidiary or to COFI or any COFI
         Subsidiary as a result of the transactions contemplated by this
         Agreement or any related action thereafter (a "Change in Control
         Benefit"). The term "RCSB Benefit Plans" as used herein refers to all
         plans contemplated under the preceding sentences of this Section 3.18,
         provided that the term "Plan" or "Plans" is used in this Agreement for
         convenience only and does not constitute an acknowledgment that a
         particular arrangement is an employee benefit plan within the meaning
         of Section 3(3) of ERISA. Except as disclosed in Section 3.18 of the
         RCSB Disclosure Schedule, no RCSB Benefit Plan is a multi-employer plan
         within the meaning of Section 3(37) of ERISA.

                  (b) Each of the RCSB Benefit Plans that is intended to be a
         pension, profit sharing, stock bonus, thrift, savings plan that is
         qualified under Section 401(a) of the Code ("RCSB Qualified Plans") has
         been determined by the Internal Revenue Service to qualify under
         Section 401(a) of the Code, or an application for determination of such
         qualification has been timely made to the Internal Revenue Service
         prior to the end of


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<PAGE>   115


         the applicable remedial amendment period under Section 401(b) of the
         Code (a copy of each such determination letter or pending application
         is included in Section 3.18 of the RCSB Disclosure Schedule) and, to
         the best of RCSB's knowledge, there exist no circumstances likely to
         adversely affect the qualified status of any such RCSB Qualified Plan.
         All such RCSB Qualified Plans established or maintained by RCSB or any
         of the RCSB Subsidiaries or to which RCSB or any of the RCSB
         Subsidiaries contribute are in compliance in all material respects with
         all applicable requirements of ERISA, and are in compliance in all
         material respects with all applicable requirements (including
         qualification and non-discrimination requirements ) of the Code for
         obtaining the tax benefits the Code thereupon permits with respect to
         such RCSB Qualified Plans. Neither RCSB nor any RCSB Subsidiary is a
         plan sponsor of, or contributes to, a defined benefit pension plan. All
         accrued contributions and other payments required to be made by RCSB or
         any RCSB Subsidiary to any RCSB Benefit Plan through November 30, 1996,
         have been made or reserves adequate for such purposes as of November
         30, 1996, have been set aside therefor and are reflected in the RCSB
         Financial Statements dated as of November 30, 1996. Neither RCSB nor
         any RCSB Subsidiary is in material default in performing any of its
         contractual obligations under any of the RCSB Benefit Plans or any
         related trust agreement or insurance contract, and there are no
         material outstanding liabilities of any such Plan other than
         liabilities for benefits to be paid to participants in such Plan and
         their beneficiaries in accordance with the terms of such Plan.

                  (c) There is no pending or, to the best knowledge of RCSB and
         Target Bank, threatened litigation or pending claim (other than routine
         benefit claims made in the ordinary course) by or on behalf of or
         against any of the RCSB Benefit Plans (or with respect to the
         administration of any such Plans) now or heretofore maintained by RCSB
         or any RCSB Subsidiary which allege violations of applicable state or
         federal law which are reasonably likely to result in a liability on the
         part of RCSB or any RCSB Subsidiary or any such Plan.

                  (d) RCSB and the RCSB Subsidiaries and all other person having
         fiduciary or other responsibilities or duties with respect to any RCSB
         Benefit Plan are and have since the inception of each such Plan been in
         substantial compliance with, and each such Plan is and has been
         operated in substantial accordance with, its provisions and in
         substantial compliance with the applicable laws, rules and regulations
         governing such Plan, including, without limitation, the rules and
         regulations promulgated by the Department of Labor, the PBGC and the
         Internal Revenue Service under ERISA, the Code or any other applicable
         law. Notwithstanding the foregoing, no representation is made with
         respect to compliance by a third party insurance company. No
         "reportable event" (as defined in Section 4043(b) of ERISA) has
         occurred with respect to any RCSB Benefit Plan. No RCSB Benefit Plan
         has engaged in or been a party to a "prohibited transaction" (as
         defined in Section 406 of ERISA or Section 4975(c) of the Code). All
         RCSB Benefit Plans that are group health plans have been operated in
         substantial compliance with the group health plan continuation
         requirements of Section 4980B of the Code and Section 601 of ERISA.

                  (e) Except as set forth in Section 3.18 of the RCSB Disclosure
         Schedule, neither RCSB nor any RCSB Subsidiary has made any payments,
         or is or has been a party to any agreement or any RCSB Benefit Plan,
         that under any circumstances could obligate it or its successor to make
         payments that are not or will not be deductible because of Sections
         162(m) or 280G of the Code.

                  (f) Section 3.18 of the RCSB Disclosure Schedule describes any
         obligation that RCSB or any RCSB Subsidiary has to provide health or
         welfare benefits to retirees or other former employees, directors or
         their dependents (other than rights under Section 4980B of the Code or
         Section 601 of ERISA), including information as to the number of
         retirees, other former employees or directors and dependents entitled
         to such coverage and their ages.

                  (g) Section 3.18 of the RCSB Disclosure Schedule lists: (i)
         each officer, employee and director of RCSB and any RCSB Subsidiary who
         is eligible to receive a Change in Control Benefit, showing the amount
         of each such Change in Control Benefit, the individual's participation
         in each bonus and other RCSB Benefit


                                      A-25
<PAGE>   116



         Plan, and such individual's compensation from RCSB and each RCSB
         Subsidiary for each of the calendar years 1992 through 1996 as reported
         by RCSB and a RCSB Subsidiary on Form W-2 or Form 1099; and (ii) a copy
         of each form of agreement relating to RCSB Stock Options, SARs and
         Stock Equivalents.

                  (h) RCSB and the RCSB Subsidiaries have filed or caused to be
         filed, and will continue to file or cause to be filed, in a timely
         manner all filings pertaining to each RCSB Benefit Plan with the
         Internal Revenue Service and the Department of Labor, as prescribed by
         the Code or ERISA, or regulations issued thereunder. All such filings,
         as amended, were complete and accurate in all material respects as of
         the dates of such filings. Notwithstanding the foregoing, no
         representation is made with respect to filings by a third party
         insurance company.

         3.19 COMPLIANCE WITH ENVIRONMENTAL LAWS.

                  (a) Except as set forth in Section 3.19 of the RCSB Disclosure
         Schedule: (i) to the best knowledge of RCSB and Target Bank, the
         operations of RCSB and each of the RCSB Subsidiaries comply in all
         material respects with all applicable past and present Environmental
         Laws; (ii) to the best knowledge of RCSB and Target Bank, none of the
         operations of RCSB or any RCSB Subsidiary, no assets presently or
         formerly owned or leased by RCSB or any RCSB Subsidiary and no
         Mortgaged Premises or Participating Facility are subject to any
         judicial or administrative proceedings alleging the violation of any
         past or present Environmental Law, nor are they the subject of any
         claims alleging damages to health or property, pursuant to which RCSB,
         any RCSB Subsidiary or any owner of a Mortgaged Premises or a
         Participating Facility would be liable in law or equity; (iii) none of
         the operations of RCSB or any RCSB Subsidiary, no assets presently
         owned or, to the best knowledge of RCSB and Target Bank, formerly owned
         by RCSB or any RCSB Subsidiary, and to the best knowledge of RCSB and
         Target Bank, no Mortgaged Premises or a Participating Facility are the
         subject of any federal, state or local investigation evaluating whether
         any remedial action is needed to respond to a release or threatened
         release of any Hazardous Substance, or any other substance into the
         environment, nor has RCSB or any RCSB Subsidiary, or, to the best
         knowledge of RCSB and Target Bank, any owner or a Mortgaged Premises or
         a Participating Facility been directed to conduct such investigation,
         formally or informally, by any governmental agency, nor have any of
         them agreed with any governmental agency or private person to conduct
         any such investigation; and (iv) neither RCSB nor any RCSB Subsidiary,
         nor, to the best knowledge of RCSB and Target Bank, any owner of a
         Mortgaged Premises or a Participating Facility has filed any notice
         under any Environmental Law indicating past or present treatment,
         storage or disposal of a Hazardous Substance or reporting a spill or
         release of a Hazardous Substance, or any other substance into the
         environment.

                  (b) With respect to the real property currently owned or, to
         the best knowledge of RCSB and Target Bank, formerly owned or currently
         leased by RCSB or any RCSB Subsidiary ("RCSB Premises"): (x) no part of
         the RCSB Premises has been used for the generation, manufacture,
         handling, storage, or disposal of Hazardous Substances; (y) except as
         disclosed in Section 3.19 of the RCSB Disclosure Schedule, the RCSB
         Premises do not contain, and have never contained, an underground
         storage tank; and (z) the RCSB Premises do not contain and are not
         contaminated by any quantity of a Hazardous Substance from any source.
         With respect to any underground storage tank listed in Section 3.19 of
         the RCSB Disclosure Statement as an exception to the foregoing, such
         underground storage tank has been removed in compliance with the
         Environmental Laws, and has not been the source of any release of a
         Hazardous Substance into the environment, unless otherwise set forth in
         Section 3.19 of the RCSB Disclosure Schedule.

         3.20 CONTRACTS AND COMMITMENTS. Section 3.20 of the RCSB Disclosure
Schedule contains, and shall be supplemented by RCSB and Target Bank, as
required by Section 5.10 hereof, so as to contain at the Closing Date true and
correct copies of each of the following documents:


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                  (a) a list of each outstanding loan agreement, mortgage,
         pledge agreement or other similar document or commitment to extend
         credit to any executive officer or director of RCSB or Target Bank;

                  (b) a list and description of each outstanding letter of
         credit and each commitment to issue a letter of credit in excess of
         $100,000 to which RCSB or any RCSB Subsidiary is a party and/or under
         which it may (contingently or otherwise) have any liability;

                  (c) a list of each vendor or lease contract or agreement (not
         otherwise included in the RCSB Disclosure Schedule or specifically
         excluded therefrom in accordance with the terms of this Agreement)
         involving goods, services or occupancy and which (i) does not expire
         within six months from the date hereof, (ii) cannot be terminated on
         thirty days (or less) written notice without penalty; and (iii)
         involves an annual expenditure by RCSB or any RCSB Subsidiary in excess
         of $100,000;

                  (d) a list of each contract or commitment (other than RCSB
         Permitted Liens as defined in Section 3.22(c)) hereof) affecting
         ownership of, title to, use of, or any interest in real property which
         is currently owned by RCSB or any RCSB Subsidiary, and a list and
         description of all real property owned (other than REO) or leased by
         RCSB or any RCSB Subsidiary;

                  (e) a list of each commitment made by RCSB or Target Bank to
         or with any of its executive officers or directors extending for a
         period of more than six months from the date hereof or providing for
         earlier termination only upon the payment of a penalty or equivalent
         thereto;

                  (f) the Certificate or Articles of Incorporation, Charters,
         and Bylaws of RCSB and each RCSB Subsidiary;

                  (g) except for powers of attorney executed in connection with
         loan servicing activities in the ordinary course of business, a list of
         all powers of attorney granted by RCSB or any RCSB Subsidiary which are
         currently in force and cannot be terminated by RCSB or any RCSB
         Subsidiary upon the issuance of a written notice of termination or
         revocation;

                  (h) a list of all policies of insurance currently maintained
         by RCSB or any RCSB Subsidiary and a list and description of all
         unsettled or outstanding claims of RCSB or any RCSB Subsidiary which
         have been, or to the best knowledge of RCSB and Target Bank, will be,
         filed with the companies providing insurance coverage for RCSB or any
         RCSB Subsidiary (except for routine claims for benefits);

                  (i) each collective bargaining agreement to which RCSB or any
         RCSB Subsidiary is a party and all affirmative action plans or programs
         covering employees of RCSB or any RCSB Subsidiary, as well as all
         employee handbooks, policy manuals, rules and standards of employment
         promulgated by RCSB or any RCSB Subsidiary;

                  (j) each lease or license with respect to real or personal
         property, whether as lessor, lessee, licensor or licensee, with annual
         rental or other payments due thereunder in excess of $100,000 to which
         RCSB or any RCSB Subsidiary is a party, which does not expire within
         six months from the date hereof and cannot be terminated upon thirty
         days (or less) written notice without penalty;

                  (k) all financial advisory, investment banking, and
         professional (legal and accounting) services contracts to which RCSB or
         any RCSB Subsidiary is a party; except those that may be terminated by
         RCSB or an RCSB Subsidiary at anytime without any liability;


                                      A-27
<PAGE>   118



                  (l) all judgments, orders, injunctions, court decrees or
         settlement agreements arising out of or relating to the labor and
         employment practices or decisions of RCSB or any RCSB Subsidiary which,
         by their terms, continue to bind or affect RCSB or any RCSB Subsidiary;

                  (m) all orders, decrees, memorandums, agreements or
         understandings with bank regulatory agencies binding upon or affecting
         the current operations of RCSB or any RCSB Subsidiary or any of their
         directors or officers in their capacities as such;

                  (n) all material trademarks, trade names, service marks,
         patents, or copyrights, whether registered or the subject of an
         application for registration, which are owned by RCSB or any RCSB
         Subsidiary or licensed from a third party;

                  (o) all policies formally adopted by the Board of Directors of
         RCSB or any RCSB Subsidiary as currently in effect with respect to
         environmental matters and copies of all policies that have been in
         effect during the last five (5) years regarding the performance of
         environmental investigations of properties accepted as collateral for
         loans, including the effective dates of all such policies;

                  (p) each agreement (other than those involving the sale or
         purchase of mortgage loans or servicing rights) to which RCSB or any
         RCSB Subsidiary is a party (which does not expire within six months
         from the date hereof and cannot be terminated upon thirty days (or
         less) written notice without penalty) which in an annual period could
         commit RCSB or any RCSB Subsidiary to an expenditure (either
         individually or through a series of installments) in excess of $100,000
         or which creates a material right or benefit to receive payments, goods
         or services not referred to elsewhere in this Section 3.20:

                  (q) each agreement containing any covenant limiting the right
         of RCSB or any RCSB Subsidiary to engage in any line of business or to
         compete with any person;

                  (r) each agreement with respect to any license, permit and
         similar matter that is necessary to the operations of RCSB or any RCSB
         Subsidiary; and

                  (s) each agreement that gives a third party any right to seek
         judicial or administrative relief to enjoin, or other relief which may
         prevent consummation of, the Merger.

