MORGAN STANLEY DEAN WITTER & CO
424B3, 1999-07-07
FINANCE SERVICES
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PROSPECTUS Dated May 5, 1999                        Pricing Supplement No. 17 to
PROSPECTUS SUPPLEMENT                       Registration Statement No. 333-75289
Dated May 6, 1999                                             Dated July 1, 1999
                                                                  Rule 424(b)(3)


                                  $10,000,000
                        Morgan Stanley Dean Witter & Co.
                          MEDIUM-TERM NOTES, SERIES C
                            Senior Fixed Rate Notes

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

                     2% Exchangeable Notes due July 7, 2006
                   Exchangeable for Shares of Common Stock of
                             WELLS FARGO & COMPANY

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


Beginning October 1, 1999, you will be able to exchange your notes for a number
of shares of Wells Fargo common stock, subject to our right to call all of the
notes on or after July 7, 2002.

o    The principal amount and issue price of each note is $1,000.

o    We will pay interest at the rate of 2% per year on the $1,000 principal
     amount of each note. Interest will be paid semi-annually on each January 7
     and July 7, beginning January 7, 2000.

o    Beginning October 1, 1999, you will have the right to exchange each note
     for 19.3658 shares of Wells Fargo common stock. If you exchange, we will
     have the right to deliver either the actual shares or the cash value of
     such shares to you. You will not be entitled to any accrued but unpaid
     interest.

o    Beginning July 7, 2002, we have the right to call all of the notes and pay
     to you the call price of $1,000. However, if the market value of 19.3658
     shares of Wells Fargo common stock on the last trading day before we send
     our call notice is equal to or greater than $1,000, we will deliver to you
     19.3658 shares of Wells Fargo common stock per note instead.

o    If we decide to call the notes, we will give you notice at least 30 but
     not more than 60 days before the call date specified in the notice. If we
     notify you that we will be delivering shares of Wells Fargo common stock
     on the call date, rather than the cash call price, you will still be able
     to exercise your exchange right on any day prior to the call date.

o    If you hold the notes to maturity, we will pay $1,000 per note to you.

o    Wells Fargo is not involved in this offering of the notes in any way and
     will have no financial obligation with respect to the notes.

o    We will apply to list the notes to trade under the proposed symbol "MSWFC
     06" on the New York Stock Exchange, Inc.

You should read the more detailed description of the notes in this pricing
supplement. In particular, you should review and understand the descriptions in
"Summary of Pricing Supplement" and "Description of Notes."

The notes involve risks not associated with an investment in conventional debt
securities. See "Risk Factors" beginning on PS-6.
                            -----------------------
                        PRICE 100% AND ACCRUED INTEREST
                            -----------------------
                       Price to Public  Agent's Commissions  Proceeds to Company
                       ---------------  -------------------  -------------------

Per Note............        100%              0.25%                99.75%
Total...............     $10,000,000         $25,000             $9,975,000


                          MORGAN STANLEY DEAN WITTER
<PAGE>



                      (This page intentionally left blank)




                                      PS-2

<PAGE>



                         SUMMARY OF PRICING SUPPLEMENT

     The following summary describes the notes we are offering to you in
general terms only. You should read the summary together with the more detailed
information that is contained in the rest of this pricing supplement and in the
accompanying prospectus and prospectus supplement. You should carefully
consider, among other things, the matters set forth in "Risk Factors."

<TABLE>
<S>                                    <C>
                                       The Notes

Each note costs $1,000                 We, Morgan Stanley Dean Witter & Co., are offering 2% Exchangeable Notes
                                       due July 7, 2006, which you may exchange for Wells Fargo & Company
                                       common stock beginning on October 1, 1999.  The principal amount and  issue
                                       price of each note is $1,000.  We refer to Wells Fargo & Company common
                                       stock as Wells Fargo Stock.  If you hold the notes to maturity, which is July 7,
                                       2006, we will pay $1,000 per note to you.

2% interest on the                     We will pay interest on the notes, at the rate of 2% of the principal amount per
principal amount                       year, semi-annually on each January 7 and July 7, beginning January 7, 2000.

                                       Your Exchange Right

The exchange ratio                     Beginning October 1, 1999, you may exchange each note for a number of
is 19.3658                             shares of Wells Fargo Stock equal to the exchange ratio.  The exchange ratio is
                                       19.3658 shares of Wells Fargo Stock per note, subject to adjustment for certain
                                       corporate events relating to Wells Fargo & Company ("Wells Fargo").  When
                                       you exchange your notes, Morgan Stanley & Co. Incorporated or its successors,
                                       which we refer to as MS & Co., acting as calculation agent, will determine the
                                       exact number of shares you will receive based on the principal amount of the
                                       notes you exchange and the exchange ratio as it may have been adjusted through
                                       the time of the exchange.

                                       To exchange a note on any day, you must instruct your broker or other person
                                       with whom you hold your notes to take the following steps through normal
                                       clearing system channels:

                                       o fill out an Official Notice of Exchange, which is attached as Annex A to this
                                         pricing supplement;

                                       o deliver your Official Notice of Exchange to us before 11:00 a.m. (New
                                         York City time) on that day; and

                                       o deliver your note certificate to The Chase Manhattan Bank, as trustee for
                                         our senior notes, on that day.

                                       If you give us your Official Notice of Exchange after 11:00 a.m. (New York City
                                       time) on any day or at any time on a day when the stock markets are closed, your
                                       notice will not become effective until the next day that the stock markets are
                                       open.





                                                       PS-3

<PAGE>



We can choose to pay to you            We will pay to you, at our option, within 3 business days after you give us your
cash or Wells Fargo Stock if           Official Notice of Exchange, either:
you elect to exchange your
notes                                  o shares of Wells Fargo Stock, or

                                       o the cash value of such shares.

                                       We will not pay any accrued but unpaid interest if you elect to exchange your
                                       notes.

                                       Our right to call the notes may affect your ability to exchange your notes.

Our Call Right                         Beginning July 7, 2002, we have the right to call all of the notes.  If we call the
                                       notes, we will do the following:

                                       o send a notice announcing that we have decided to call the notes;

                                       o specify in the notice a call date when you will receive payment in exchange
                                         for delivering your notes to the trustee; that call date will not be less than
                                         30 or more than 60 days after the date of the notice; and

                                       o specify in the notice the number of shares of Wells Fargo Stock or the cash
                                         call price that we will pay to you in exchange for each note, as explained
                                         in the next paragraph.

