MORGAN STANLEY DEAN WITTER DISCOVER & CO
424B3, 1997-07-23
FINANCE SERVICES
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         Subject to Completion, Pricing Supplement dated July 16, 1997

PROSPECTUS Dated June 2, 1997                      Pricing Supplement No. 9 to
PROSPECTUS SUPPLEMENT                     Registration Statement No. 333-27919
Dated June 2, 1997                                              July    , 1997
                                                                Rule 424(b)(3)
                                  $50,000,000
                  Morgan Stanley, Dean Witter, Discover & Co.
                          MEDIUM-TERM NOTES, SERIES C
                            Senior Fixed Rate Notes


                     EXCHANGEABLE NOTES DUE JULY    , 2002


              Exchangeable For an Amount Payable in U.S. Dollars
                           based on the level of the
                      S&P 500 COMPOSITE STOCK PRICE INDEX

               The Exchangeable Notes due July   , 2002 (the "Notes"), are
Medium-Term Notes, Series C (Senior Fixed Rate Notes) of Morgan Stanley, Dean
Witter, Discover & Co. (the "Company"), as further described below and in the
Prospectus Supplement under "Description of Notes--Fixed Rate Notes"
and "--Exchangeable Notes."  The issue price of each Note will be
$          (    % of the principal amount at maturity) (the "Issue Price").
The Issue Price represents a yield to maturity of      % per annum
computed on a semi-annual bond-equivalent basis based on the Issue Price
calculated from the date of issuance (the "Original Issue Date").  The Notes
are issued in minimum denominations of $1,000 per Note and will mature on July
   , 2002.  There will be no periodic payments of interest on the Notes.

               On any Exchange Date, the holder of a Note will have the right
(the "Exchange Right"), subject to a prior call of the Notes by the Company
(as described in the immediately succeeding paragraph) and upon completion by
the holder and delivery to the Company and the Calculation Agent of an
Official Notice of Exchange prior to 11:00 a.m. New York City time on such
date, to exchange each $1,000 principal amount of such Note for an amount in
dollars ("Parity") equal to          (the "Exchange Ratio") multiplied by the
Index Value of the S&P 500 Composite Stock Price Index (the "S&P 500 Index")
on the Exchange Date.  Upon any exchange, the holder will not receive any cash
payment representing any accrued original issue discount ("Stated OID").  Such
accrued Stated OID will be deemed paid by the cash received by the holder upon
exercise of the Exchange Right.  An Exchange Date will be any Trading Day that
falls during the period beginning 90 days after the Original Issue Date and
ending on the earliest of (i) the seventh scheduled Trading Day prior to the
Maturity Date and (ii) in the event of a call of the Notes by the Company, the
Company Notice Date.

               On or after June 15, 1999, the Company may call the Notes, in
whole but not in part, for mandatory exchange into cash in an amount equal to
Parity on the Trading Day immediately prior to the Company Notice Date;
provided that, if such amount is less than the applicable Call Price for the
Call Date announced on such Company Notice Date, the Company will pay such
applicable Call Price.  If the Notes are so called for mandatory exchange, the
cash to be delivered to holders of Notes will be delivered on the date (the
"Call Date") not less than 30 nor more than 60 days after the Company Notice
Date, as specified by the Company in its notice of mandatory exchange.
Following a mandatory exchange by the Company, the holder of a Note will not
be entitled to (i) receive any cash payment representing accrued Stated OID
(such accrued Stated OID will be deemed paid by the delivery of Parity or the
Call Price, as applicable) or (ii) exercise the Exchange Right.

               The closing value of the S&P 500 Index on the date of this
Pricing Supplement was         (the "Initial Index Value").  See "Historical
Information" in this Pricing Supplement for information on the range of values
for the S&P 500 Index.

               The Company will cause Parity and any adjustments to the Index
Value to be determined by the Calculation Agent for The Chase Manhattan Bank
(formerly known as Chemical Bank) as Trustee under the Senior Debt Indenture.