         3.21 DEFAULTS. There has not been any default in any material
obligation to be performed by RCSB or any RCSB Subsidiary under any material
contract or commitment, and neither RCSB nor or any RCSB Subsidiary has waived,
and will not waive prior to the Effective Time, any material right under any
material contract or commitment. To the best knowledge of RCSB and Target Bank,
no other party to any material contract or commitment is in default in any
material obligation to be performed by such party.

         3.22 OPERATIONS SINCE NOVEMBER 30, 1996. Between November 30, 1996 and
the date hereof, except as set forth in Section 3.22 of the RCSB Disclosure
Schedule, there has not been:

                  (a) any increase in the compensation payable or to become
         payable by RCSB or any RCSB Subsidiary to any employee, officer or
         director, other than routine increases to employees consistent with
         past practices;

                  (b) except as permitted in Section 4.1(a) hereof, any payment
         of dividends or other distributions by RCSB to its stockholders or any
         redemption by RCSB of its capital stock;

                  (c) any mortgage, pledge or subjection to lien, charge or
         encumbrance of any kind of or on any asset, tangible or intangible, of
         RCSB or any RCSB Subsidiary, except the following (each of which,
         whether


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         arising before or after the date hereof, is herein referred to as a
         "RCSB Permitted Lien"): (i) liens arising out of judgments or awards in
         respect of which RCSB or any RCSB Subsidiary is in good faith
         prosecuting an appeal or proceeding for review and in respect of which
         it has secured a subsisting stay of execution pending such appeal of
         proceeding; (ii) liens for taxes, assessments, and other governmental
         charges or levies, the payment of which is not past due, or as to which
         RCSB or any RCSB Subsidiary is diligently contesting in good faith and
         by appropriate proceeding either the amount thereof or the liability
         therefor or both; (iii) deposits, liens or pledges to secure payments
         of worker's compensation, unemployment insurance, pensions, or other
         social security obligations, or the performance of bids, tenders,
         leases, contracts (other than contracts for the payment of money),
         public or statutory obligations, surety, stay or appeal bonds, or
         similar obligations arising in the ordinary course of business; (iv)
         zoning restrictions, easements, licenses and other restrictions on the
         use of real property or any interest therein, or minor irregularities
         in title thereto, which do not materially impair the use of such
         property or the merchantability or the value of such property or
         interest therein; (v) purchase money mortgages or other purchase money
         or vendor's liens or security interests (including, without limitation,
         finance leases), provided that no such mortgage, lien or security
         interest shall extend to or cover any other property of RCSB or any
         RCSB Subsidiary other than that so purchased; and (vi) pledges and
         liens given to secure deposits and other liabilities of RCSB or any
         RCSB Subsidiary arising in the ordinary course of business;

                  (d) any creation or assumption of indebtedness (including the
         extension or renewal of any existing indebtedness, or the increase
         thereof) by RCSB or any RCSB Subsidiary for borrowed money, or
         otherwise, other than in the ordinary course of business, none of which
         is in default;

                  (e) the establishment of any new, modification of or amendment
         to, or increase in the formula for contributions to or benefits under,
         any RCSB Benefit Plan by RCSB or any RCSB Subsidiary;

                  (f) any action by RCSB or any RCSB Subsidiary seeking any
         cancellation of, or decrease in the insured limit under, or increase in
         the deductible amount or the insured's retention (whether pursuant to
         coinsurance or otherwise) of or under, any policy of insurance
         maintained directly or indirectly by RCSB or any RCSB Subsidiary on any
         of their respective assets or businesses, including but not by way of
         limitation, fire and other hazard insurance on its assets, automobile
         liability insurance, general public liability insurance, and directors'
         and officers' liability insurance; and if an insurer takes any such
         action, RCSB shall promptly notify COFI;

                  (g) any change in RCSB's independent auditors, historic
         methods of accounting (other than as required by generally accepted
         accounting principles or regulatory accounting principles), or in its
         system for maintaining its equipment and real estate;

                  (h) any purchase, whether for cash or secured or unsecured
         obligations (including finance leases) by RCSB or any RCSB Subsidiary
         of any fixed asset which either (i) has a purchase price individually
         or in the aggregate in excess of $250,000 or (ii) is outside of the
         ordinary course of business;

                  (i) any sale or transfer of any asset in excess of $50,000 of
         RCSB or any RCSB Subsidiary or outside of the ordinary course of
         business with the exception of (A) loans and marketable securities that
         are held for sale and sold in the ordinary course of business at market
         prices, (B) mortgage servicing rights that are sold in the ordinary
         course of business at market prices, and (C) REO that is sold in the
         ordinary course of business;

                  (j) any cancellation or compromise of any debt to, claim by or
         right of, RCSB or any RCSB Subsidiary except in the ordinary course of
         business;


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                  (k) any amendment or termination of any contract or commitment
         to which RCSB or any RCSB Subsidiary is a party, other than in the
         ordinary course of business;

                  (l) any material damage or destruction to any assets or
         property of RCSB or any RCSB Subsidiary whether or not covered by
         insurance;

                  (m) any material change in the loan underwriting policies of
         any RCSB Subsidiary not reflected in the written policies previously
         provided by RCSB to COFI;

                  (n) any transaction of business or activity undertaken by RCSB
         or any RCSB Subsidiary outside the ordinary course of business
         consistent with past practices;

                  (o) any agreement or commitment to do any of the foregoing; or

                  (p) any event or condition, or series of events or conditions,
         of any character (other than changes in legal, economic or other
         conditions which are not specially or uniquely applicable to RCSB or
         any RCSB Subsidiary) which, individually or in the aggregate, has had
         or is reasonably likely to have a significant adverse impact on the
         business, operations or financial condition of RCSB on a consolidated
         basis.

         3.23 CORPORATE RECORDS. The corporate record books, transfer books and
stock ledgers of RCSB and each RCSB Subsidiary are complete and accurate in all
material respects and reflect all meetings, consents and other material actions
of the organizers, incorporators, stockholders, Boards of Directors and
committees of the Boards of Directors of RCSB and each such Subsidiary, and all
transactions in their respective capital stocks, since their respective
inceptions.

         3.24 UNDISCLOSED LIABILITIES. All of the Liabilities have, in the case
of RCSB and the RCSB Subsidiaries, been reflected, disclosed or reserved against
in the RCSB Financial Statements as of November 30, 1996 or in the notes
thereto, and RCSB and the RCSB Subsidiaries have no other Liabilities except (a)
Liabilities incurred since November 30, 1996 in the ordinary course of business
or (b) as disclosed in Section 3.24 of the RCSB Disclosure Schedule.

         3.25 ASSETS.

                  (a) RCSB and the RCSB Subsidiaries have good and marketable
         title to their real properties, including any leaseholds and ground
         leases, and their other assets and properties, all as reflected as
         owned or held by RCSB or any RCSB Subsidiary in the RCSB Financial
         Statements dated as of November 30, 1996, and those acquired since such
         date, except for (i) assets and properties disposed of since such date
         in the ordinary course of business and (ii) liens and encumbrances none
         of which, in the aggregate, except as set forth in the RCSB Financial
         Statements dated November 30, 1996 or in Section 3.25 of the RCSB
         Disclosure Schedule, are material to the assets of RCSB on a
         consolidated basis. All buildings, structures, fixtures and
         appurtenances comprising part of the real properties of RCSB and the
         RCSB Subsidiaries (whether owned or leased) are in good operating
         condition and have been well maintained, reasonable wear and tear
         excepted. Title to all real property owned by RCSB and the RCSB
         Subsidiaries is held in fee simple, except as otherwise noted in the
         RCSB Financial Statements as of November 30, 1996 or as set forth in
         Section 3.25 of the RCSB Disclosure Schedule. RCSB and the RCSB
         Subsidiaries have title or other rights to its assets sufficient in all
         material respect for the conduct of their respective businesses as
         presently conducted, and except as set forth in the RCSB Financial
         Statements dated as of November 30, 1996 or in Section 3.25 of the RCSB
         Disclosure Schedule, such assets are free, clear and discharged of and
         from any and all liens, charges, encumbrances, security interests
         and/or equities which are material to RCSB or any RCSB Subsidiary.

                  (b) All material leases pursuant to which RCSB or any RCSB
         Subsidiary, as lessee, leases real or personal property are, to the
         best knowledge of RCSB and Target Bank, valid, effective, and
         enforceable


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<PAGE>   121

         against the lessor in accordance with their respective terms. There is
         not under any of such leases any existing default, or any event which
         with notice or lapse of time or both would constitute a default, with
         respect to either RCSB or any RCSB Subsidiary, or to the best knowledge
         of RCSB and Target Bank, the other party. Except as disclosed in
         Section 3.25 of the RCSB Disclosure Schedule, none of such leases
         contains a prohibition against assignment by RCSB or any RCSB
         Subsidiary, by operation of law or otherwise, or any other provision
         which would preclude the surviving corporation or resulting institution
         or any RCSB Subsidiary from possessing and using the leased premises
         for the same purposes and upon the same rental and other terms upon the
         consummation of the Merger as are applicable to the use by RCSB or any
         RCSB Subsidiary as of the date of this Agreement.

         3.26 INDEMNIFICATION. To the best knowledge of RCSB and Target Bank,
except as set forth in Section 3.26 of the RCSB Disclosure Schedule, no action
or failure to take action by any director, officer, employee or agent of RCSB or
any RCSB Subsidiary has occurred which would give rise to a claim or a potential
claim by any such person for indemnification from RCSB or any RCSB Subsidiary
under the corporate indemnification provisions of RCSB or any RCSB Subsidiary.

         3.27 INSIDER INTERESTS. All outstanding loans and other contractual
arrangements (including deposit relationships) between RCSB or any RCSB
Subsidiary and any officer, director or employee of RCSB or any RCSB Subsidiary
conform to the applicable rules and regulations and requirements of all
applicable regulatory agencies which were in effect when such loans and other
contractual arrangements were entered into. Except as set forth in Section 3.27
of the RCSB Disclosure Schedule, no officer, director or employee of RCSB or any
RCSB Subsidiary has any material interest in any property, real or personal,
tangible or intangible, used in or pertaining to the business of RCSB or any
RCSB Subsidiary.

         3.28 REGISTRATION OBLIGATIONS. Except as set forth in Section 3.28 of
the RCSB Disclosure Schedule, neither RCSB nor any RCSB Subsidiary is under any
obligation, contingent or otherwise, which will survive the Effective Time by
reason of any agreement to register any of its securities under the Securities
Act or other federal or state securities laws or regulations.

         3.29 REGULATORY, TAX AND ACCOUNTING MATTERS. RCSB and Target Bank have
not taken or agreed to take any action, nor does it have knowledge of any fact
or circumstance, that would (i) materially impede or delay the consummation of
the transactions contemplated by this Agreement or the ability of the parties to
obtain any approval of any regulatory authority required for the transactions
contemplated by this Agreement or to perform their covenants and agreements
under this Agreement or (ii) prevent the Merger from qualifying as a pooling of
interests for accounting purposes or the Merger from qualifying as a
reorganization within the meaning of Section 368(a) of the Code.

         3.30 BROKERS AND FINDERS. Except as set forth in the agreement with
Lehman Brothers, dated April 30, 1997 (which agreement has not been amended
since such date), a copy of which has previously been provided to COFI, neither
RCSB nor any RCSB Subsidiary nor any of their respective officers, directors or
employees has employed any broker or finder or incurred any liability for any
financial advisory fees, brokerage fees, commissions or finder's fees, and no
other broker or finder has acted directly or indirectly for RCSB or any RCSB
Subsidiary in connection with this Agreement or the transactions contemplated
hereby. Section 3.30 of the RCSB Disclosure Schedule sets forth bona fide
estimates of the amounts of all fees and expenses to be paid by RCSB to all
third parties in connection with this Agreement and the transactions
contemplated hereby.

         3.31 ACCURACY OF INFORMATION. The statements of RCSB and Target Bank
contained in this Agreement, the Schedules hereto and any other written document
executed and delivered by or on behalf of RCSB or Target Bank pursuant to the
terms of this Agreement are true and correct in all material respects.


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<PAGE>   122



         3.32 FAIRNESS OPINION. RCSB has received from Lehman Brothers a
fairness opinion, dated as of the date of this Agreement, to the effect that the
Merger Consideration to be received by the holders of RCSB Common Stock pursuant
to this Agreement and the Company Merger is fair to such holders from a
financial point of view.

         3.33 GOVERNMENTAL APPROVALS AND OTHER CONDITIONS. To the knowledge of
RCSB and Target Bank, there is no reason relating specifically to RCSB or any of
its Subsidiaries why (a) the approvals that are required to be obtained from
regulatory authorities having approval authority in connection with the
transactions contemplated hereby should not be granted, (b) such regulatory
approvals should be subject to a condition which would differ from conditions
customarily imposed by such regulatory authorities in orders approving
acquisitions of the type contemplated hereby or (c) any of the conditions
precedent as specified in Article VI hereof to the obligations of any of the
parties hereto to consummate the transactions contemplated hereby are unlikely
to be fulfilled within the applicable time period or periods required for
satisfaction of such condition or conditions.