We may call the notes                  On the last trading day before the date of our call notice, the calculation agent
for stock or cash,                     will determine the value of the shares of Wells Fargo Stock that a noteholder
depending on the price                 would receive upon exchange of a note.  That value is referred to as parity.  If
of Wells Fargo Stock                   parity is less than the call price of $1,000, then we will pay the call price to you
                                       in cash.  If we notify you that we will give you cash on the call date, you will no
                                       longer be able to exercise your exchange right.

                                       If, however, parity as so determined is equal to or greater than the call price, then
                                       we will deliver the shares of Wells Fargo Stock instead.  In that case, you will
                                       still have the right to exercise your exchange right on any day prior to the call
                                       date.

Wells Fargo Stock is                   The last reported sales price of Wells Fargo Stock on the New York Stock
currently $43.50 a share               Exchange, Inc. on the date of this pricing supplement was $43.50.  You can
                                       review the publicly-reported prices of Wells Fargo Stock for the last three years
                                       in the "Historical Information" section of this pricing supplement.

The Calculation Agent                  We have appointed MS & Co. to act as calculation agent for The Chase
                                       Manhattan Bank, the trustee for our senior notes.  As calculation agent, MS &
                                       Co. will determine the exchange ratio and calculate the amount of Wells Fargo
                                       Stock or cash that you receive if you exercise your exchange right or if we call
                                       the notes.  As calculation agent, MS & Co. will also adjust the exchange ratio for
                                       certain corporate events that could affect the price of the Wells Fargo Stock and
                                       that we describe in the section called "Description of Notes--Antidilution
                                       Adjustments" in this pricing supplement.

No Affiliation with                    Wells Fargo is not an affiliate of ours and is not involved with this offering in
Wells Fargo                            any way.  The notes are obligations of Morgan Stanley Dean Witter & Co. and
                                       not of Wells Fargo.





                                                       PS-4

<PAGE>



More Information                       The notes are senior notes issued as part of our Series C medium-term note
on the Notes                           program.  You can find a general description of our Series C medium-term note
                                       program in the accompanying prospectus supplement dated May 6, 1999.  We
                                       describe the basic features of this type of note in the sections called "Description
                                       of Notes--Fixed Rate Notes" and "--Exchangeable Notes."

                                       Because this is a summary, it does not contain all of the information that
                                       may be important to you, including the specific requirements for the
                                       exercise of your exchange right and of our call right.  You should read the
                                       "Description of Notes" section in this pricing supplement for a detailed
                                       description of the terms of the notes.  You should also read about some of
                                       the risks involved in investing in the notes in the section called "Risk
                                       Factors."  We urge you to consult with your investment, legal, accounting
                                       and other advisors with regards to any investment in the notes.

How to reach us                        You may contact us at our principal executive offices at 1585 Broadway, New
                                       York, New York 10036  (telephone number (212) 761-4000).
</TABLE>




                                                       PS-5

<PAGE>



                                  RISK FACTORS

     The notes are not secured debt and are riskier than ordinary debt
securities. This section describes the most significant risks relating to the
notes. You should carefully consider whether the notes are suited to your
particular circumstances before you decide to purchase them.

<TABLE>
<S>                                   <C>
Yield to Maturity Less Than           These notes pay interest at the rate of 2% of the principal amount per year.  This
Interest on Ordinary Notes            interest rate is lower than the interest rate that we would pay on non-exchangeable
                                      senior notes maturing at the same time as the notes.  If you exchange your notes for
                                      Wells Fargo Stock or if we call the notes, you will not be entitled to any accrued
                                      but unpaid interest.

Notes May Not Be                      There may be little or no secondary market for the notes.  Although we will apply
Actively Traded                       to list the notes on the New York Stock Exchange, Inc., the listing has not been
                                      approved.  Even if there is a secondary market, it may not provide enough liquidity
                                      to allow you to trade or sell the notes easily.  MS & Co. currently intends to act as
                                      a market maker for the notes, but is not required to do so.

Market Price of Notes                 Several factors, many of which are beyond our control, will influence the value of
Influenced by Many                    the notes, including:
Unpredictable Factors
                                      o the market price of Wells Fargo Stock

                                      o the volatility (frequency and magnitude of changes in price) of the Wells
                                        Fargo Stock

                                      o the dividend rate on the Wells Fargo Stock

                                      o economic, financial, political and regulatory or judicial events that affect stock
                                        markets generally and which may affect the market price of the Wells Fargo
                                        Stock

                                      o interest and yield rates in the market

                                      o the time remaining until (1) you can exchange your notes for stock, (2) we can
                                        call the notes and (3) the notes mature

                                      o our creditworthiness

                                      These factors will influence the price that you will receive if you sell your notes
                                      prior to maturity.  For example, you may have to sell your notes at a substantial
                                      discount from the issue price if the market price of the Wells Fargo Stock is at,
                                      below or not sufficiently above the price of Wells Fargo Stock at pricing.

                                      You cannot predict the future performance of Wells Fargo Stock based on its
                                      historical performance.



                                                       PS-6

<PAGE>



No Affiliation with                   We are not affiliated with Wells Fargo.  We or our affiliates may presently or from
Wells Fargo                           time to time engage in business with Wells Fargo, including entering into loans
                                      with, or making equity investments in, Wells Fargo or its affiliates or subsidiaries
                                      or providing investment advisory services to Wells Fargo, including merger and
                                      acquisition advisory services.  In the course of our business, we or our affiliates
                                      may acquire non-public information about Wells Fargo.  Moreover, we have no
                                      ability to control or predict the actions of Wells Fargo, including any corporate
                                      actions of the type that would require the calculation agent to adjust the exchange
                                      ratio.  Wells Fargo is not involved in the offering of the notes in any way and has
                                      no obligation to consider your interest as an owner of these notes in taking any
                                      corporate actions that might affect the value of your notes.  None of the money you
                                      pay for the notes will go to Wells Fargo.

You Have No                           As an owner of notes, you will not have voting rights or the right to receive
Shareholder Rights                    dividends or other distributions or any other rights with respect to Wells Fargo
                                      Stock.

Limited Antidilution                  MS & Co., as calculation agent, will adjust the exchange ratio for certain events
Adjustments                           affecting the Wells Fargo Stock, such as stock splits and stock dividends, and
                                      certain other corporate actions involving Wells Fargo, such as mergers.  However,
                                      the calculation agent is not required to make an adjustment for every corporate
                                      event that can affect Wells Fargo Stock.  For example, the calculation agent is not
                                      required to make any adjustments if Wells Fargo or anyone else makes a partial
                                      tender offer or a partial exchange offer for Wells Fargo Stock.  If an event occurs
                                      that does not require the calculation agent to adjust the exchange rate, the market
                                      price of the notes may be materially and adversely affected.  In addition, the
                                      calculation agent may, but is not required to, make adjustments for corporate events
                                      that can affect the Wells Fargo Stock other than those contemplated in this pricing
                                      supplement.  Such adjustments will be made to reflect the consequences of events
                                      but not with the aim of changing relative investment risk.  The determination by the
                                      calculation agent to adjust, or not to adjust, the exchange ratio may materially and
                                      adversely affect the market price of the notes.