               An investment in the Notes entails risks not associated with
similar investments in a conventional debt security, as described under " Risk
Factors" on PS-4 through PS-6 herein.


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

                                 PRICE   %

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

             Price to Public    Agent's Commissions(1)    Proceeds to Company
             ---------------    ----------------------    -------------------

Per Note.               %                         %                       %
Total....    $                     $                      $



- ------------
(1) The Company has agreed to indemnify the Agent against certain liabilities,
    including liabilities under the Securities Act  of 1933.

                          MORGAN STANLEY DEAN WITTER


Information contained in this preliminary pricing supplement is subject to
completion or amendment.  These securities may not be delivered prior to the
time a final pricing supplement is delivered.  This pricing supplement and the
accompanying prospectus and prospectus supplement shall not constitute an
offer to sell or the solicitation of an offer to buy nor shall there be any
sale of these securities in any State in which such offer, solicitation or
sale would be unlawful prior to registration or qualification under the
securities laws of any such State.


CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS THAT
STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE NOTES OR THE
INDIVIDUAL STOCKS UNDERLYING THE S&P 500.  SPECIFICALLY, THE AGENT MAY
OVERALLOT IN CONNECTION WITH THE OFFERING, AND MAY BID FOR AND PURCHASE THE
NOTES OR INDIVIDUAL STOCKS UNDERLYING THE S&P 500 IN THE OPEN MARKET.  FOR A
DESCRIPTION OF THESE ACTIVITIES, SEE "USE OF PROCEEDS AND HEDGING."

Capitalized terms not defined herein have the meanings given to such terms in
the accompanying Prospectus Supplement.

Principal Amount..............   $50,000,000

Maturity Date.................   July    , 2002

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

Issue Price...................   $          (      % of the principal amount
                                 at maturity)

Original Issue Date
(Settlement Date).............             , 1997

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

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

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

Agent.........................   Morgan Stanley & Co. Incorporated

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

Exchange Right................   On any Exchange Date, subject to a prior call
                                 of the Notes by the Company as described
                                 under "Company Exchange Right" below, the
                                 holders of Notes will be entitled upon (i)
                                 completion by the holder and delivery to the
                                 Company 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 such Notes to the
                                 Trustee, to exchange each $1,000 principal
                                 amount of Notes for Parity on such Exchange
                                 Date.  Payment by the Company will be made 3
                                 Business Days after the Exchange Date,
                                 subject to delivery of such Notes to the
                                 Trustee on the Exchange Date.  The Exchange
                                 Date is subject to adjustment as more fully
                                 described under "Exchange Date" below.

                                 The Company shall, or shall cause the
                                 Calculation Agent to, deliver such payment to
                                 the Trustee for delivery to the holders.

Parity........................   With respect to any Trading Day, an amount in
                                 dollars equal to the Exchange Ratio times the
                                 Index Value of the S&P 500 Index on such
                                 Trading Day.

Exchange Ratio................

Exchange Date.................   Any Trading Day that falls during the period
                                 beginning 90 days after the Original Issue
                                 Date and ending on the earliest of (i) the
                                 seventh scheduled Trading Day prior to the
                                 Maturity Date or (ii) the Company Notice Date.

                                 If a Market Disruption Event occurs on any
                                 such Trading Day, the Exchange Date will be
                                 deemed to be the immediately succeeding
                                 Trading Day during which no Market Disruption
                                 Event shall have occurred; provided that if a
                                 Market Disruption Event has occurred on each
                                 of the five immediately succeeding Trading
                                 Days, then the relevant Exchange Date will be
                                 deemed to be such fifth succeeding Trading
                                 Day, notwithstanding the occurrence of a
                                 Market Disruption Event on such day (an
                                 "Extended Exchange Date").  With respect to
                                 any such Extended Exchange Date on which a
                                 Market Disruption Event occurs, the
                                 Calculation Agent will determine the value of
                                 the S&P 500 Index on such Extended Exchange
                                 Date in accordance with the formula for and
                                 method of calculating the S&P 500 Index last
                                 in effect prior to the commencement of the
                                 Market Disruption Event, using the closing
                                 price (or, if trading in the relevant
                                 securities has been materially suspended or
                                 materially limited, its good faith estimate
                                 of the closing price that would have
                                 prevailed but for such suspension or
                                 limitation) on such Trading Day of each
                                 security most recently comprising the S&P.