                                   ARTICLE IV

                                    COVENANTS

         4.1 COVENANTS OF RCSB AND TARGET BANK.

                  (a) Without the prior written consent of COFI, RCSB shall not
         declare or pay any dividend or make any other distribution with respect
         to its capital stock whether in cash, stock or other property, after
         the date of this Agreement, except it may declare and pay its regular
         quarterly cash dividend of not more than $.15 per share on RCSB Common
         Stock; provided the declaration of the last dividend by RCSB prior to
         consummation of the Company Merger and the payment thereof shall be
         coordinated with, and subject to the approval of COFI, so as to
         preclude any duplication of dividend benefit.

                  (b) Except as specifically contemplated by this Agreement,
         RCSB and the RCSB Subsidiaries shall continue to carry on, after the
         date hereof, their respective businesses and the discharge or incurring
         of obligations and liabilities, only in the usual, regular and ordinary
         course of business, as heretofore conducted, and in substantial
         compliance with their existing business plan, a copy of which has been
         heretofore delivered by RCSB to COFI (the "1997 RCSB Business Plan"),
         and by way of amplification and not limitation, RCSB and each of the
         RCSB Subsidiaries will not, without the prior written consent of COFI
         (which consent in the case of subparts (vi), (vii) and (xxii) shall not
         be unreasonably withheld or delayed):

                           (i) issue any capital stock or any options, warrants,
                  or other rights to subscribe for or purchase capital stock or
                  any securities convertible into or exchangeable for any
                  capital stock, or any SARs or Stock Equivalents, except
                  pursuant to the RCSB Stock Options outstanding on the date
                  hereof (including those stock options that are required to be
                  granted to non-employee directors on May 28, 1997 under the
                  1992 Option Plan) and the Stock Option Agreement;

                           (ii) directly or indirectly redeem, purchase or
                  otherwise acquire any capital stock or ownership interests of
                  RCSB or any of the RCSB Subsidiaries;

                           (iii) effect a reclassification, recapitalization,
                  split-up, exchange of shares, readjustment or other similar
                  change in or to any capital stock or otherwise reorganize or
                  recapitalize;

                           (iv) change its Charter, Certificate or Articles of
                  Incorporation or Bylaws;

                           (v) enter into or modify any employment agreement,
                  severance agreement, change in control agreement, or plan
                  relative to the foregoing; or grant any increase (other than
                  ordinary and normal increases to employees (excluding
                  executive officers of RCSB and Target Bank) consistent


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                  with past practices) in the compensation payable or to become
                  payable to directors, officers or employees except as required
                  by law, pay or agree to pay any bonus, or adopt or make any
                  change in any bonus, insurance, pension, or other RCSB Benefit
                  Plan;

                           (vi) except for the short-term renewal of Federal
                  Home Loan Bank ("FHLB") advances outstanding at the date of
                  this Agreement, raising funds against its existing line of
                  credit with the FHLB for durations not in excess of 3 years,
                  and deposit-taking and repurchase transactions in the ordinary
                  course of its business, borrow or agree to borrow any funds or
                  indirectly guarantee or agree to guarantee any obligations of
                  others;

                           (vii) except in the ordinary course of business
                  consistent with prior practice, change the pricing or
                  methodology for pricing any of its loan products;

                           (viii) make any material changes in its policies
                  concerning loan underwriting or which persons may approve any
                  significant or material loan;

                           (ix) enter into any securities transaction for its
                  own account or purchase or otherwise acquire any investment
                  security for its own account other than U.S. Treasury
                  obligations with maturities of less than one year and deposits
                  in an overnight account at the FHLB of New York, provided
                  COFI's consent shall not be unreasonably withheld or delayed
                  relating to the purchase of other readily marketable
                  investment securities;

                           (x) increase or decrease the rate of interest paid on
                  time deposits or on certificates of deposit, except in a
                  manner and pursuant to policies consistent with past
                  practices;

                           (xi) enter into, modify or extend any agreement,
                  contract or commitment out of the ordinary course of business
                  or having a term in excess of six months and involving an
                  expenditure in excess of $50,000, other than letters of
                  credit, loan agreements, deposit agreements, and other
                  lending, credit and deposit documents made in the ordinary
                  course of business;

                           (xii) except in the ordinary course of business and
                  in substantial compliance with the 1997 RCSB Business Plan,
                  place on any of its assets or properties any mortgage, pledge,
                  lien, charge, or other encumbrance;

                           (xiii) cancel any material indebtedness owing to it
                  or any claims which it may possess or waive any rights of
                  material value;

                           (xiv) sell or otherwise dispose of any real property
                  or any material amount of tangible or intangible personal
                  property, except in the ordinary course of business consistent
                  with past practices;

                           (xv) foreclose upon or otherwise take title to or
                  possession or control of any real property without first
                  obtaining a phase one environmental report thereon; provided,
                  however, that Target Bank and its Subsidiaries shall not be
                  required to obtain such a report with respect to single
                  family, non-agricultural residential property of one acre or
                  less to be foreclosed upon unless it has reason to believe
                  that such property might contain Hazardous Substances;

                           (xvi) knowingly or wilfully commit any act or fail to
                  commit any act which will cause a material breach of any
                  material agreement, contract or commitment;


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<PAGE>   124



                           (xvii) knowingly or wilfully violate any law,
                  statute, rule, governmental regulation, or order in any
                  material respect;

                           (xviii) purchase any fixed asset where the amount
                  paid or committed therefor is in excess of $50,000, except for
                  written commitments outstanding on or prior to May 15, 1997;

                           (xix) engage in any activity or transaction(s) that
                  could result in the consolidated loan servicing assets of RCSB
                  and the RCSB Subsidiaries to exceed $130,000,000;

                           (xx) except as permitted under subpart (xxi)
                  immediately below, enter into or acquire any derivatives
                  contract or structured note;

                           (xxi) except in connection with hedging activities
                  consistent with past practices pertaining to residential first
                  mortgage loan originations, enter into any new, or modify,
                  amend or extend the terms of any existing contracts relating
                  to the purchase or sale of financial or other futures, or any
                  put or call option relating to cash, securities or commodities
                  or any interest rate swap agreements or other agreements
                  relating to the hedging of interest rate risk;

                           (xxii) in the case of Target Bank, (A)voluntarily
                  make any material changes in or to its asset or deposit mix
                  other than those contemplated by the 1997 RCSB Business Plan,
                  (B) voluntarily convert any Community Value checking account
                  to any other type of checking account, (C) open any new
                  branch, deposit taking facility or loan production office
                  other than the two new offices currently in construction, (D)
                  close any existing branch or other facility, or (E) incur any
                  liability or obligation relating to retail banking and branch
                  merchandising, marketing and advertising activities and
                  initiatives in excess of the amounts budgeted in the 1997 RCSB
                  Business Plan;

                           (xxiii) in the case of the RCSB Subsidiaries (other
                  than Target Bank), (A) open any sales, hub or other type of
                  office or facility or (B) hire any additional employees except
                  to fill current job vacancies and future vacancies arising
                  from attrition; or

                           (xxiv) agree in writing or otherwise to take any of
                  the foregoing actions or engage in any of the foregoing
                  activities.

                  (c) During the period commencing July 1, 1997, and ending the
         last day of the calendar month coinciding with or immediately preceding
         the Closing Date, RCSB and the RCSB Subsidiaries shall cause units with
         a Fair Issac Corporation Auto Score (as calculated by the RCSB
         Subsidiary based on maker or co-maker in its reports prepared in the
         ordinary course of business consistent with past practice) of 599 or
         less not to exceed 8% of the total auto unit production originated by
         RCSB and the RCSB Subsidiaries during such period on a consolidated
         basis.

                  (d) RCSB will, and will cause the RCSB Subsidiaries to, use
         their reasonable efforts to maintain their respective properties and
         assets in their present state of repair, order and condition,
         reasonable wear and tear excepted, and to maintain and keep in full
         force and effect all policies of insurance presently in effect,
         including in the case of Target Bank insurance of accounts with the
         FDIC. RCSB will, and will cause the RCSB Subsidiaries to, take all
         requisite action (including without limitation the making of claims and
         the giving of notices) pursuant to its directors' and officers'
         liability insurance policy or policies in order to preserve all rights
         thereunder with respect to all matters which could reasonably give rise
         to a claim prior to the Effective Time.

                  (e) RCSB shall promptly notify COFI in writing of the
         occurrence of any matter or event known to and directly involving RCSB
         or any RCSB Subsidiary that is reasonably likely to result in a
         Material


                                      A-34
<PAGE>   125



         Adverse Effect on RCSB or impair the ability of RCSB or Target Bank to
         consummate the transactions contemplated herein.

                  (f) RCSB shall provide to COFI such reports on litigation
         involving RCSB and each of the RCSB Subsidiaries as COFI shall
         reasonably request, provided that RCSB shall not be required to divulge
         information to the extent that, in the good faith opinion of its
         counsel, by doing so, it would risk waiver of the attorney-client
         privilege to its detriment.

                  (g) Neither RCSB (nor any of its Subsidiaries) (i) shall
         solicit, initiate, participate in discussions of, or encourage or take
         any other action to facilitate (including by way of the disclosing or
         furnishing of any information that it is not legally obligated to
         disclose or furnish) any inquiry or the making of any proposal relating
         to any Acquisition Transaction (as defined below) or a potential
         Acquisition Transaction with respect to itself or any of its
         Subsidiaries or (ii) shall (A) solicit, initiate, participate in
         discussions of, or encourage or take any other action to facilitate any
         inquiry or proposal, or (B) enter into any agreement, arrangement, or
         understanding (whether written or oral) regarding any proposal or
         transaction providing for or requiring it to abandon, terminate or fail
         to consummate this Agreement, or compensating it or any of its
         Subsidiaries under any of the instances described in this clause. RCSB
         and Target Bank shall immediately instruct and otherwise use their best
         efforts to cause their directors, officers, employees, agents, advisors
         (including, without limitation, any investment banker, attorney, or
         accountant retained by it or any of its Subsidiaries), consultants and
         other representatives to comply with such prohibitions. RCSB and Target
         Bank shall immediately cease and cause to be terminated any existing
         activities, discussions, or negotiations with any parties conducted
         heretofore with respect to such activities. Notwithstanding the
         foregoing, RCSB may provide information at the request of or enter into
         negotiations with a third party with respect to an Acquisition
         Transaction if the Board of Directors of RCSB determines, in good faith
         after consultation with counsel, that the exercise of its fiduciary
         duties to RCSB's stockholders under applicable law requires it to take
         such action, and, provided further, that RCSB may not, in any event,
         provide to such third party any information which it has not provided
         to COFI. RCSB shall promptly notify COFI orally and in writing in the
         event it receives any such inquiry or proposal and shall provide
         reasonable detail of all relevant facts relating to such inquiries.
         This Section shall not prohibit accurate disclosure by RCSB in any
         document (including the Joint Proxy Statement and the Registration
         Statement) or other disclosure under applicable law if in the opinion
         of the Board of Directors of RCSB, disclosure is appropriate under
         applicable law. "Acquisition Transaction" shall, with respect to RCSB,
         mean any of the following (other than the Merger): (i) a merger or
         consolidation, or any similar transaction of any company with either
         RCSB or any Subsidiary of RCSB, (ii) a purchase, lease or other
         acquisition of a material portion of all the assets of either RCSB or
         any Subsidiary of RCSB, (iii) a purchase or other acquisition of
         "beneficial ownership" by any "person" or "group" (as such terms are
         defined in Section 13(d)(3) of the Exchange Act) (including by way of
         merger, consolidation, share exchange, or otherwise) which would cause
         such person or group to become the beneficial owner of securities
         representing 10% or more of the voting power of either RCSB or any
         Subsidiary of RCSB, (iv) a tender or exchange offer to acquire
         securities representing 19.9% or more of the voting power of RCSB, (v)
         a public proxy or consent solicitation made to stockholders of RCSB
         seeking proxies in opposition to any proposal relating to any of the
         transactions contemplated by this Agreement, (vi) the filing of an
         application or notice with the OTS, the Department, or any other
         federal or state regulatory authority (which application has been
         accepted for processing) seeking approval to engage in one or more of
         the transactions referenced in clauses (i) through (iv) above, or (vii)
         the making of a bona fide offer to the Board of Directors of RCSB or
         Target Bank by written communication, that is or becomes the subject of
         public disclosure, to engage in one or more of the transactions
         referenced in clauses (i) through (v) above.

                  (h) At the request of COFI, Target Bank agrees immediately
         prior to Closing and after satisfaction or waiver of the conditions to
         Closing set forth in Article VI hereof, to establish and take such
         reserves and accruals as COFI reasonably shall request to conform
         Target Bank's loan, accrual, reserve and other accounting policies to
         the policies of Charter One Bank, provided however, such requested
         conforming


                                      A-35
<PAGE>   126



         adjustments shall not be taken into account in determining whether RCSB
         has experienced a Material Adverse Effect.

         4.2 MUTUAL COVENANTS. No party to this Agreement shall voluntarily take
any action that would (A) materially impede or delay the consummation of the
transactions contemplated by this Agreement or the ability of the parties hereto
to obtain any approval of any regulatory authority required for the transactions
contemplated by this Agreement or to perform its covenants and agreements under
this Agreement or (B) prevent the Merger from qualifying as a pooling of
interests for accounting purposes or as a reorganization within the meaning of
Section 368(a) of the Code. The exercise by COFI of its rights under the Stock
Option Agreement shall not be deemed a violation of this Section or a breach of
any representation made by COFI under this Agreement.