Potential Conflicts of                As calculation agent, MS & Co. will calculate how many shares of Wells Fargo
Interest between You and              Stock you will receive in exchange for your notes and what adjustments should be
the Calculation Agent and             made to the exchange ratio to reflect certain corporate and other events.  MS & Co.
Other Affiliates of Ours              and other affiliates may carry out hedging activities related to the notes or to other
                                      instruments, including trading in Wells Fargo Stock as well as in other instruments
                                      related to Wells Fargo Stock.  MS & Co. and some of our subsidiaries also trade
                                      Wells Fargo Stock on a regular basis as part of their general broker-dealer
                                      businesses.  Any of these activities and MS & Co.'s affiliation with us could
                                      influence MS & Co.'s determinations as calculation agent, including with respect
                                      to adjustments to the exchange ratio, and, accordingly, the amount of stock or cash
                                      that you receive when you exchange the notes or when we call the notes.  In
                                      addition, such trading activity could potentially affect the price of Wells Fargo
                                      Stock and, thereby, the value of the Wells Fargo Stock or cash you will receive
                                      upon exchange or redemption.




                                                       PS-7

<PAGE>



Tax Treatment                         You should also consider the tax consequences of investing in the notes.  If you
                                      are a U.S. taxable investor, you will be subject to annual income tax based on
                                      the comparable yield of the notes, which will be higher than the 2% interest
                                      rate that is actually payable on the notes.  In addition, any gain recognized by
                                      U.S. taxable investors on the sale, exchange or retirement of the notes will be
                                      treated as ordinary income.  Please read carefully the section "Description of
                                      Notes--United States Federal Taxation" in this pricing supplement and the
                                      section "United States Federal Taxation--Notes--Optionally Exchangeable
                                      Notes" in the accompanying prospectus supplement.
</TABLE>





                                                       PS-8

<PAGE>



                              DESCRIPTION OF NOTES

     Terms not defined herein have the meanings given to such terms in the
accompanying prospectus supplement. The term "Note" refers to each $1,000
principal amount of our 2% Exchangeable Notes due July 7, 2006 (Exchangeable
for Shares of Common Stock of Wells Fargo & Company). In this pricing
supplement, the terms "MSDW," "we," "us" and "our" refer to Morgan Stanley Dean
Witter & Co.

Principal Amount..............   $10,000,000

Maturity Date.................   July 7, 2006

Specified Currency............   U.S. Dollars

Issue Price...................   100%

Interest Rate.................   2% per annum

Interest Payment Dates........   January 7 and July 7, beginning January 7,
                                 2000

Original Issue Date
(Settlement Date).............   July 7, 1999

CUSIP.........................   617446DL0

Minimum Denominations.........   $1,000

Exchange Right................   On any Exchange Date, you will be entitled
                                 upon (i) your completion and delivery to us
                                 and the Calculation Agent of an Official
                                 Notice of Exchange (in the form of Annex A
                                 attached hereto) prior to 11:00 a.m. New York
                                 City time on such date and (ii) delivery on
                                 such date of your Notes to the Trustee, to
                                 exchange each Note for 19.3658 shares (the
                                 "Exchange Ratio") of Wells Fargo Stock,
                                 subject to adjustment as described under
                                 "--Antidilution Adjustments" below.  You will
                                 not, however, be entitled to exchange your
                                 Notes if we have previously called the Notes
                                 for the cash Call Price as described under
                                 "--Company Call Right" below.

                                 Upon any such exchange, we may, at our sole
                                 option, either deliver such shares of Wells
                                 Fargo Stock or pay an amount in cash equal to
                                 the Exchange Ratio times the Market Price of
                                 Wells Fargo Stock on the Exchange Date, as
                                 determined by the Calculation Agent, in lieu
                                 of such shares.  Such delivery or payment
                                 will be made 3 business days after any
                                 Exchange Date, subject to delivery of such
                                 Notes to the Trustee on the Exchange Date.

                                 Upon any exercise of the Exchange Right, you
                                 will not be entitled to any cash payment
                                 representing any accrued but unpaid interest
                                 on the Notes.  If you exchange your Notes
                                 after a record date for the payment of
                                 interest and prior to the next succeeding
                                 Interest Payment Date, the Notes that you
                                 exchange must be accompanied by funds equal
                                 to the interest payable on the succeeding
                                 Interest Payment Date on the principal amount
                                 that you exchange.




                                      PS-0

<PAGE>



                                 We will, or will cause the Calculation Agent
                                 to, deliver such shares of Wells Fargo Stock
                                 or cash to the Trustee for delivery to you.

No Fractional Shares .........   If upon any exchange of the Notes we deliver
                                 shares of Wells Fargo Stock, we will pay cash
                                 in lieu of delivering fractional shares of
                                 Wells Fargo Stock in an amount equal to the
                                 corresponding fractional Market Price of
                                 Wells Fargo Stock as determined by the
                                 Calculation Agent on such Exchange Date.

Exchange Ratio ...............   19.3658, subject to adjustment for certain
                                 corporate events relating to Wells Fargo &
                                 Company.  See "--Antidilution Adjustments"
                                 below.

Exchange Date.................   Any Trading Day that falls during the period
                                 beginning October 1, 1999 and ending on the
                                 day prior to the earliest of (i) the Maturity
                                 Date, (ii) the Call Date and (iii) in the
                                 event of a call for the cash Call Price as
                                 described under "--Company Call Right" below,
                                 the Company Notice Date.

Company Call Right ...........   On or after July 7, 2002, we may call the
                                 Notes, in whole but not in part, for
                                 mandatory exchange into Wells Fargo Stock at
                                 the Exchange Ratio; provided that, if Parity
                                 on the Trading Day immediately preceding the
                                 Company Notice Date, as determined by the
                                 Calculation Agent, is less than the Call
                                 Price, we will (under those circumstances
                                 only) pay the Call Price in cash on the Call
                                 Date.  If we call the Notes for mandatory
                                 exchange, then, unless you subsequently
                                 exercise the Exchange Right (the exercise of
                                 which will not be available to you following
                                 a call for cash in an amount equal to the
                                 Call Price), the Wells Fargo Stock or (in the
                                 event of a call for cash, as described above)
                                 cash to be delivered to you will be delivered
                                 on the Call Date fixed by us and set forth in
                                 our notice of mandatory exchange, upon
                                 delivery of your Notes to the Trustee.  We
                                 will, or will cause the Calculation Agent to,
                                 deliver such shares of Wells Fargo Stock or
                                 cash to the Trustee for delivery to you.  You
                                 will not be entitled to any accrued but
                                 unpaid interest on the Notes.