Company Exchange Right .......   On or after June 15, 1999, the Company may
                                 call the Notes, in whole but not in part, for
                                 mandatory exchange into cash in an amount
                                 equal to Parity on the Trading Day (on which
                                 no Market Disruption Event may have occurred)
                                 immediately preceding the Company Notice
                                 Date; provided that, if such amount as
                                 determined by the Calculation Agent, is less
                                 than the applicable Call Price for the Call
                                 Date announced on such Company Notice Date,
                                 the Company will pay such applicable Call
                                 Price.  If the Notes are so called for
                                 mandatory exchange by the Company, then, the
                                 cash to be delivered to holders of Notes will
                                 be delivered on the Call Date fixed by the
                                 Company and set forth in its notice of
                                 mandatory exchange, upon delivery of such
                                 Notes to the Trustee.  Following an exchange
                                 by the Company, the holder will not be
                                 entitled to (i) receive any additional cash
                                 payment representing any accrued Stated OID
                                 (such accrued Stated OID will be deemed paid
                                 by the delivery of Parity or the Call Price,
                                 as applicable) or (ii) exercise the Exchange
                                 Right.

                                 The Company shall, or shall cause the
                                 Calculation Agent to, deliver such cash to
                                 the Trustee for delivery to the holders.

Call Date.....................   The date, not less than 30 nor more than 60
                                 days after the Company Notice Date, as
                                 specified by the Company in its notice of
                                 mandatory exchange.

Company Notice Date...........   Any Trading Day on which the Company issues
                                 its notice of mandatory exchange, which must
                                 be 30 to 60 days prior to any Trading Day on
                                 or after June 15, 1999.

Call Price....................   The table below shows indicative Call Prices
                                 for each $1,000 principal amount of Notes on
                                 June 15, 1999 and at each June 15 thereafter
                                 to and including the Maturity Date. The Call
                                 Price for each $1,000 principal amount of
                                 Notes called for mandatory exchange on Call
                                 Dates between such indicative dates would
                                 include an additional amount reflecting any
                                 additional Stated OID from the next preceding
                                 date in the table through the applicable Call
                                 Date at a rate of    % per annum. Such
                                 additional accreted amount of Stated OID, as
                                 determined by the Calculation Agent, will be
                                 calculated on a semiannual bond-equivalent
                                 basis based on the Call Price for the
                                 immediately preceding Call Date indicated in
                                 the table below.

                     Call Date                                Call Price
                     ---------                                ----------

                     June 15, 1999..........................  $
                     June 15, 2000..........................  $
                     June 15, 2001..........................  $
                     June 15, 2002..........................  $
                     Maturity...............................  $


Index Value...................   The Index Value, on any Trading Day, will
                                 equal the closing value of the S&P 500 Index
                                 or any Successor Index at the regular official
                                 weekday close of trading on such Trading Day.
                                 See "Discontinuance of the S&P 500 Index;
                                 Alteration of Method of Calculation."

                                 References herein to the S&P 500 Index will
                                 be deemed to include any Successor Index,
                                 unless the context requires otherwise.

Trading Day...................   A day on which trading is generally conducted
                                 (i) on the New York Stock Exchange ("NYSE"),
                                 the American Stock Exchange, Inc. ("AMEX")
                                 and the NASDAQ National Market ("NASDAQ NMS"),
                                 (ii) on the Chicago Mercantile Exchange and
                                 (iii) on the Chicago Board of Options
                                 Exchange, as determined by the Calculation
                                 Agent.

Calculation Agent.............   Morgan Stanley & Co. Incorporated ("MS & Co.")