                                    ARTICLE V

                              ADDITIONAL AGREEMENTS

         5.1 INSPECTION OF RECORDS; CONFIDENTIALITY.

                  (a) COFI and RCSB shall each afford to the other and to the
         other's accountants, counsel and other representatives (and their
         Subsidiaries) full access during normal business hours during the
         period prior to the Effective Time to all of their respective
         properties, books, contracts, commitments and records, including all
         attorneys' responses to auditors' requests for information, and
         accountants' work papers, developed by either of them or their
         respective Subsidiaries or their respective accountants or attorneys,
         and will permit each other and their respective representatives to
         discuss such information directly with each other's officers,
         directors, employees, attorneys and accountants. COFI and RCSB shall
         each use their best efforts to furnish to the other all other
         information concerning its business, properties and personnel as such
         other party may reasonably request. Any failure to comply with this
         covenant shall be disregarded if promptly corrected without material
         adverse consequences to the other party. The availability or actual
         delivery of information shall not affect the representations,
         warranties, covenants, and agreements of the party providing such
         information that are contained in this Agreement or in any certificates
         or other documents delivered pursuant hereto.

                  (b) All information disclosed by any party to any other party
         to this Agreement, whether prior or subsequent to the date of this
         Agreement including, without limitation, any information obtained
         pursuant to this Section 5.1, shall be kept confidential by such other
         party and shall not be used by such other party otherwise as herein
         contemplated. In the event that this Agreement is terminated, each
         party shall return all documents furnished hereunder, shall destroy all
         documents or portions thereof prepared by such other party that contain
         information furnished by another party pursuant hereto and, in any
         event, shall hold all information confidential unless or until such
         information is or becomes a matter of public knowledge.

         5.2 REGISTRATION STATEMENT; STOCKHOLDER APPROVAL. As soon as
practicable after the date hereof, COFI shall file the Registration Statement
with the SEC, and RCSB and COFI shall use their best efforts to cause the
Registration Statement to become effective under the Securities Act. COFI will
take any action required to be taken under the applicable blue sky or securities
laws in connection with the issuance of the shares of COFI Common Stock in the
Company Merger. Each party shall furnish all information concerning it and the
holders of its capital stock as the other party may reasonably request in
connection with such action. Each of COFI and RCSB shall call a meeting of its
stockholders as soon as practicable after the Registration Statement is declared
effective by the SEC for the purpose of voting upon this Agreement and the
Company Merger and shall schedule such meeting based on consultation with the
other party. In connection with said stockholders' meetings, (i) COFI and RCSB
shall jointly prepare the Joint Proxy Statement as part of the Registration
Statement and they shall mail the Joint Proxy Statement to their respective
stockholders and (ii) the Board of Directors of COFI and RCSB shall recommend to
their respective stockholders the approval of this Agreement and the Company
Merger; provided, however, that such recommendation may be withdrawn, modified,
or amended, or not made at all, after the receipt by RCSB of an offer to effect
an Acquisition


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Transaction (as defined in Section 4.1(g) hereof) with RCSB to the extent the
Board of Directors of RCSB reasonably determines that, in the exercise of its
fiduciary obligations after consultation with counsel, it has a duty to do so.

         5.3 AGREEMENTS OF AFFILIATES. As soon as practicable after the date of
this Agreement, RCSB shall deliver to COFI a letter, reviewed by its counsel,
identifying all persons whom RCSB believes to be "affiliates" of RCSB for
purposes of Rule 145 under the Securities Act or for purposes of qualifying for
pooling of interests accounting treatment for the Merger. RCSB shall use its
best efforts to cause each person who is so identified as an "affiliate" to
deliver to COFI, as soon as practicable thereafter, a written agreement,
substantially in the form of Exhibit E, providing that from the date of such
agreement each such person will agree not to sell, pledge, transfer or otherwise
dispose of any shares of stock of RCSB held by such person or any shares of COFI
Common Stock to be received by such person in the Company Merger (i) during the
period commencing 30 days prior to the Company Merger and ending at the time of
publication of financial results covering at least 30 days of combined
operations after the Company Merger and (ii) at any time, except in compliance
with the applicable provisions of the Securities Act and other applicable laws
and regulations. Prior to the Effective Time, RCSB shall amend and supplement
such letter and use its best efforts to cause each additional person who is
identified as an "affiliate" to execute a written agreement as set forth in this
Section 5.3. COFI shall deliver to RCSB within five (5) business days after the
date hereof a certified copy of the minutes of a meeting of the Board of
Directors of COFI at which the restrictions on resales of COFI Common Stock
under the pooling of interests method of accounting rules were discussed.

         5.4 EXPENSES. Each party hereto shall bear its own expenses incident to
preparing, entering into and carrying out this Agreement and to consummating the
Merger.

         5.5 COOPERATION. Each party agrees that it will use its best efforts to
bring about the transactions contemplated by this Agreement as soon as
practicable, unless this Agreement is terminated as provided herein. Subject to
the terms and conditions herein provided, each of the parties hereto agrees to
use all reasonable efforts to take, or cause to be taken, all action, and to do,
or cause to be done, all things necessary, proper or advisable under applicable
laws and regulations to consummate and make effective the transactions
contemplated by this Agreement at the earliest practicable time. In case at any
time after the Effective Time any further action is necessary or desirable to
carry out the purposes of this Agreement, the proper officers and/or directors
of the parties, shall take all such necessary action. Each party shall use its
reasonable best efforts to preserve for itself and the other parties hereto each
available legal privilege with respect to the confidentiality of their
negotiations and related communications, including the attorney-client
privilege.

         5.6 REGULATORY APPLICATIONS. The parties shall, as soon as practicable
after the date of this Agreement, file all necessary applications with all
applicable regulatory authorities, and shall use their best efforts to respond
as promptly as practicable to all inquiries received concerning said
applications. In the event the Merger is challenged or opposed by any
administrative or legal proceeding, whether by the United States Department of
Justice or otherwise, the determination of whether and to what extent to seek
appeal or review, administrative or otherwise, or other appropriate remedies
shall be made by COFI after consultation with RCSB. The party filing an
application shall deliver a copy thereof to the other parties hereto in advance
of filing and copies of all responses from or written communications from
regulatory authorities relating to the Merger or this Agreement (to the extent
permitted by law), and the filing party shall also deliver a final copy of each
regulatory application to the other parties promptly after it is filed with the
appropriate regulatory authority. Each party shall advise the other parties
periodically of the status of each regulatory application.

         5.7 FINANCIAL STATEMENTS AND REPORTS. From the date of this Agreement
and prior to the Effective Time: (a) RCSB will deliver to COFI not later than
forty-five (45) days after the end of any calendar quarter, the Report of
Condition and Income filed by Target Bank with the Department and FDIC; (b) COFI
and RCSB shall deliver to each other not later than forty-five (45) days after
the end of each fiscal quarter, its Report on Form 10-Q for such quarter as
filed with the SEC which shall be prepared in conformity with generally accepted
accounting principles and the rules and regulations of the SEC; and (c) each
party will deliver to the others any and all other material reports filed with
the


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SEC, FDIC, OTS, Department or any other regulatory agency within five (5)
business days of the filing of any such report.

         5.8 NOTICE. At all times prior to the Effective Time, each party shall
promptly notify the others in writing of the occurrence of any event which will
or may result in the failure to satisfy any of the conditions specified in
Sections 6.1 or 6.2 hereof. In the event that any party becomes aware of the
occurrence or impending occurrence of any event which would constitute or cause
a breach by it of any of its representations and warranties, covenants or
agreements herein in any material respect, or would have constituted or caused a
breach by it of its representations and warranties, covenants or agreements
herein in any respect, had such an event occurred or been known prior to the
date hereof, said party shall immediately give detailed and written notice
thereof to the other parties, and shall, unless the same has been waived in
writing by the other parties, use its reasonable efforts to remedy the same
within 30 days, provided that such efforts, if not successful, shall not be
deemed to satisfy any condition precedent to the Merger.

         5.9 PRESS RELEASE. Except as provided in Section 4.1(g) or as otherwise
reasonably determined by a party to comply with its legal obligations, at all
times prior to the Effective Time, the parties shall mutually agree to the
issuance of any press release or other information to the press or any third
party for general circulation with respect to this Agreement or the transactions
contemplated hereby.

         5.10 DELIVERY OF SUPPLEMENTS TO DISCLOSURE SCHEDULES. Five business
days prior to the Effective Time, each party will supplement or amend its
Disclosure Schedule with respect to any matter hereafter arising which, if
existing or occurring at or prior to the date of this Agreement, would have been
required to be set forth or described in such Disclosure Schedule or which is
necessary to correct any information in the Disclosure Schedule or in any
representation and warranty made by the disclosing party which has been rendered
inaccurate thereby. For purposes of determining the accuracy of the
representations and warranties of COFI and Charter One Bank, and RCSB and Target
Bank contained, respectively, in Articles II and III hereof in order to
determine the fulfillment of the conditions set forth in Section 6.1(a) and
6.2(a) hereof as of the date of this Agreement, the Disclosure Schedule of each
party shall be deemed to include only that information contained therein on the
date it is initially delivered to the other party together with any nonmaterial
information that was inadvertently left out of a party's Disclosure Schedule as
initially delivered and is subsequently provided in writing as soon as
practicable after the omission is discovered by the disclosing party.

         5.11 LITIGATION MATTERS. RCSB and Target Bank will consult with COFI
about any proposed settlement, or any disposition of, any litigation involving
settlement amounts in excess of $50,000.

         5.12 TAX OPINION. COFI agrees to obtain a written opinion of Silver,
Freedman & Taff, L.L.P., addressed to COFI and RCSB, dated the Closing Date,
subject to the representations and assumptions referred to therein, and
substantially to the effect that the Company Merger will constitute a tax-free
reorganization within the meaning of Section 368(a) of the Code and that COFI,
Charter Michigan and RCSB will each be a party to a reorganization.

         5.13 CONTINUING EMPLOYEES. To the extent permitted by applicable law,
the former employees of RCSB and RCSB Subsidiaries who become employees of
Charter One Bank or any other COFI Subsidiary (the "Continuing Employees") shall
continue to participate in the RCSB Benefit Plans, except where any such Plan is
terminated at request of COFI prior to or at the Effective Time. At or after the
Effective Time, COFI may merge any RCSB Benefit Plan with and into an COFI
Benefit Plan or merge an COFI Benefit Plan with and into an RCSB Benefit Plan.
At or after the Effective Time, COFI or any COFI Subsidiary may amend or
terminate any RCSB Benefit Plan, provided, that if the termination or amendment
adversely affects the benefits provided to the Continuing Employees, Charter One
Bank or another COFI Subsidiary shall provide the Continuing Employees with
benefits that are substantially equivalent to the benefits being received by
other similarly situated employees of Charter One Bank or such other COFI
Subsidiary under comparable plans then in effect, if any. Whenever a Continuing
Employee becomes a participant in an COFI Benefit Plan, such Continuing Employee
shall receive full credit for his past service with RCSB or any RCSB Subsidiary
for purposes of determining eligibility to participate in and the vesting of
benefits under such COFI Benefit Plan (but not for the purpose of accrual of
benefits thereunder). Continuing Employees will not be subject to any exclusion
or


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penalty for pre-existing conditions that were covered under the RCSB health plan
immediately prior to the Effective Time or any waiting period relating to
coverage under the COFI health plan.

         5.14 RESERVATION OF SHARES TO SATISFY RCSB STOCK OPTIONS. COFI shall
take all corporate action necessary to reserve for issuance a sufficient number
of shares of COFI Common Stock for delivery upon exercise of RCSB Stock Options
assumed by it in accordance with Section 1.3(e) hereof. As soon as practicable
after the Effective Time, COFI shall file an appropriate registration statement
with respect to the shares of COFI Common Stock subject to such options and
shall use its best efforts to maintain the effectiveness of such registration
statement or registration statements (and maintain the current status of the
prospectus or prospectuses contained therein) for so long as such options remain
outstanding.

         5.15 NASDAQ LISTING. COFI shall use all reasonable efforts to cause the
shares of COFI Common Stock to be issued in the Company Merger, and the shares
of COFI Common Stock to be reserved for issuance upon exercise of RCSB Stock
Options, to be approved for listing on the Nasdaq Stock Market (or such other
national securities exchange or stock market on which the COFI Common Stock
shall then be traded), subject to official notice of issuance, prior to or as of
the Closing.