                                 On or after the Company Notice Date (other
                                 than with respect to a call of the Notes for
                                 the cash Call Price by the Company) you will
                                 continue to be entitled to exercise the
                                 Exchange Right and receive any amounts
                                 described under "--Exchange Right" above.

Company Notice Date...........   The scheduled Trading Day on which we issue
                                 our notice of mandatory exchange, which must
                                 be at least 30 but no more than 60 days prior
                                 to the Call Date.

Call Date.....................   The scheduled Trading Day on or after July 7,
                                 2002 specified by us in our notice of
                                 mandatory exchange on which we will deliver
                                 Wells Fargo Stock or cash to holders of the
                                 Notes for mandatory exchange.

Parity........................   With respect to any Trading Day, an amount
                                 equal to the Exchange Ratio times the Market
                                 Price (as defined below) of Wells Fargo Stock
                                 on such Trading Day.




                                     PS-10

<PAGE>



Call Price....................   $1,000 per Note

Market Price..................   If Wells Fargo Stock (or any other security
                                 for which a Market Price must be determined)
                                 is listed on a national securities exchange,
                                 is a security of The Nasdaq National Market
                                 or is included in the OTC Bulletin Board
                                 Service ("OTC Bulletin Board") operated by the
                                 National Association of Securities Dealers,
                                 Inc. (the "NASD"), the Market Price for one
                                 share of Wells Fargo Stock (or one unit of any
                                 such other security) on any Trading Day means
                                 (i) the last reported sale price, regular
                                 way, on such day on the principal United
                                 States securities exchange registered under
                                 the Securities Exchange Act of 1943, as
                                 modified (the "Exchange Act"), on which Wells
                                 Fargo Stock (or any such other security) is
                                 listed or admitted to trading or (ii) if not
                                 listed or admitted to trading on any such
                                 securities exchange or if such last reported
                                 sale price is not obtainable (even if Wells
                                 Fargo Stock (or other such security) is
                                 listed or admitted to trading on such
                                 securities exchanges), the last reported sale
                                 price on the over-the-counter market as
                                 reported on the Nasdaq National Market or OTC
                                 Bulletin Board on such day.  If the last
                                 reported sale price is not available pursuant
                                 to clause (i) or (ii) of the preceding
                                 sentence because of a Market Disruption or
                                 otherwise, the Market Price for any Trading
                                 Day shall be the mean, as determined by the
                                 Calculation Agent, of the bid prices for
                                 Wells Fargo Stock (or any such other
                                 security) obtained from as many dealers in
                                 such security (which may include MS & Co. or
                                 any of our other subsidiaries or affiliates),
                                 but not exceeding three, as will make such
                                 bid prices available to the Calculation
                                 Agent.  A "security of the Nasdaq National
                                 Market" shall include a security included in
                                 any successor to such system and the term
                                 "OTC Bulletin Board Service" shall include
                                 any successor service thereto.

Trading Day...................   A day, as determined by the Calculation
                                 Agent, on which trading is generally
                                 conducted on the New York Stock Exchange, Inc.
                                 ("NYSE"), the American Stock Exchange, Inc.,
                                 the Nasdaq National Market, the Chicago
                                 Mercantile Exchange, the Chicago Board of
                                 Options Exchange and in the over-the-counter
                                 market for equity securities in the United
                                 States and on which a Market Disruption Event
                                 has not occurred.

Book Entry Note or
Certificated Note.............   Book Entry, DTC

Senior Note or Subordinated
Note..........................   Senior

Trustee.......................   The Chase Manhattan Bank

Agent for this Underwritten
Offering of Notes.............   MS & Co.

Calculation Agent.............   MS & Co.

                                 All determinations made by the Calculation
                                 Agent will be at the sole discretion of the
                                 Calculation Agent and will, in the absence of



                                     PS-11

<PAGE>



                                 manifest error, be conclusive for all
                                 purposes and binding on you and on us.

                                 Because the Calculation Agent is our
                                 affiliate, potential conflicts of interest
                                 may exist between the Calculation Agent and
                                 you as an owner of the Notes, including with
                                 respect to certain determinations and
                                 judgments that the Calculation Agent must
                                 make in making adjustments to the Exchange
                                 Ratio or other antidilution adjustments or
                                 determining the Market Price or whether a
                                 Market Disruption Event has occurred.  See
                                 "Antidilution Adjustments" and "Market
                                 Disruption Event" below.  MS & Co. is
                                 obligated to carry out its duties and
                                 functions as Calculation Agent in good faith
                                 and using its reasonable judgment.

Antidilution Adjustments......   The Exchange Ratio will be adjusted as
                                 follows:

                                 1. If Wells Fargo Stock is subject to a stock
                                 split or reverse stock split, then once such
                                 split has become effective, the Exchange Ratio
                                 will be adjusted to equal the product of the
                                 prior Exchange Ratio and the number of shares
                                 issued in such stock split or reverse stock
                                 split with respect to one share of Wells
                                 Fargo Stock.

                                 2. If Wells Fargo Stock is subject (i) to a
                                 stock dividend (issuance of additional shares
                                 of Wells Fargo Stock) that is given ratably
                                 to all holders of shares of Wells Fargo Stock
                                 or (ii) to a distribution of Wells Fargo
                                 Stock as a result of the triggering of any
                                 provision of the corporate charter of Wells
                                 Fargo, then once the dividend has become
                                 effective and Wells Fargo Stock is trading
                                 ex-dividend, the Exchange Ratio will be
                                 adjusted so that the new Exchange Ratio shall
                                 equal the prior Exchange Ratio plus the
                                 product of (i) the number of shares issued
                                 with respect to one share of Wells Fargo
                                 Stock and (ii) the prior Exchange Ratio.

                                 3. There will be no adjustments to the
                                 Exchange Ratio to reflect cash dividends or
                                 other distributions paid with respect to Wells
                                 Fargo Stock other than distributions described
                                 in paragraph 6 below and Extraordinary
                                 Dividends as described below. A cash dividend
                                 or other distribution with respect to Wells
                                 Fargo Stock will be deemed to be an
                                 "Extraordinary Dividend" if such dividend or
                                 other distribution exceeds the immediately
                                 preceding non-Extraordinary Dividend for Wells
                                 Fargo Stock (as adjusted for any subsequent
                                 corporate event requiring an adjustment
                                 hereunder, such as a stock split or reverse
                                 stock split) by an amount equal to at least
                                 10% of the Market Price of Wells Fargo Stock
                                 on the Trading Day preceding the ex-dividend
                                 date for the payment of such Extraordinary
                                 Dividend (the "ex-dividend date"). If an
                                 Extraordinary Dividend occurs with respect to
                                 Wells Fargo Stock, the Exchange Ratio with
                                 respect to Wells Fargo Stock will be adjusted
                                 on the ex-dividend date with respect to such
                                 Extraordinary Dividend so that the new
                                 Exchange Ratio will equal the product of (i)
                                 the then current Exchange Ratio and (ii) a
                                 fraction, the numerator of which is the Market
                                 Price on the Trading Day preceding the
                                 ex-dividend date, and the denominator of



                                     PS-12

<PAGE>



                                 which is the Market Price on the Trading Day
                                 preceding the ex-dividend date, and the
                                 denominator of which is the amount by which
                                 the Market Price on the Trading Day preceding
                                 the ex-dividend date exceeds the Extraordinary
                                 Dividend Amount. The "Extraordinary Dividend
                                 Amount" with respect to an Extraordinary
                                 Dividend for Wells Fargo Stock will equal (i)
                                 in the case of cash dividends or other
                                 distributions that constitute quarterly
                                 dividends, the amount per share of such
                                 Extraordinary Dividend minus the amount per
                                 share of the immediately preceding
                                 non-Extraordinary Dividend for Wells Fargo
                                 Stock or (ii) in the case of cash dividends or
                                 other distributions that do not constitute
                                 quarterly dividends, the amount per share of
                                 such Extraordinary Dividend. To the extent an
                                 Extraordinary Dividend is not paid in cash,
                                 the value of the non-cash component will be
                                 determined by the Calculation Agent, whose
                                 determination shall be conclusive. A
                                 distribution on the Wells Fargo Stock
                                 described in paragraph 6 below that also
                                 constitutes an Extraordinary Dividend shall
                                 only cause an adjustment to the Exchange Ratio
                                 pursuant to paragraph 6.

                                 4. If Wells Fargo is being liquidated or is
                                 subject to a proceeding under any applicable
                                 bankruptcy, insolvency or other similar law,
                                 the Notes will continue to be exchangeable
                                 into Wells Fargo Stock so long as a Market
                                 Price for Wells Fargo Stock is available.  If
                                 a Market Price is no longer available for
                                 Wells Fargo Stock for whatever reason,
                                 including the liquidation of Wells Fargo or
                                 the subjection of Wells Fargo to a proceeding
                                 under any applicable bankruptcy, insolvency
                                 or other similar law, then the value of Wells
                                 Fargo Stock will equal zero for so long as no
                                 Market Price is available.

                                 5. If there occurs any reclassification or
                                 change of Wells Fargo Stock, including,
                                 without limitation, as a result of the
                                 issuance of tracking stock by Wells Fargo, or
                                 if Wells Fargo has been subject to a merger,
                                 combination or consolidation and is not the
                                 surviving entity, or if there occurs a sale
                                 or conveyance to another corporation of the
                                 property and assets of Wells Fargo as an
                                 entirety or substantially as an entirety, in
                                 each case as a result of which the holders of
                                 Wells Fargo Stock shall be entitled to
                                 receive stock, other securities or other
                                 property or assets (including, without
                                 limitation, cash or other classes of stock of
                                 Wells Fargo) ("Exchange Property") with
                                 respect to or in exchange for such Wells
                                 Fargo Stock, then the holders of the Notes
                                 then outstanding will be entitled thereafter
                                 to exchange such Notes into the kind and
                                 amount of Exchange Property that they would
                                 have owned or been entitled to receive upon
                                 such reclassification, change, merger,
                                 combination, consolidation, sale or
                                 conveyance had such holders exchanged such
                                 Notes at the then current Exchange Ratio for
                                 Wells Fargo Stock immediately prior to any
                                 such corporate event, but without interest
                                 thereon.

                                 6. If Wells Fargo issues to all of its
                                 shareholders equity securities of an issuer
                                 other than Wells Fargo (other than in a
                                 transaction described in paragraph 5 above),
                                 then the holders of the Notes then
                                 outstanding will be entitled to receive such
                                 new equity securities upon exchange of such
                                 Notes.  The Exchange Ratio for such new
                                 equity securities will equal the product of
                                 the Exchange Ratio in effect for Wells Fargo
                                 Stock at the time of the issuance of such new



                                     PS-13

<PAGE>



                                 equity securities times the number of shares
                                 of the new equity securities issued with
                                 respect to one share of Wells Fargo Stock.

                                 7. No adjustments to the Exchange Ratio will
                                 be required other than those specified above.
                                 However, we may, at our sole discretion,
                                 cause the Calculation Agent to make
                                 additional changes to the Exchange Ratio upon
                                 the occurrence of corporate or other similar
                                 events that affect or could potentially
                                 affect market prices of, or shareholders'
                                 rights in, the Wells Fargo Stock (or other
                                 Exchange Property) but only to reflect such
                                 changes, and not with the aim of changing
                                 relative investment risk.

                                 No adjustments to the Exchange Ratio will be
                                 required unless such adjustment would require
                                 a change of at least 0.1% in the Exchange
                                 Ratio then in effect.  The Exchange Ratio
                                 resulting from any of the adjustments
                                 specified above will be rounded to the
                                 nearest one hundred-thousandth with five
                                 one-millionths being rounded upward.

                                 The Exchange Ratio will not be adjusted to
                                 take into account the accrual of Stated OID.

                                 The Calculation Agent shall be solely
                                 responsible for the determination and
                                 calculation of any adjustments to the Exchange
                                 Ratio and of any related determinations and
                                 calculations with respect to any
                                 distributions of stock, other securities or
                                 other property or assets (including cash) in
                                 connection with any corporate event described
                                 in paragraph 5 or 6 above, and its
                                 determinations and calculations with respect
                                 thereto shall be conclusive.

                                 The Calculation Agent will provide
                                 information as to any adjustments to the
                                 Exchange Ratio upon written request by any
                                 holder of the Notes.