         5.16 DIRECTORS' AND OFFICERS' INDEMNIFICATION INSURANCE. For a period
of six years following the Effective Time, COFI shall indemnify, defend and hold
harmless the present and former directors, officers and employees of RCSB and
the RCSB Subsidiaries (each, an "Indemnified Party") against all costs or
expenses (including reasonable attorneys' fees), judgments, fines, losses,
claims, damages or liabilities incurred in connection with any claim, action,
suit, proceeding or investigation, whether civil, criminal, administrative or
investigative, and arising out of matters existing or occurring at or prior to
the Effective Time (including the transactions contemplated by this Agreement
and the agreements executed pursuant to this Agreement), whether asserted or
claimed prior to, at or after the Effective Time, to the fullest extent that
RCSB would have been permitted under Delaware law and its Certificate of
Incorporation or Bylaws in effect on the date of this Agreement to indemnify
such person (and COFI will also advance expenses as incurred to the fullest
extent permitted under applicable law so long as the person to whom expenses are
advanced provides an undertaking to repay such advances if it is ultimately
determined that such person is not entitled to indemnification); PROVIDED
HOWEVER, that (a) any determination required to be made with respect to whether
a person's conduct complies with the standards set forth under Delaware law and
RCSB's Certificate of Incorporation and Bylaws shall be made by independent
counsel mutually agreed upon between COFI and the Indemnified Party, and (b)
COFI shall be obligated pursuant to this Section 5.16 to pay for only one firm
of counsel for all Indemnified Parties, unless an Indemnified Party shall have
reasonably concluded, based on the advice of counsel, that in order to be
adequately represented, separate counsel is necessary for such Indemnified
Party, in which case COFI shall be obligated to pay for such separate counsel.
COFI shall cause the persons serving as officers and directors of RCSB and the
RCSB Subsidiaries immediately prior to the Effective Time to be covered for a
period of six years following the Effective Time by the directors' and officers'
liability insurance policy maintained by COFI and Charter One Bank (provided
that COFI may substitute or cause RCSB to substitute therefor single premium
tail coverage with a policy limit equal to RCSB's existing annual coverage
limit) with respect to acts or omissions occurring prior to the Effective Time
which were committed by such officers and directors in their capacity as such,
provided that the additional premium cost to COFI does not exceed 200% of RCSB's
present annual premium cost (the "Maximum Amount") and that the insurance is
available. If the amount of the premium necessary to maintain or procure such
coverage exceeds the Maximum Amount, COFI shall use all reasonable efforts to
maintain the most advantageous policies of directors' and officers' insurance
obtainable for a premium equal to the Maximum Amount.

         5.17. EXTRAORDINARY COFI DIVIDENDS. Between the date of this Agreement
and the Effective Time or the termination of this Agreement (whichever occurs
first), COFI shall not declare, set aside or pay any extraordinary dividend or
make any other extraordinary distribution (other than a stock dividend) with
respect to COFI Common Stock.


                                      A-39
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                                   ARTICLE VI

                                   CONDITIONS

         6.1 CONDITIONS TO THE OBLIGATIONS OF COFI, CHARTER MICHIGAN AND CHARTER
ONE BANK. Notwithstanding any other provision of this Agreement, the obligations
of COFI, Charter Michigan and Charter One Bank to consummate the Merger are
subject to the following conditions precedent (except as to those which COFI may
chose to waive):

                  (a) subject to the cure provisions set forth in Section 5.8,
         all of the representations and warranties made by RCSB and Target Bank
         in this Agreement and in any documents or certificates provided by RCSB
         and Target Bank shall have been true and correct in all material
         respects as of the date of this Agreement and as of the Effective Time
         (after giving effect to the Disclosure Supplements delivered by RCSB
         pursuant to Section 5.10 relating to intervening events) as though made
         on and as of the Effective Time;

                  (b) subject to the cure provisions set forth in Section 5.8,
         RCSB and Target Bank shall have performed in all material respects all
         obligations and shall have complied in all material respects with all
         agreements and covenants required by this Agreement to be performed or
         complied with by them prior to or at the Effective Time;

                  (c) there shall not have been any action taken or any statute,
         rule, regulation or order enacted, promulgated or issued or deemed
         applicable to the Merger by any federal or state government or
         governmental agency or instrumentality or court, which would prohibit
         ownership or operation of all or a portion of the business or assets of
         RCSB or any RCSB Subsidiary by COFI, Charter Michigan or Charter One
         Bank, or would compel COFI, Charter Michigan or Charter One Bank to
         dispose of all or a portion of the business or assets of RCSB or any
         RCSB Subsidiary, as a result of this Agreement, or which would render
         any party hereto unable to consummate the transactions contemplated by
         this Agreement;

                  (d) since the date hereof, RCSB shall not have suffered
         Material Adverse Effect;

                  (e) no regulatory authority shall impose any non-standard or
         unduly burdensome condition relating to the Merger, as determined in
         the reasonable judgment of COFI;

                  (f) COFI shall have received the opinion of Harris Beach &
         Wilcox, L.L.P., counsel to RCSB, in the form of the attached Exhibit F;

                  (g) COFI shall have received a certificate signed by the
         President and Chief Executive Officer of RCSB and Target Bank, dated as
         of the Effective Time, certifying that based upon his best knowledge,
         the conditions set forth in Sections 6.1(a), (b), (d), (l) and (m)
         hereof have been satisfied.

                  (h) simultaneous with the execution and delivery of this
         Agreement, (i) the directors of RCSB who are stockholders of RCSB shall
         have executed and delivered to COFI Voting Agreements in the form
         attached hereto as Exhibit A and (ii) immediately after the execution
         and delivery of this Agreement, the Stock Option Agreement shall have
         been executed and delivered by COFI and RCSB in the form attached
         hereto as Exhibit B;

                  (i) COFI shall have received from Deloitte & Touche L.L.P. a
         letter, in the form then customarily issued by such accountants in
         transactions of this type, to the effect that the Merger will qualify
         for pooling of interests accounting treatment;

                  (j) COFI shall have received the letters referred to in
         Section 5.3 from all executive officers and directors of RCSB and all
         stockholders who are affiliates of RCSB;


                                      A-40
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                  (k) Within five days prior to mailing the Joint Proxy
         Statement to the stockholders of COFI, COFI shall have received from
         Montgomery Securities (or another investment banking firm reasonably
         acceptable to COFI) a written opinion to the effect that the Company
         Merger is fair to the COFI stockholders from a financial point of view;

                  (l) Since November 30, 1996 to the Closing Date, the average
         monthly originations of auto loans and leases of RCSB and the RCSB
         Subsidiaries shall not exceed $92,000,000 (or a pro rata portion
         thereof in the case of the calendar month that Closing occurs); and

                  (m) monthly net charge-offs for the auto indirect portfolio of
         RCSB and the RCSB Subsidiaries based upon current charge-off accounting
         methodology utilized by American Credit Services, Inc., on the date of
         this Agreement shall not exceed .125% of the monthly average
         outstanding portfolio balance for any two calendar months commencing
         May, 1997.

         6.2 CONDITIONS TO THE OBLIGATIONS OF RCSB AND TARGET BANK.
Notwithstanding any other provision of this Agreement, the obligations of RCSB
and Target Bank to consummate the Merger are subject to the following conditions
precedent (except as to those which RCSB may chose to waive):

                  (a) subject to the cure provisions set forth in Section 5.8,
         all of the representations and warranties made by COFI in this
         Agreement and in any documents or certificates provided by COFI shall
         have been true and correct in all material respects as of the date of
         this Agreement and as of the Effective Time (after giving effect to the
         Disclosure Supplements delivered by COFI pursuant to Section 5.10
         relating to intervening events) as though made on and as of the
         Effective Time;

                  (b) subject to the cure provisions set forth in Section 5.8,
         COFI shall have performed in all material respects all obligations and
         shall have complied in all material respects with all agreements and
         covenants required by this Agreement to be performed or complied with
         by it prior to or at the Effective Time;

                  (c) since the date hereof, COFI shall not have suffered a
         Material Adverse Effect;

                  (d) RCSB shall have received the opinion of Silver, Freedman &
         Taff, L.L.P., counsel to COFI, in the form attached hereto as Exhibit
         G;

                  (e) RCSB shall have received a certificate signed by the
         President and Chief Executive Officer of COFI, dated as of the
         Effective Time, that based upon his best knowledge, the conditions set
         forth in Sections 6.2(a), (b) and (c) have been satisfied.

                  (f) Within five days prior to mailing the Joint Proxy
         Statement to the stockholders of RCSB, RCSB shall have received from
         Lehman Brothers (or another investment banking firm reasonably
         acceptable to RCSB) a written opinion to the effect that the Merger
         Consideration is fair to the RCSB stockholders from a financial point
         of view.

         6.3 CONDITIONS TO THE OBLIGATIONS OF THE PARTIES. Notwithstanding any
other provision of this Agreement, the obligations of COFI, Charter Michigan and
Charter One Bank on the one hand, and RCSB and Target Bank on the other hand, to
consummate the Merger are subject to the following conditions precedent (except
as to those which COFI or RCSB may chose to waive):

                  (a) No preliminary or permanent injunction or other order by
         any federal or state court which prevents the consummation of the
         Merger shall have been issued and shall remain in effect; nor shall
         there be any third party proceeding pending to prevent the consummation
         of the Merger;


                                      A-41
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                  (b) The parties shall have received all applicable regulatory
         approvals and consents to consummate the transactions contemplated in
         this Agreement and all required waiting periods shall have expired;

                  (c) The respective holders of a majority of the outstanding
         COFI Common Stock and RCSB Common Stock shall have approved this
         Agreement and the Company Merger;

                  (d) The Registration Statement shall have been declared
         effective under the Securities Act and no stop orders shall be in
         effect and no proceedings for such purpose shall be pending or
         threatened by the SEC;

                  (e) Each party shall have received the tax opinion addressed
         to it referred to in Section 5.12 of this Agreement; and

                  (f) The COFI Common Stock to be issued to holders of RCSB
         Common Stock shall have been approved for listing on the Nasdaq
         National Market subject to official notice of issuance.

                                   ARTICLE VII

                         TERMINATION; AMENDMENT; WAIVER

         7.1 TERMINATION.  This Agreement may be terminated at any time prior to
 the Effective Time:

                  (a) By the mutual written consent of the Boards of Directors
         of COFI and RCSB;

                  (b) At any time prior to the Effective Time, by COFI or RCSB
         if there shall have been a final judicial or regulatory determination
         (as to which all periods for appeal shall have expired and no appeal
         shall be pending) that any material provision of this Agreement is
         illegal, invalid or unenforceable (unless the enforcement thereof is
         waived by the affected party) or denying any regulatory application the
         approval of which is a condition precedent to a party's obligations
         hereunder;

                  (c) At any time on or before the date specified in 7.1(e)
         hereof, by COFI or RCSB in the event that any of the conditions
         precedent to the obligations of the other party to the Merger are
         rendered impossible to be satisfied or fulfilled by said date (other
         than by reason of a breach by the party seeking to terminate);

                  (d) By COFI or RCSB, in the event of a material breach by the
         other party of any representation, warranty, covenant or agreement
         contained herein or in any schedule or document delivered pursuant
         hereto, which breach would result in the failure to satisfy the closing
         condition set forth in Section 6.1(a) or 6.1(b) in the case of COFI, or
         Section 6.2(a) or 6.2(b) in the case of RCSB, and which breach cannot
         be or is not cured within thirty (30) days after written notice of such
         breach is given by the non-breaching party to the party committing such
         breach; or

                  (e) By COFI or RCSB on or after December 31, 1997, in the
         event the Company Merger has not been consummated by such date
         (provided that the terminating party is not then in material breach of
         any representation, warranty, covenant or other agreement contained
         herein).

                  In the event a party elects to effect any termination pursuant
         to Section 7.1(b) through 7.1(e) above, it shall give written notice to
         the other party hereto specifying the basis for such termination and
         certifying that such termination has been approved by the vote of a
         majority of the members of its Board of Directors.


                                      A-42
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         7.2 LIABILITIES AND REMEDIES. In the event that this Agreement is
terminated by a party (the "Aggrieved Party") solely by reason of the willful
and material breach by the other party ("Breaching Party") of any of its
representations or warranties or the material breach by the Breaching Party of
any of its covenants or agreements contained herein then the Aggrieved Party
shall be entitled to such remedies and relief against the Breaching Party as are
available at law or in equity. Moreover, the Aggrieved Party without terminating
this Agreement shall be entitled to specifically enforce the terms hereof
against the Breaching Party in order to cause the Merger to be consummated. Each
party acknowledges that there is not an adequate remedy at law to compensate the
other parties relating to the non- consummation of the Merger. To this end, each
party, to the extent permitted by law, irrevocably waives any defense it might
have based on the adequacy of a remedy at law which might be asserted as a bar
to specific performance, injunctive relief or other equitable relief.

         7.3 SURVIVAL OF AGREEMENTS. In the event of termination of this
Agreement by either COFI or RCSB as provided in Section 7.1, this Agreement
shall forthwith become void and have no effect except that the agreements
contained in Sections 5.1(b), 5.4, and 7.2 hereof shall survive the termination
hereof.

         7.4 AMENDMENT. This Agreement may be amended by the parties hereto by
action taken by their respective Boards of Directors at any time before or after
approval hereof by the stockholders of COFI and RCSB but, after such approval,
no amendment shall be made which changes the form of consideration or the value
of the consideration to be received by the stockholders of RCSB without the
approval of the stockholders of COFI and RCSB. This Agreement may not be amended
except by an instrument in writing signed on behalf of each of the parties
hereto. The parties may, without approval of their respective Boards of
Directors, make such technical changes to this Agreement, not inconsistent with
the purposes hereof as may be required to effect or facilitate any regulatory
approval or acceptance of the Merger or of this Agreement or to effect or
facilitate any regulatory or governmental filing or recording required for the
consummation of any of the transactions contemplated hereby.

         7.5 WAIVER. Any term, provision or condition of this Agreement (other
than the requirement of COFI and RCSB stockholder approval) may be waived in
writing at any time by the party which is entitled to the benefits hereof. Each
and every right granted to any party hereunder, or under any other document
delivered in connection herewith or therewith, and each and every right allowed
it by law or equity, shall be cumulative and may be exercised from time to time.
The failure of a party at any time or times to require performance of any
provision hereof shall in no manner affect such party's right at a later time to
enforce the same. No waiver by any party of a condition or of the breach of any
term, covenant, representation or warranty contained in this Agreement, whether
by conduct or otherwise, in any one or more instances shall be deemed to be or
construed as a further or continuing waiver of any such condition or breach or a
waiver of any other condition or of the breach of any other term, covenant,
representation or warranty of this Agreement. No investigation, review or audit
by a party of another party prior to or after the date hereof shall estop or
prevent such party form exercising any right hereunder or be deemed to be a
waiver of any such right.