Market Disruption Event.......   "Market Disruption Event" means, with respect
                                 to Wells Fargo Stock, the occurrence or
                                 existence of any of the following events as
                                 determined by the Calculation Agent:

                                    (i) a suspension, absence or material
                                    limitation of trading of Wells Fargo Stock
                                    on the primary market for Wells Fargo Stock
                                    for more than two hours of trading or
                                    during the one-half hour period preceding
                                    the close of trading in such market; or a
                                    breakdown or failure in the price and
                                    trade reporting systems of the primary
                                    market for Wells Fargo Stock as a result
                                    of which the reported trading prices for
                                    Wells Fargo Stock during the last one-half
                                    hour preceding the closing of trading in
                                    such market are materially inaccurate; or
                                    the suspension, absence or material
                                    limitation on the primary market for
                                    trading in options contracts related to
                                    Wells Fargo Stock, if available, during
                                    the one-half hour period preceding the
                                    close of trading in the applicable market;
                                    and



                                     PS-14

<PAGE>



                                    (ii) a determination by the Calculation
                                    Agent in its sole discretion that any
                                    event described in clause (i) above
                                    materially interfered with the ability of
                                    MSDW or any of its affiliates to unwind
                                    all or a material portion of the hedge
                                    with respect to the Notes.

                                 For purposes of determining whether a Market
                                 Disruption Event has occurred: (1) a
                                 limitation on the hours or number of days of
                                 trading will not constitute a Market
                                 Disruption Event if it results from an
                                 announced change in the regular business
                                 hours of the relevant exchange, (2) a
                                 decision to permanently discontinue trading
                                 in the relevant option contract will not
                                 constitute a Market Disruption Event, (3)
                                 limitations pursuant to NYSE Rule 80A (or any
                                 applicable rule or regulation enacted or
                                 promulgated by the NYSE, any other
                                 self-regulatory organization or the
                                 Securities and Exchange Commission of similar
                                 scope as determined by the Calculation Agent)
                                 on trading during significant market
                                 fluctuations shall constitute a suspension,
                                 absence or material limitation of trading,
                                 (4) a suspension of trading in an options
                                 contract on Wells Fargo Stock by the primary
                                 securities market trading in such options, if
                                 available, by reason of (x) a price change
                                 exceeding limits set by such securities
                                 exchange or market, (y) an imbalance of orders
                                 relating to such contracts or (z) a disparity
                                 in bid and ask quotes relating to such
                                 contracts will constitute a suspension,
                                 absence or material limitation of trading in
                                 options contracts related to Wells Fargo
                                 Stock and (5) a suspension, absence or
                                 material limitation of trading on the primary
                                 securities market on which options contracts
                                 related to Wells Fargo Stock are traded will
                                 not include any time when such securities
                                 market is itself closed for trading under
                                 ordinary circumstances.

Alternate Exchange Calculation
in case of an Event of Default   In case an Event of Default with respect to
                                 the Notes shall have occurred and be
                                 continuing, the amount declared due and
                                 payable upon any acceleration of any Note
                                 shall be determined by MS & Co., as
                                 Calculation Agent, and shall be equal to the
                                 principal amount of the Note plus any accrued
                                 and unpaid interest at the Interest Rate to
                                 but not including the date of acceleration;
                                 provided that if (x) the holder of a Note has
                                 submitted an Official Notice of Exchange to us
                                 in accordance with the Exchange Right or (y)
                                 we have called the Notes, other than a call
                                 for the cash Call Price, in accordance with
                                 the Company Call Right, the amount declared
                                 due and payable upon any such acceleration
                                 shall be an amount in cash for each $1,000
                                 principal amount of a Note equal to the
                                 Exchange Ratio times the Market Price of one
                                 share of Wells Fargo Stock, determined by the
                                 Calculation Agent as of the Exchange Date or
                                 as of the date of acceleration, respectively,
                                 and shall not include any accrued and unpaid
                                 interest thereon; provided further that if
                                 the Issuer has called the Notes for cash in
                                 an amount equal to the Call Price, in
                                 accordance with the Company Call Right, the
                                 amount declared due and payable upon any such
                                 acceleration shall be an amount in cash for
                                 each $1,000 principal amount of a Note equal
                                 to the Call Price.



                                     PS-15

<PAGE>



Wells Fargo Stock;
Public Information............   Wells Fargo & Company is a diversified
                                 financial services company organized under
                                 the laws of Delaware and registered under the
                                 Bank Holding Company Act (BHC Act) of 1956,
                                 as amended.  Wells Fargo Stock is registered
                                 under the Exchange Act.  Companies with
                                 securities registered under the Exchange Act
                                 are required to file periodically certain
                                 financial and other information specified by
                                 the Securities and Exchange Commission (the
                                 "Commission").  Information provided to or
                                 filed with the Commission can be inspected
                                 and copied at the public reference facilities
                                 maintained by the Commission at Room 1024,
                                 450 Fifth Street, N.W., Washington, D.C.
                                 20549 or at its Regional Offices located at
                                 Suite 1400, Citicorp Center, 500 West Madison
                                 Street, Chicago, Illinois 60661 and at Seven
                                 World Trade Center, 13th Floor, New York, New
                                 York 10048, and copies of such material can
                                 be obtained from the Public Reference Section
                                 of the Commission, 450 Fifth Street, N.W.,
                                 Washington, D.C. 20549, at prescribed rates.
                                 In addition, information provided to or filed
                                 with the Commission electronically can be
                                 accessed through a website maintained by the
                                 Commission.  The address of the Commission's
                                 website is http://www.sec.gov.  Information
                                 provided to or filed with the Commission by
                                 Wells Fargo pursuant to the Exchange Act can
                                 be located by reference to Commission file
                                 number 1-2979.  In addition, information
                                 regarding Wells Fargo may be obtained from
                                 other sources including, but not limited to,
                                 press releases, newspaper articles and other
                                 publicly disseminated documents.  We make no
                                 representation or warranty as to the accuracy
                                 or completeness of such information.

                                 This pricing supplement relates only to the
                                 Notes offered hereby and does not relate to
                                 Wells Fargo Stock or other securities of
                                 Wells Fargo.  We have derived all disclosures
                                 contained in this pricing supplement
                                 regarding Wells Fargo from the publicly
                                 available documents described in the
                                 preceding paragraph.  Neither we nor the
                                 Agent has participated in the preparation of
                                 such documents or made any due diligence
                                 inquiry with respect to Wells Fargo in
                                 connection with the offering of the Notes.
                                 Neither we nor the Agent makes any
                                 representation that such publicly available
                                 documents or any other publicly available
                                 information regarding Wells Fargo are
                                 accurate or complete.  Furthermore, we cannot
                                 give any assurance that all events occurring
                                 prior to the date hereof (including events
                                 that would affect the accuracy or
                                 completeness of the publicly available
                                 documents described in the preceding
                                 paragraph) that would affect the trading
                                 price of Wells Fargo Stock (and therefore the
                                 Initial Wells Fargo Price and the Exchange
                                 Ratio) have been publicly disclosed.
                                 Subsequent disclosure of any such events or
                                 the disclosure of or failure to disclose
                                 material future events concerning Wells Fargo
                                 could affect the value received on any
                                 Exchange Date or Call Date with respect to
                                 the Notes and therefore the trading prices of
                                 the Notes.




                                     PS-16

<PAGE>



                                 Neither we nor any of our affiliates makes
                                 any representation to you as to the
                                 performance of Wells Fargo Stock.

                                 We or our affiliates may presently or from
                                 time to time engage in business with Wells
                                 Fargo, including extending loans to, or making
                                 equity investments in, Wells Fargo or
                                 providing advisory services to Wells Fargo,
                                 including merger and acquisition advisory
                                 services. In the course of such business, we
                                 or our affiliates may acquire non-public
                                 information with respect to Wells Fargo and,
                                 in addition, one or more of our affiliates may
                                 publish research reports with respect to Wells
                                 Fargo. The statement in the preceding sentence
                                 is not intended to affect the rights of
                                 holders of the Notes under the securities
                                 laws. As a prospective purchaser of a Note,
                                 you should undertake such an independent
                                 investigation of Wells Fargo as in your
                                 judgment is appropriate to make an informed
                                 decision with respect to an investment in
                                 Wells Fargo Stock.

Historical Information........   The following table sets forth the published
                                 high and low Market Price during 1996, 1997,
                                 1998 and during 1999 through July 1, 1999.
                                 The Market Price on July 1, 1999 was $43.50.
                                 We obtained the Market Prices listed below
                                 from Bloomberg Financial Markets and we
                                 believe such information to be accurate.  You
                                 should not take the historical prices of
                                 Wells Fargo Stock as an indication of future
                                 performance.  We cannot give any assurance
                                 that the price of Wells Fargo Stock will
                                 increase sufficiently to cause the beneficial
                                 owners of the Notes to receive an amount in
                                 excess of the principal amount on any
                                 Exchange Date or Call Date

<TABLE>
                                                                                                       Dividends
                                 Wells Fargo                                     High       Low        per Share
                                 -----------                                     ----       ---        ---------
                                 (CUSIP 949746101)
                                 <S>                                           <C>       <C>            <C>
                                 1996
                                 First Quarter................................ $ 18 1/2  $ 15 1/2       $  .12
                                 Second Quarter...............................   18 3/4    16 15/16        .135
                                 Third Quarter................................   20 3/8    16 1/4          .135
                                 Fourth Quarter...............................   23 3/8    21              .135
                                 1997
                                 First Quarter................................   26 1/2    21 5/8          .15
                                 Second Quarter...............................   29 7/16   22 3/8          .15
                                 Third Quarter................................   32 1/8    28 1/2          .15
                                 Fourth Quarter...............................   38 7/8    31 1/16         .165
                                 1998
                                 First Quarter................................   43 7/16   35 9/16         .165
                                 Second Quarter...............................   43 1/8    34 1/4          .165
                                 Third Quarter................................   39 3/8    29 3/4          .185
                                 Fourth Quarter...............................   40 5/8    31 5/8          .185
                                 1999
                                 First Quarter................................   40 3/16   32 3/4          .185
                                 Second Quarter                                  44        36 11/16        .20
                                 Third Quarter
                                   (through July 1, 1999).....................   43.50     43.50         43.50
</TABLE>

                                 Historical prices have been adjusted for a 2
                                 for 1 stock split of Wells Fargo Stock, which
                                 became effective in the third quarter of
                                 1997.



                                     PS-17

<PAGE>



                                 We make no representation as to the amount of
                                 dividends, if any, that Wells Fargo will pay
                                 in the future.  In any event, as an owner of
                                 a Note, you will not be entitled to receive
                                 dividends, if any, that may be payable on
                                 Wells Fargo Stock.

Use of Proceeds and Hedging...   The net proceeds we receive from the sale of
                                 the Notes will be used for general corporate
                                 purposes and, in part, by us or one or more of
                                 our affiliates in connection with hedging our
                                 obligations under the Notes.  See also "Use
                                 of Proceeds" in the accompanying prospectus.

                                 On or prior to the date of this pricing
                                 supplement, we, through our subsidiaries and
                                 others, hedged our anticipated exposure in
                                 connection with the Notes by taking positions
                                 in Wells Fargo Stock and positions in other
                                 instruments in connection with such hedging.
                                 Such hedging was carried out in a manner
                                 designed to minimize any impact on the price
                                 of Wells Fargo Stock.  Our purchase activity
                                 could potentially have increased the price of
                                 Wells Fargo Stock, and therefore effectively
                                 have increased the level to which Wells Fargo
                                 Stock must rise before you would receive an
                                 amount of Wells Fargo Stock worth as much or
                                 more than the accreted principal amount of
                                 your Notes on any Exchange Date or Call Date.
                                 Through our subsidiaries, we are likely to
                                 modify our hedge position throughout the life
                                 of the Notes by purchasing and selling Wells
                                 Fargo Stock, options contracts on Wells Fargo
                                 Stock listed on major securities markets or
                                 positions in other securities or instruments
                                 that we may wish to use in connection with
                                 such hedging.  Although we have no reason to
                                 believe that our hedging activity or other
                                 trading activities that we, or any of our
                                 affiliates, engaged in or may engage in has
                                 had or will have a material impact on the
                                 price of Wells Fargo Stock, we cannot give
                                 any assurance that we have not or will not
                                 affect such price as a result of our hedging
                                 or trading activities.

Supplemental Information
Concerning Plan of
Distribution..................   In order to facilitate the offering of the
                                 Notes, the Agent may engage
                                 in transactions that stabilize, maintain or
                                 otherwise affect the price of the Notes or
                                 the Wells Fargo Stock.  Specifically, the
                                 Agent may overallot in connection with the
                                 offering, creating a short position in the
                                 Notes for its own account.  In addition, to
                                 cover allotments or to stabilize the price of
                                 the Notes, the Agent may bid for, and
                                 purchase, the Notes or the Wells Fargo Stock
                                 in the open market.  See "Use of Proceeds and
                                 Hedging" above.