                                  ARTICLE VIII

                               GENERAL PROVISIONS

         8.1 SURVIVAL. All representations, warranties, covenants and agreements
of the parties in this Agreement or in any instrument delivered by the parties
pursuant to this Agreement (other than the agreements, covenants and obligations
set forth herein which are contemplated to be performed after the Effective
Time) shall not survive the Effective Time, provided that no such
representations, warranties or covenants shall be deemed to be terminated or
extinguished so as to deprive any party (or any of its directors, officers,
employees or agents) of any defense in law or equity which otherwise would be
available against the claims of any person, including, without limitation, any
stockholder or former stockholder of either COFI or RCSB, the aforesaid
representations, warranties, and covenants being material inducements to
consummation by the parties and the surviving corporation and resulting
institution of the transactions contemplated hereby.


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         8.2 NOTICES. All notices and other communications hereunder shall be in
writing and shall be deemed given if delivered personally, by facsimile
transmission or by registered or certified mail to the parties at the following
addresses (or at such other address for a party as shall be specified by like
notice) and shall be deemed to be delivered on the date so delivered:

                  (a)      if to COFI, Charter Michigan or Charter One Bank:

                                    Mr. Charles J. Koch
                                    Chief Executive Officer
                                    Charter One Financial, Inc.
                                    1215 Superior Avenue
                                    Cleveland, OH  44114

                           copy to:

                                    Mr. Robert J. Vana
                                    Chief Corporate Counsel
                                    Charter One Financial, Inc.
                                    1215 Superior Avenue
                                    Cleveland, OH  44114

                                            and

                                    Barry P. Taff, Esq.
                                    Silver, Freedman & Taff L.L.P.
                                    1100 New York Ave., N.W.
                                    Washington, D.C.  20005

                  (b)      if to RCSB or Target Bank:

                                    Mr. Leonard S. Simon
                                    Chairman of the Board, President
                                        and Chief Executive Officer
                                    RCSB Financial, Inc.
                                    235 East Main Street
                                    Rochester, NY  14604

                           copy to:

                                    Thomas E. Willett, Esq.
                                    Harris Beach & Wilcox, LLP
                                    Granite Building
                                    l30 East Main Street
                                    Rochester, NY  14604

         8.3 APPLICABLE LAW. This Agreement shall be construed and interpreted
according to the laws of the State of Delaware without regard to conflicts of
laws principles thereof, except to the extent that the federal laws of the
United States apply.

         8.4 HEADINGS, ETC. The article headings and section headings contained
in this Agreement are inserted for convenience only and shall not affect in any
way the meaning or interpretation of this Agreement.


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         8.5 SEVERABILITY. If any term, provision, covenant, or restriction
contained in this Agreement is held by a final and unappealable order of a court
of competent jurisdiction to be invalid, void, or unenforceable, then the
remainder of the terms, provisions, covenants, and restrictions contained in
this Agreement shall remain in full force and effect, and shall in no way be
affected, impaired, or invalidated unless the effect would be to cause this
Agreement to not achieve its essential purposes.

         8.6 ENTIRE AGREEMENT; BINDING EFFECT; NON-ASSIGNMENT; COUNTERPARTS.
Except as otherwise expressly provided herein, this Agreement (including the
documents and instruments referred to herein) (a) constitutes the entire
agreement between the parties hereto and supersedes all other prior agreements
and undertakings, both written and oral, between the parties, with respect to
the subject matter hereof; and (b) is not intended to confer upon any other
person any rights or remedies hereunder except as specifically provided herein.
This Agreement shall be binding upon and inure to the benefit of the parties
named herein and their respective successors. Neither this Agreement nor any of
the rights, interests or obligations hereunder shall be assigned by any party
hereto without the prior written consent of the other party hereto. This
Agreement may be executed in two or more counterparts which together shall
constitute a single agreement.

         The undersigned have caused this Agreement to be executed as of the day
and year first above written.

                                   CHARTER ONE FINANCIAL, INC.

                                   By /s/ Charles J. Koch
                                      ----------------------------- 
                                      Authorized Officer

                                   CHARTER MICHIGAN BANCORP, INC.
                                   
                                   By /s/ Charles J. Koch
                                      ----------------------------- 
                                      Authorized Officer

                                   CHARTER ONE BANK F.S.B.
                                   
                                   By /s/ Charles J. Koch
                                      ----------------------------- 
                                      Authorized Officer

                                   RCSB FINANCIAL, INC.
                                   
                                   By /s/ Leonard S. Simon
                                      ----------------------------- 
                                      Authorized Officer

                                   ROCHESTER COMMUNITY SAVINGS BANK

                                   By /s/ Leonard S. Simon
                                      ----------------------------- 
                                      Authorized Officer


                                      A-45
<PAGE>   136
                           [MONTGOMERY LETTERHEAD]

                                                                         ANNEX B

                                                                    May 21, 1997

Board of Directors
Charter One Financial, Inc.
1215 Superior Avenue
Cleveland, Ohio 44114

Ladies and Gentlemen:

         We understand that Charter One Financial, Inc., a Delaware Corporation
("Charter One"), Charter Michigan Bancorp, Inc., a Michigan Corporation and a
wholly-owned, first-tier subsidiary of Charter One ("Charter Michigan"), Charter
One Bank F.S.B., a federally chartered savings bank and a wholly-owned
subsidiary of Charter Michigan ("Charter One Bank"), RCSB Financial, Inc., a
Delaware Corporation ("RCSB"), and Rochester Community Savings Bank, a New York
chartered savings bank and a wholly-owned, first-tier subsidiary of RCSB
("Target Bank"), propose to enter into an Agreement and Plan of Merger and
Reorganization dated May 21, 1997 (the "Merger Agreement"), pursuant to which
RCSB will be merged ("Company Merger") with and into Charter Michigan, followed
immediately by the merger of Target Bank with and into Charter One Bank ("Bank
Merger"). The Company Merger and the Bank Merger are collectively referred to
herein as the "Merger." Further, pursuant to the Merger, as more fully described
in the Merger Agreement and as further described to us by management of Charter
One, we understand that each outstanding share of the common stock, $1.00 par
value per share, of RCSB Common Stock will be converted into and exchangeable
for .91 shares of the common stock, $.01 par value per share ("Charter One
Common Stock"), of Charter One, including associated rights, subject to certain
adjustments (the "Consideration"). The terms and conditions of the Merger are
set forth in more detail in the Merger Agreement.

         You have asked for our opinion as investment bankers as to whether the
Consideration to be paid by Charter One pursuant to the Merger is fair to
Charter One from a financial point of view, as of the date hereof. As you are
aware, we were not retained to nor did we advise Charter One with respect to
alternatives to the Merger or Charter One's underlying decision to proceed with
or effect the Merger.

         In connection with our opinion, we have, among other things: (i)
reviewed certain publicly available financial and other data with respect to
RCSB and Charter One, including the consolidated financial statements for recent
years and interim periods to February 28, 1997 and March 31, 1997 for RCSB and
Charter One, respectively, and certain other relevant financial and operating
data relating to RCSB and Charter One made available to us from published
sources and from the internal records of RCSB and Charter One; (ii) reviewed the
financial terms and conditions of the Merger Agreement; (iii) reviewed certain
publicly available information concerning the trading of, and the trading market
for, RCSB Common Stock and Charter One Common Stock; (iv) compared RCSB and
Charter One from a financial point of view with certain other companies in the
thrift industry which we deemed to be relevant; (v) considered the financial
terms, to the extent publicly available, of selected recent business
combinations of companies in the thrift industry which we deemed to be
comparable, in whole or in part, to the Merger; (vi) reviewed and discussed with
representatives of the management of RCSB and Charter One certain information of
a business and financial nature regarding RCSB and Charter One, furnished to us
by them, including financial projections and related assumptions of RCSB and
Charter One; (vii) made inquiries regarding and discussed the Merger and the
Merger Agreement and other matters related thereto with Charter One's counsel;
and (viii) performed such other analyses and examinations as we have deemed
appropriate.

         In connection with our review, we have not assumed any obligation
independently to verify the foregoing information and have relied on it being
accurate and complete in all material respects. With respect to the financial
projections for RCSB and Charter One provided to us by their respective
managements, upon their advice and with your consent we have assumed for
purposes of our opinion that the projections have been reasonably prepared on a
bases reflecting the best available estimates and judgments of their respective
managements at the time of preparation as to the future financial performance of
RCSB and Charter One and that they provide a reasonable basis upon which
we can form our opinion. We have also assumed that there have been no material
changes in RCSB's or Charter One's assets, 


                            MONTGOMERY SECURITIES


               INVESTMENT BANKING, BROKERAGE, ASSET MANAGEMENT


            600 MONTGOMERY STREET, SAN FRANCISCO, CALIFORNIA 94111


                           TELEPHONE (415) 627-2000
<PAGE>   137

                                Montgomery


Charter One Financial, Inc.
May 21, 1997
Page 2


financial condition, results of operations, business or prospects since the
respective dates of their last financial statements made available to us. We
have relied on advice of counsel and independent accountants to RCSB and Charter
One as to all legal and financial reporting matters with respect to RCSB and
Charter One the Merger and the Merger Agreement. We have assumed that the Merger
will be consummated in a manner that complies in all respects with the
applicable provisions of the Securities Act of 1933, as amended (the "Securities
Act"), the Securities Exchange Act of 1934 and all other applicable federal and
state statutes, rules and regulations. We are not experts in the evaluation of
loan portfolios for purposes of assessing the adequacy of the allowance for
losses with respect thereto and have assumed, with your consent, that such
allowances for each of RCSB and Charter One are in the aggregate adequate to
cover such losses. In addition, we have not assumed responsibility for reviewing
any individual credit files, or making an independent evaluation, appraisal or
physical inspection of any of the assets or liabilities (contingent or
otherwise) of RCSB and Charter One, nor have we been furnished with any such
appraisals. You have informed us, and we have assumed, that the Merger will be
recorded as a pooling of interests under generally accepted accounting
principles. Finally, our opinion is based on economic, monetary and market and
other conditions as in effect on, and the information made available to us as
of, the date hereof. Accordingly, although subsequent developments may affect
this opinion, we have not assumed any obligation to update, revise or reaffirm
this opinion.

         We have further assumed with your consent that the Merger will be
consummated in accordance with the terms described in the Merger Agreement,
without any further amendments thereto, and without waiver by RCSB of any of the
conditions to its obligations thereunder.

         We have acted as financial advisor to Charter One in connection with
the Merger and will receive a fee for our services, including rendering this
opinion, a significant portion of which is contingent upon the consummation of
the Merger. In the ordinary course of our business, we actively trade the equity
securities of Charter One for our own account and for the accounts of customers
and, accordingly, may at any time hold a long or short position in such
securities. We have also performed various investment banking services for
Charter One.

         Based upon the foregoing and in reliance thereon, it is our opinion as
investment bankers that the Consideration to be paid by Charter One pursuant to
the Merger is fair to Charter One from a financial point of view, as of the date
hereof.

         This opinion is directed to the Board of Directors of Charter One in
its consideration of the Merger and is not a recommendation to any shareholder
as to how such shareholder should vote with respect to the Merger. Further, this
opinion addresses only the financial fairness of the Consideration to Charter
One and does not address any other aspect of the Merger. This opinion may not be
used or referred to by Charter One, or quoted or disclosed to any person in any
manner, without our prior written consent, which consent is hereby given to the
inclusion of this opinion in any proxy statement or prospectus filed with the
Securities and Exchange Commission in connection with the Merger. In furnishing
this opinion, we do not admit that we are experts within the meaning of the term
"experts" as used in the Securities Act and the rules and regulations
promulgated thereunder, nor do we admit that this opinion constitutes a report
or valuation within the meaning of Section 11 of the Securities Act.

                                Very truly yours,

                            /s/Montgomery Securities

                              MONTGOMERY SECURITIES


                                       B-2


<PAGE>   138
                                                                         ANNEX C

                                 LEHMAN BROTHERS

May 21, 1997

Board of Directors
RCSB Financial, Inc.
235 East Main Street
Rochester, New York 14604

Members of the Board:

        We understand that RCSB Financial, Inc. ("RCSB" or the
"Company") and Charter One Financial, Inc. ("Charter One") propose to enter
into an Agreement and Plan of Merger and Reorganization (the "Merger
Agreement"), which provides, among other things, for the merger of RCSB with
and into a wholly owned subsidiary of Charter One. Pursuant to the Merger
Agreement each issued and outstanding share of RCSB common stock, par value
$1.00 per share, shall be converted into the right to receive 0.910 of a share
of common stock of Charter One (the "Exchange Ratio") (the "Proposed
Transaction"). The terms and conditions of the Proposed Transaction are set
forth in more detail in the Merger Agreement.

        We have been requested by the Board of Directors of the Company
to render our opinion with respect to the fairness, from a financial point of
view, to the Company's stockholders of the Exchange Ratio to be offered to such
stockholders in the Proposed Transaction. We have not been asked to opine as
to, and our opinion does not in any manner address, the Company's underlying
business decision to proceed with or effect the Proposed Transaction.