                                 We have agreed to indemnify the Agent against
                                 certain liabilities under the Securities Act
                                 of 1933, as amended.

ERISA Matters for Pension
Plans And Insurance
Companies.....................   We and certain of our affiliates, including
                                 MS & Co. and Dean Witter Reynolds Inc.
                                 ("DWR"), may each be considered a "party in
                                 interest" within the meaning of the Employee
                                 Retirement Income Security Act of 1974, as
                                 amended ("ERISA"), or a "disqualified person"
                                 within the meaning of the Internal Revenue
                                 Code of 1986, as amended (the "Code") with
                                 respect to many employee benefit



                                     PS-18

<PAGE>



                                 plans. Prohibited transactions within the
                                 meaning of ERISA or the Code may arise, for
                                 example, if the Notes are acquired by or with
                                 the assets of a pension or other employee
                                 benefit plan with respect to which MS & Co.,
                                 DWR or any of their affiliates is a service
                                 provider, unless the Notes are acquired
                                 pursuant to an exemption from the prohibited
                                 transaction rules.

                                 The acquisition of the Notes may be eligible
                                 for one of the exemptions noted below if such
                                 acquisition:

                                 (a) (i) is made solely with the assets of a
                                 bank collective investment fund and (ii)
                                 satisfies the requirements and conditions of
                                 Prohibited Transaction Class Exemption
                                 ("PTCE") 91-38 issued by the Department of
                                 Labor ("DOL");

                                 (b) (i) is made solely with assets of an
                                 insurance company pooled separate account and
                                 (ii) satisfies the requirements and
                                 conditions of PTCE 90-1 issued by the DOL;

                                 (c) (i) is made solely with assets managed by
                                 a qualified professional asset manager and
                                 (ii) satisfies the requirements and
                                 conditions of PTCE 84-14 issued by the DOL;

                                 (d) is made solely with assets of a
                                 governmental plan (as defined in Section
                                 3(32) of ERISA) which is not subject to the
                                 provisions of Section 401 of the Code;

                                 (e) (i) is made solely with assets of an
                                 insurance company general account and (ii)
                                 satisfies the requirements and conditions of
                                 PTCE 95-60 issued by the DOL; or

                                 (f) (i) is made solely with assets managed by
                                 an in-house asset manager and (ii) satisfies
                                 the requirements and conditions of PTCE 96-23
                                 issued by the DOL.

                                 Under ERISA, assets of a pension or other
                                 employee benefit plan may include assets held
                                 in the general account of an insurance
                                 company which has issued an insurance policy
                                 to such plan or assets of an entity in which
                                 the plan has invested.  In addition to
                                 considering the consequences of holding the
                                 Notes, employee benefit plans subject to
                                 ERISA (or insurance companies deemed to be
                                 investing ERISA plan assets) purchasing the
                                 Notes should consider the possible
                                 implications of owning the Wells Fargo Stock.
                                 Thus, any insurance company, pension or
                                 employee benefit plan or entity holding
                                 assets of such a plan proposing to invest in
                                 the Notes should consult with its legal
                                 counsel prior to such investment.

United States Federal Taxation   The Notes are Optionally Exchangeable Notes
                                 and investors should refer to the discussion
                                 under "United States Federal Taxation--Notes--
                                 Optionally Exchangeable Notes" in the
                                 accompanying prospectus supplement. In
                                 connection with the discussion thereunder, we
                                 have determined that the "comparable


                                     PS-19

<PAGE>



                                 yield" is an annual rate of 6.81%, compounded
                                 semi-annually. Based on our determination of
                                 the comparable yield, the "projected payment
                                 schedule" for a Note (assuming a par amount of
                                 $1,000 or with respect to each integral
                                 multiple thereof) consists of the semi-annual
                                 coupons and an additional projected amount due
                                 at maturity, equal to $1,422.39.

                                 The comparable yield and the projected
                                 payment schedule are not provided for any
                                 purpose other than the determination of
                                 United States Holders' interest accruals and
                                 adjustments in respect of the Notes, and we
                                 make no representation regarding the actual
                                 amounts of the payments on a Note.



                                     PS-20

<PAGE>



                                                                         ANNEX A


                          OFFICIAL NOTICE OF EXCHANGE

                                           Dated: [On or after October 1, 1999]

Morgan Stanley Dean Witter & Co.
1585 Broadway
New York, New York 10036

Morgan Stanley & Co. Incorporated, as
  Calculation Agent
1585 Broadway
New York, New York 10036
Fax No.: (212) 761-0674
(Attn: Lily Lam)

Dear Sirs:

     The undersigned holder of the Medium Term Notes, Series C, Senior Fixed
Rate Notes, 2% Exchangeable Notes due July 7, 2006 (Exchangeable for Shares of
Common Stock of Wells Fargo & Company) of Morgan Stanley Dean Witter & Co.
(CUSIP No. 617446DL0) (the "Notes") hereby irrevocably elects to exercise with
respect to the principal amount of the Notes indicated below, as of the date
hereof (or, if this letter is received after 11:00 a.m. on any Trading Day, as
of the next Trading Day), provided that such day is prior to the earliest of
(i) July 7, 2006, (ii) the Call Date and (iii) in the event of a call for cash,
the Company Notice Date, the Exchange Right as described in Pricing Supplement
No. 17 dated July 1, 1999 (the "Pricing Supplement") to the Prospectus
Supplement dated May 6, 1999 and the Prospectus dated May 5, 1999 related to
Registration Statement No. 333-75289. Terms not defined herein have the
meanings given to such terms in the Pricing Supplement. Please date and
acknowledge receipt of this notice in the place provided below on the date of
receipt, and fax a copy to the fax number indicated, whereupon the Company will
deliver, at its sole option, shares of the common stock of Wells Fargo &
Company or cash 3 business days after the Exchange Date in accordance with the
terms of the Notes, as described in the Pricing Supplement.

                                   Very truly yours,


                                   --------------------------------------------
                                   [Name of Holder]

                                   By:
                                      ------------------------------------------
                                      [Title]


                                   ---------------------------------------------
                                   [Fax No.]

                                   $
                                    --------------------------------------------
                                   Principal Amount of Notes surrendered for
                                   exchange


Receipt of the above Official
Notice of Exchange is hereby acknowledged

MORGAN STANLEY DEAN WITTER & CO., as Issuer

MORGAN STANLEY & CO. INCORPORATED, as Calculation Agent

By MORGAN STANLEY & CO. INCORPORATED, as Calculation Agent

By:
   -------------------------------------------------
   Title:

Date and time of acknowledgment
                               ---------------------



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