        In arriving at our opinion, we reviewed and analyzed: (1) the
Merger Agreement and the specific terms of the Proposed Transaction, (2)
publicly available information concerning the Company and Charter One that we
believe to be relevant to our analysis, (3) financial and operating information
with respect to the business, operations and prospects of the Company furnished
to us by the Company, (4) financial and operating information with respect to
the business, operations and prospects of Charter One furnished to us by
Charter One, (5) a comparison of the historical financial results and present
financial condition of the Company with those of other companies that we deemed
relevant, (6) a comparison of the historical financial results and present
financial condition of Charter One with those of other companies that we deemed
relevant, (7) a trading history of the Company's common stock from May 1992 to
the present and a comparison of that trading history with those of other
companies that we deemed relevant, (8) a trading history of Charter One's
common stock from May 1992 to the present and a comparison of that trading
history with those of other companies that we deemed relevant, (9) the
potential pro forma impact on Charter One of the Proposed Transaction, and (10)
a comparison of the financial terms of the Proposed Transaction with the
financial terms of certain other transactions that we deemed relevant. In
addition, we have had discussions with the management of Charter One and the
Company concerning their respective businesses, operations, assets, financial
conditions and prospects and their estimates of the cost savings, operating
synergies and other strategic benefits expected to result from a combination of
the businesses of the Company and Charter One, and have undertaken such other
studies, analyses and investigations as we deemed appropriate.

        In arriving at our opinion, we have assumed and relied upon the accuracy
and completeness of the financial and other information used by us without
assuming any responsibility for independent verification of such information and
have further relied upon the assurances of management of the Company and Charter
One that they are not aware of any 


<PAGE>   139

facts that would make such information inaccurate or misleading. With respect to
the financial projections of the Company, Charter One and the combined company
following the consummation of the Proposed Transaction, upon advice of the
Company we have assumed that such projections have been reasonably prepared on a
basis reflecting the best currently available estimates and judgments of the
managements of the Company or Charter One, as the case may be, as to the future
financial performance of the Company, Charter One and the combined company and
that the Company and Charter One would perform, and the combined company will
perform, substantially in accordance with such projections. In arriving at our
opinion, we have not conducted a physical inspection of the properties and
facilities of the Company or Charter One and have not made or obtained any
evaluations or appraisals of the assets or liabilities of the Company or Charter
One. In addition, we are not experts in the evaluation of loan portfolios or
allowances for loan and real estate owned losses and, upon advice of the
Company, we have assumed that the allowances for loan and real estate owned
losses provided to us by the Company and used by us in our analysis and in
arriving at our opinion are in the aggregate adequate to cover all such losses.
In addition, you have not authorized us to solicit, and we have not solicited,
any indications of interest from any third party with respect to the purchase of
all or a part of the Company's business. Upon advice of the Company and its
legal and accounting advisors, we have assumed that the Proposed Transaction
will qualify (i) for pooling-of-interests accounting treatment and (ii) as a
reorganization within the meaning of Section 368(a) of the Internal Revenue Code
of 1986, as amended, and therefore as a tax-free transaction to the stockholders
of the Company. Our opinion necessarily is based upon market, economic and other
conditions as they exist on, and can be evaluated as of, the date of this
letter.

        Based upon and subject to the foregoing, we are of the opinion as of
the date hereof that, from a financial point of view, the Exchange Ratio to be
offered to the Company's stockholders in the Proposed Transaction is fair to
such stockholders.

        We have acted as financial advisor to the Company in connection with
the Proposed Transaction and will receive a fee for our services which is
contingent upon the consummation of the Proposed Transaction. In addition, the
Company has agreed to indemnify us for certain liabilities that may arise out
of the rendering of this opinion. We have performed various investment banking
services for the Company in the past and have received customary fees for such
services. In addition, we have been engaged by, and performed investment
banking services for, Charter One in the past and have received customary fees
for such services. In the ordinary course of our business, we actively trade in
the securities of the Company and Charter One for our own account and for the
accounts of our customers and, accordingly, may at any time hold a long or
short position in such securities.

        This opinion is for the use and benefit of the Board of Directors of the
Company and is rendered to the Board of Directors in connection with its
consideration of the Proposed Transaction. This opinion is not intended to be
and does not constitute a recommendation to any stockholder of the Company as to
how such stockholder should vote with respect to the Proposed Transaction.

                                Very truly yours,

                                LEHMAN BROTHERS INC.

                                       C-2


<PAGE>   140
                                                                         ANNEX D

                                OPTION AGREEMENT
                                ----------------

         OPTION AGREEMENT ("Option Agreement") dated May 21, 1997, among Charter
One Financial, Inc. ("COFI"), a Delaware corporation registered as a savings and
loan holding company under the Home Owners' Loan Act, as amended ("HOLA"), and
RCSB Financial, Inc. ("RCSB"), a Delaware corporation registered as a savings
and loan holding company under HOLA.

                              W I T N E S S E T H:
                              - - - - - - - - - -

         WHEREAS, the Boards of Directors of COFI and RCSB have approved an
Agreement and Plan of Merger and Reorganization dated as of even date herewith
(the "Merger Agreement") providing for, among other things, the merger of RCSB
with and into a subsidiary of COFI;

         WHEREAS, as a condition to COFI entering into the Merger Agreement,
COFI has required that RCSB agree, and RCSB has agreed, to grant to COFI the
option set forth herein to purchase authorized but unissued shares of COFI
Common Stock.

         NOW, THEREFORE, in consideration of the premises herein contained, the
parties agree as follows:

         1. Definitions.
            -----------

         Capitalized terms used but not defined herein shall have the same
meanings as in the Merger Agreement.

         2. Grant of Option.
            ---------------

         Subject to the terms and conditions set forth herein, RCSB hereby
grants to COFI an option (the "Option") to purchase from RCSB up to 2,880,944
authorized and unissued shares of RCSB Common Stock at a price of $37.50 per
share (the "Purchase Price") payable in cash as provided in Section 4 hereof.

         3. Exercise of Option.
            ------------------

         (a) COFI may exercise the Option, in whole or in part, at any time or
from time to time if a Purchase Event (as defined below) shall have occurred;
PROVIDED, HOWEVER, that (i) to the extent the Option shall not have been
exercised, it shall terminate and be of no further force and effect upon the
earliest to occur of (A) the Effective Time of the Company Merger, (B) the
termination of the Merger Agreement in accordance with Section 7.1 other than a
termination by COFI pursuant to Section 7.1(d) thereof, and (C) eighteen months
following the termination of the Merger Agreement by COFI in accordance with
Section 7.1(d) thereof, PROVIDED that if such termination pursuant to subpart
(B) above follows an Extension Event (as defined below), the Option shall not
terminate until the date that is 12 months following such termination; (ii) if
the Option cannot be exercised on such day because of any injunction, order or
similar restraint issued by a court of competent jurisdiction, the Option shall
expire on the 30th business day after such injunction, order or restraint shall
have been dissolved or when such injunction, order or restraint shall have
become permanent and no longer subject to appeal, as the case may be; and (iii)
that any such exercise shall be subject to compliance with applicable law,
including the HOLA.

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

                  (i) RCSB or any of the RCSB Subsidiaries, without having
         received prior written consent from COFI, shall have entered into,
         authorized, recommended, proposed or publicly announced its intention
         to enter into, authorize, recommend, or propose, an agreement,
         arrangement or understanding with any person (other than COFI or an
         COFI Subsidiary to (A) effect a merger or consolidation or similar
         transaction involving RCSB or any RCSB Subsidiary (other than internal
         mergers, reorganizing actions, consolidations or dissolutions involving
         only existing RCSB Subsidiaries), (B) purchase, lease or otherwise
         acquire 35% or



<PAGE>   141



         more of the consolidated assets of RCSB, or (C) purchase or otherwise
         acquire (including by way of merger, consolidation, share exchange or
         similar transaction) Beneficial Ownership (as defined below) of common
         stock representing 20% or more of the voting power of RCSB or any RCSB
         Subsidiary;

                  (ii) any person or group (other than COFI or an COFI
         Subsidiary, or RCSB or any RCSB Subsidiary acting in a fiduciary
         capacity) shall have acquired Beneficial Ownership or the right to
         acquire Beneficial Ownership of 20% or more of the voting power of
         RCSB; or

                  (iii) RCSB's Board of Directors shall have withdrawn or
         modified in a manner adverse to COFI the recommendation of the Board of
         Directors with respect to the Merger Agreement and the Company Merger,
         in each case after an Extension Event; or

                  (iv) the holders of RCSB Common Stock shall not have approved
         the Merger Agreement and the Company Merger at the RCSB stockholders'
         meeting held for such purpose, or such meeting shall not have been held
         or shall have been canceled prior to termination of the Merger
         Agreement in accordance with its terms, in each case after an Extension
         Event.

         (c) As used herein, the term "Extension Event" shall mean any of the
following events:

                  (i) a Purchase Event of the type specified in clauses (b) (i) 
         and (b) (ii) above;

                  (ii) any person or group (other than COFI or an COFI
         Subsidiary,) 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 shares of RCSB Common Stock such that, upon
         consummation of such offer, such person or group would have Beneficial
         Ownership or the right to acquire Beneficial Ownership of 20% or more
         of the voting power of RCSB;

                  (iii) any person or group (other than COFI or an COFI
         Subsidiary) shall have publicly announced its willingness, or shall
         have publicly announced a proposal, or publicly disclosed an intention
         to make a proposal, (x) to make an offer described in clause (ii) above
         or (y) to engage in a transaction described in clause (i) above; or

                  (iv) any person, by public proxy, consent solicitation or
         other process made to the RCSB stockholders, shall seek proxies in
         opposition to the Merger Agreement and Company Merger.

         (d) As used herein, the terms "Beneficial Ownership" and "Beneficially
Own" shall have the meanings ascribed to them in Rule 13d-3 under the Exchange
Act.

         (e) In the event COFI wishes to exercise the Option, it shall deliver
to RCSB a written notice (the date of which being herein referred to as the
"Notice Date") specifying (i) the total number of shares of RCSB Common Stock it
intends to purchase pursuant to such exercise and (ii) a place and date not
earlier than three business days nor later than 60 calendar days from the Notice
Date for the closing of such purchase (the "Closing Date").

         4. Payment and Delivery of Certificates.
         ---------------------------------------

         (a) At the closing referred to in Section 3 hereof, COFI shall pay to
RCSB the aggregate Purchase Price for the shares of RCSB Common Stock purchased
pursuant to the exercise of the Option in immediately available funds by wire
transfer to a bank account designated by RCSB.

         (b) At such closing, simultaneously with the delivery of cash as
provided in Section 4(a), RCSB shall deliver to COFI a certificate or
certificates representing the number of shares of RCSB Common Stock purchased by
COFI, registered in the name of COFI or a nominee designated in writing by COFI,
and COFI shall deliver to RCSB a letter agreeing that COFI shall not offer to
sell, pledge or otherwise dispose of such shares in violation of applicable law
or the provisions of this Option Agreement.

                                       D-2


<PAGE>   142



         (c) If at the time of issuance of any RCSB Common Stock pursuant to any
exercise of the Option, RCSB shall have issued any share purchase rights or
similar securities to holders of RCSB Common Stock, then each such share of RCSB
Common Stock shall also represent rights with terms substantially the same as
and at least as favorable to COFI as those issued to other holders of RCSB
Common Stock.

         (d) Certificates for RCSB Common Stock delivered at any closing
hereunder shall be endorsed with a restrictive legend which shall read
substantially as follows:

         The transfer of the shares represented by this certificate is subject
         to certain provisions of an agreement between the registered holder
         hereof and RCSB Financial, Inc. dated May 21, 1997, a copy of which is
         on file at the principal office of RCSB Financial, Inc., and to resale
         restrictions arising under the Securities Act of 1933 and any
         applicable state securities laws. A copy of such agreement will be
         provided to the holder hereof without charge upon receipt by RCSB
         Financial, Inc. of a written request therefor.

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

         5. Authorization, Etc.
            ------------------

         (a) RCSB hereby represents and warrants to COFI that:

                  (i) RCSB has full corporate authority to execute and deliver
         this Option Agreement and, subject to Section 11(i), to consummate the
         transactions contemplated hereby;

                  (ii) such execution, delivery and consummation have been
         authorized by its Board of Directors, and no other corporate actions
         are necessary therefor;

                  (iii) this Option Agreement has been duly and validly executed
         and delivered and represents a valid and legally binding obligation of
         RCSB, enforceable against RCSB in accordance with its terms; and

                  (iv) RCSB has taken all necessary corporate action to
         authorize and reserve and, subject to Section 11(i), permit it to issue
         and, at all times from the date hereof through the date of the exercise
         in full or the expiration or termination of the Option, shall have
         reserved for issuance upon exercise of the Option, 2,880,944 shares of
         RCSB Common Stock, all of which, upon issuance pursuant hereto, shall
         be duly authorized, validly issued, fully paid and nonassessable, and
         shall be delivered free and clear of all claims, liens, encumbrances,
         restrictions (other than federal and state securities restrictions) and
         security interests and not subject to any preemptive rights.

         (b) COFI hereby represents and warrants to RCSB that:

                  (i) COFI has full corporate authority to execute and deliver
         this Option Agreement and, subject to Section 11(i), to consummate the
         transactions contemplated hereby;

                  (ii) such execution, delivery and consummation have been
         authorized by all requisite corporate action by COFI, and no other
         corporate proceedings are necessary therefor;

                  (iii) this Option Agreement has been duly and validly executed
         and delivered and represents a valid and legally binding obligation of
         COFI, enforceable against COFI in accordance with its terms; and

                  (iv) any RCSB Common Stock or other securities acquired by
         COFI upon exercise of the Option will not be taken with a view to the
         public distribution thereof and will not be transferred or otherwise
         disposed of except in compliance with the Securities Act.

                                       D-3


<PAGE>   143



         6. Adjustment upon Changes in Capitalization.
            -----------------------------------------

         In the event of any change in RCSB Common Stock by reason of dividends,
split-ups, recapitalizations or the like, the type and number of shares subject
to the Option, and the purchase price per share, as the case may be, shall be
adjusted appropriately. In the event that any additional shares of RCSB Common
Stock are issued after the date of this Option Agreement (other than pursuant to
an event described in the preceding sentence or pursuant to this Option
Agreement), the number of shares of RCSB Common Stock subject to the Option
shall be adjusted so that, after such issuance, it equals at least 19.9% of the
number of shares of RCSB Common Stock then issued and outstanding (without
considering any shares subject to or issued pursuant to the Option).

         7. Repurchase.
            ----------

         (a) Subject to Section 11(i), at the request of COFI at any time
commencing upon the occurrence of a Purchase Event and ending 13 months
immediately thereafter (the "Repurchase Period"), RCSB (or any successor entity
thereof) shall repurchase the Option from COFI together with all (but not less
than all, subject to Section 10) shares of RCSB Common Stock purchased by COFI
pursuant thereto with respect to which COFI then has Beneficial Ownership, at a
price (per share, the "Per share Repurchase Price") equal to the sum of:

                  (i) The exercise price paid by COFI for any shares of RCSB
         Common Stock acquired pursuant to the Option;

                  (ii) The difference between (A) the "Market/Tender Offer
         Price" for shares of RCSB Common Stock (defined as the higher of (x)
         the highest price per share at which a tender or exchange offer has
         been made for shares of RCSB Common Stock or (y) the highest closing
         mean of the "bid" and the "ask" price per share of RCSB Common Stock
         reported by the Nasdaq, the automated quotation system of the National
         Association of Securities Dealers, Inc., for any day within that
         portion of the Repurchase Period which precedes the date COFI gives
         notice of the required repurchase under this Section 7) and (B) the
         exercise price as determined pursuant to Section 2 hereof (subject to
         adjustment as provided in Section 6), multiplied by the number of
         shares of RCSB Common Stock with respect to which the Option has not
         been exercised, but only if the Market/Tender Offer Price is greater
         than such exercise price; and

                  (iii) The difference between the Market/Tender Offer Price and
         the exercise price paid by COFI for any shares of RCSB Common Stock
         purchased pursuant to the exercise of the Option, multiplied by the
         number of shares so purchased, but only if the Market/Tender Offer
         Price is greater than such exercise price.

         (b) In the event COFI exercises its rights under this Section 7, RCSB
shall, within ten business days thereafter, pay the required amount to COFI by
wire transfer of immediately available funds to an account designated by COFI
and COFI shall surrender to RCSB the Option and the certificates evidencing the
shares of RCSB Common Stock purchased thereunder with respect to which COFI then
has Beneficial Ownership, and COFI shall warrant that it has sole record and
Beneficial Ownership of such certificates and that the same are free and clear
of all liens, claims, charges, restrictions and encumbrances of any kind
whatsoever.

         (c) In determining the Market/Tender Offer Price, the value of any
consideration other than cash shall be determined by an independent nationally
recognized investment banking firm selected by COFI and reasonably acceptable to
RCSB.

         8. Repurchase at Option of RCSB and First Refusal.
            ----------------------------------------------

         (a) Except to the extent that COFI shall have previously exercised its
rights under Section 7, at the request of RCSB during the six-month period
commencing 13 months following the first occurrence of a Purchase Event, RCSB
may repurchase from COFI, and COFI shall sell to RCSB, all (but not less than
all, subject to Section 10) of the RCSB Common Stock acquired by COFI pursuant
hereto and with respect to which COFI has Beneficial Ownership at the time of
such repurchase at a price per share equal to the greater of (i) 110% of the
Market/Tender Offer Price per share, (ii) the Per Share Repurchase Price or
(iii) the sum of (A) the aggregate Purchase Price of the shares so repurchased
plus 


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<PAGE>   144

(B) interest on the aggregate Purchase Price paid for the shares so repurchased
from the date of purchase to the date of repurchase at the highest rate of
interest announced by COFI Bank as its prime or base lending or reference rate
during such period, less any dividends received on the shares so repurchased,
plus (C) COFI's reasonable out-of-pocket expenses incurred in connection with
the transactions contemplated by the Merger Agreement, including, without
limitation, legal, accounting and investment banking fees. Any repurchase under
this Section 8(a) shall be consummated in accordance with Section 7(b).

         (b) If, at any time after the occurrence of a Purchase Event and prior
to the earlier of (i) the expiration of 18 months immediately following such
Purchase Event or (ii) the expiration or termination of the Option, COFI shall
desire to sell, assign, transfer or otherwise dispose of the Option or all or
any of the shares of RCSB Common Stock acquired by it pursuant to the Option, it
shall give RCSB written notice of the proposed transaction (an "Offeror's
Notice"), identifying the proposed transferee, and setting forth the terms of
the proposed transaction. An Offeror's Notice shall be deemed an offer by COFI
to RCSB, which may be accepted within five business days of the receipt of such
Offeror's Notice, on the same terms and conditions and at the same price at
which COFI is proposing to transfer the Option or such shares to a third party.
The purchase of the Option or any such shares by RCSB shall be closed within
five business days of the date of the acceptance of the offer and the purchase
price shall be paid to COFI by wire transfer of immediately available funds to
an account designated by COFI. In the event of the failure or refusal of RCSB to
purchase the Option or all the shares covered by the Offeror's Notice or if any
regulatory authority disapproves RCSB's proposed purchase of the Option or such
shares, COFI may, within 60 days from the date of the Offeror's Notice, sell
all, but not less than all, of the Option or such shares to such third party at
no less than the price specified and on terms no more favorable to the purchaser
than those set forth in the Offeror's Notice. The requirements of this Section
8(b) shall not apply to (i) any disposition as a result of which the proposed
transferee would Beneficially Own not more than 2% of the voting power of RCSB
or (ii) any disposition of RCSB Common Stock by a person to whom COFI has sold
RCSB Common Stock issued upon exercise of the Option.

         9. Registration Rights.
            -------------------

         At any time after a Purchase Event, RCSB shall, if requested by any
holder or beneficial owner of shares of RCSB Common Stock issued upon exercise
of the Option (except any beneficial holder who acquired all of such holder's
shares in a transaction exempt from the requirements of Section 8(b) by reason
of clause (i) thereof) (each a "Holder"), as expeditiously as possible file a
registration statement on a form for general use under the Securities Act if
necessary in order to permit the sale or other disposition of the shares of RCSB
Common Stock that have been acquired upon exercise of the Option in accordance
with the intended method of sale or other disposition requested by any such
Holder (it being understood and agreed that any such sale or other disposition
shall be effected on a widely distributed basis so that, upon consummation
thereof, no purchaser or transferee shall Beneficially Own more than 2% of the
shares of RCSB Common Stock then outstanding). Each such Holder shall provide
all information reasonably requested by RCSB for inclusion in any registration
statement to be filed hereunder. RCSB shall use its best efforts to cause such
registration statement first to become effective and then to remain effective
for such period not in excess of 180 days from the day such registration
statement first becomes effective as may be reasonably necessary to effect such
sales or other dispositions. The registration effected under this Section 9
shall be at RCSB's expense except for underwriting commissions and the fees and
disbursements of such Holders' counsel attributable to the registration of such
RCSB Common Stock. In no event shall RCSB be required to effect more than one
registration hereunder. The filing of the registration statement hereunder may
be delayed for such period of time as may reasonably be required to facilitate
any public distribution by RCSB of RCSB Common Stock or if a special audit of
RCSB would otherwise be required in connection therewith. If requested by any
such Holder in connection with such registration, RCSB shall become a party to
any underwriting agreement relating to the sale of such certificates, but only
to the extent of obligating itself in respect of representations, warranties,
indemnities and other agreements customarily included in such underwriting
agreements for parties similarly situated. Upon receiving any request for
registration under this Section 9 from any Holder, RCSB agrees to send a copy
thereof to any other person known to RCSB to be entitled to registration rights
under this Section 9, in each case by promptly mailing the same, postage
prepaid, to the address of record of the persons entitled to receive such
copies.

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<PAGE>   145



         10. Severability.
             ------------

         Any term, provision, covenant or restriction contained in this Option
Agreement held by a court or a regulatory authority of competent jurisdiction to
be invalid, void or unenforceable, shall be ineffective to the extent of such
invalidity, voidness or unenforceability, but neither the remaining terms,
provisions, covenants or restrictions contained in this Option Agreement nor the
validity or enforceability thereof in any other jurisdiction shall be affected
or impaired thereby. Any term, provision, covenant or restriction contained in
this Option Agreement that is so found to be so broad as to be unenforceable
shall be interpreted to be as broad as is enforceable. If for any reason such
court or regulatory authority determines that applicable law will not permit
COFI or any other person to acquire, or RCSB to repurchase or purchase, the full
number of shares of RCSB Common Stock provided in Section 2 hereof (as adjusted
pursuant to Section 6 hereof), it is the express intention of the parties hereto
to allow COFI or such other person to acquire, or RCSB to repurchase or
purchase, such lesser number of shares as may be permissible, without any
amendment or modification hereof.

         11. Miscellaneous.
             -------------

         (a) EXPENSES. Each of the parties hereto shall pay all costs and
expenses incurred by it or on its behalf in connection with the transactions
contemplated hereunder, including fees and expenses of its own financial
consultants, investment bankers, accountants and counsel, except as otherwise
provided herein.

         (b) ENTIRE AGREEMENT. Except as otherwise expressly provided herein,
this Option Agreement and the Merger Agreement contain the entire agreement
between the parties with respect to the transactions contemplated hereunder and
supersedes all prior arrangements or understandings with respect thereto,
written or oral.

         (c) SUCCESSORS; NO THIRD PARTY BENEFICIARIES. The terms and conditions
of this Option Agreement shall inure to the benefit of and be binding upon the
parties hereto and their respective successors and permitted assigns. Nothing in
this Option Agreement, expressed or implied, is intended to confer upon any
party, other than the parties hereto, and their respective successors and
assigns, any rights, remedies, obligations, or liabilities under or by reason of
this Option Agreement, except as expressly provided herein.

         (d) ASSIGNMENT. Other than as provided in Sections 8 and 9 hereof,
neither of the parties hereto may sell, transfer, assign or otherwise dispose of
any of its rights or obligations under this Option Agreement or the Option
created hereunder to any other person (whether by operation of law or
otherwise), without the express written consent of the other party.

         (e) NOTICES. All notices or other communications which are required or
permitted hereunder shall be in writing and sufficient if delivered in
accordance with Section 8.2 of the Merger Agreement (which is incorporated
herein by reference).

         (f) COUNTERPARTS. This Option Agreement may be executed in
counterparts, and each such counterpart shall be deemed to be an original
instrument, but both such counterparts together shall constitute but one
agreement.

         (g) SPECIFIC PERFORMANCE. The parties hereto agree that if for any
reason COFI or RCSB shall have failed to perform its obligations under this
Option Agreement, then either party hereto seeking to enforce this Option
Agreement against such non-performing party shall be entitled to specific
performance and injunctive and other equitable relief, and the parties hereto
further agree to waive any requirement for the securing or posting of any bond
in connection with the obtaining of any such injunctive or other equitable
relief. This provision is without prejudice to any other rights that either
party hereto may have against the other party hereto for any failure to perform
its obligations under this Option Agreement.

         (h) GOVERNING LAW. This Option Agreement shall be governed by and
construed in accordance with the laws of the State of Delaware applicable to
agreements made and entirely to be performed within such state. Nothing in this
Option Agreement shall be construed to require any party (or any subsidiary or
affiliate of any party) to take any action or fail to take any action in
violation of applicable law, rule or regulation.

                                       D-6


<PAGE>   146



         (i) REGULATORY APPROVALS; SECTION 16(b). If, in connection with (A) the
exercise of the Option under Section 3 or a sale by COFI to a third party under
Section 8, (B) a repurchase by RCSB under Section 7 or a repurchase or purchase
by RCSB under Section 8, prior notification to or approval of the OTS or any
other regulatory authority is required, then the required notice or application
for approval shall be promptly filed and expeditiously processed and periods of
time that otherwise would run pursuant to such Sections shall run instead from
the date on which any such required notification period has expired or been
terminated or such approval has been obtained, and in either event, any
requisite waiting period shall have passed. In the case of clause (A) of this
subsection (i), such filing shall be made by COFI, and in the case of clause (B)
of this subsection (i), such filing shall be made by RCSB, provided that each of
COFI and RCSB shall use its best efforts to make all filings with, and to obtain
consents of, all third parties and Regulatory Authorities necessary to the
consummation of the transactions contemplated hereby. Periods of time that
otherwise would run pursuant to Sections 3, 7 or 8 shall also be extended to the
extent necessary to avoid liability under Section 16(b) of the Exchange Act.

         (j) NO BREACH OF AGREEMENT AUTHORIZED. Nothing contained in this Option
Agreement shall be deemed to authorize RCSB to issue any shares of RCSB Common
Stock in breach of, or otherwise breach any of, the provisions of the Merger
Agreement.

         (k) 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 Option Agreement may not be modified, amended, altered or supplemented
except upon the execution and delivery of a written agreement executed by the
parties hereto.

         Each of the parties hereto has executed this Option Agreement as of the
date first written above.

                             CHARTER ONE FINANCIAL, INC.

                             By: /s/ Charles J. Koch
                                 -----------------------------------
                                 Name:    Charles J. Koch
                                 Title:   Chief Executive Officer

                             RCSB FINANCIAL, INC.

                             By: /s/ Leonard S. Simon
                                 -----------------------------------
                                 Name:    Leonard S. Simon
                                 Title:   Chief Executive Officer

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