                                 Because the Calculation Agent is an affiliate
                                 of the Company, potential conflicts of
                                 interest may exist between the Calculation
                                 Agent and the holders of the Notes, including
                                 with respect to certain determinations and
                                 judgments that the Calculation Agent must make
                                 in determining the Index Value or whether a
                                 Market Disruption Event has occurred.  See
                                 "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.

Risk Factors..................   An investment in the Notes entails
                                 significant risks not associated with similar
                                 investments in a conventional debt security,
                                 including the following:

                                 The yield to maturity is less than would be
                                 payable on a non-exchangeable debt security
                                 if the Company were to issue such a security
                                 at the same time it issues the Notes.

                                 There can be no assurance as to how the Notes
                                 will trade in the secondary market or whether
                                 such market will be liquid or illiquid.  The
                                 market value for the Notes will be affected
                                 by a number of factors independent of the
                                 creditworthiness of the Company, including,
                                 but not limited to, the volatility of the S&P
                                 500 Index, the dividend rates on the stocks
                                 underlying the S&P 500 Index, market interest
                                 and yield rates and the time remaining to the
                                 first Exchange Date, any Call Date or the
                                 maturity of the Notes.  In addition, the
                                 value of the S&P 500 Index depends on a
                                 number of interrelated factors, including
                                 economic, financial and political events, over
                                 which the Company has no control.  The market
                                 value of the Notes is expected to depend
                                 primarily on the extent of the appreciation,
                                 if any, of the Index Value of the S&P 500
                                 Index above the Initial Index Value.  The
                                 price at which a holder will be able to sell
                                 Notes prior to maturity may be at a discount,
                                 which could be substantial, from the accreted
                                 principal amount thereof, if, at such time,
                                 the Index Value of the S&P 500 Index is
                                 below, equal to or not sufficiently above the
                                 Initial Index Value.

                                 The historical S&P 500 Index values should
                                 not be taken as an indication of the future
                                 performance of the S&P 500 Index during the
                                 term of the Notes.  While the trading prices
                                 of the stocks underlying the S&P 500 Index
                                 will determine the value of the S&P 500
                                 Index, it is impossible to predict whether
                                 the value of the S&P 500 Index will rise or
                                 fall.  Trading prices of the stocks underlying
                                 the S&P 500 Index will be influenced by both
                                 the complex and interrelated political,
                                 economic, financial and other factors that can
                                 affect the capital markets generally and the
                                 equity trading markets on which the
                                 underlying stocks are traded, and by various
                                 circumstances that can influence the values
                                 of the underlying stocks in a specific market
                                 segment or a particular underlying stock.

                                 The policies of S&P concerning additions,
                                 deletions and substitutions of the stocks
                                 underlying the S&P 500 Index and the manner
                                 in which S&P takes account of certain changes
                                 affecting such underlying stocks may affect
                                 the value of the S&P 500 Index.  The policies
                                 of S&P with respect to the calculation of the
                                 S&P 500 Index could also affect the value of
                                 the S&P 500 Index.  S&P may discontinue or
                                 suspend calculation or dissemination of the
                                 S&P 500 Index.  Any such actions could affect
                                 the value of the Notes.  See "S&P 500 Index"
                                 and "Discontinuance of the S&P 500 Index;
                                 Alteration of Method of Calculation" below.

                                 Because the Calculation Agent is an affiliate
                                 of the Company, potential conflicts of
                                 interest may exist between the Calculation
                                 Agent and the holders of the Notes, including
                                 with respect to certain determinations and
                                 judgments that the Calculation Agent must make
                                 in determining the Index Value or whether a
                                 Market Disruption Event has occurred.  See
                                 "Market Disruption Event" below.

                                 It is suggested that prospective investors
                                 who consider purchasing the Notes should
                                 reach an investment decision only after
                                 carefully considering the suitability of the
                                 Notes in light of their particular
                                 circumstances.

                                 Investors should also consider the tax
                                 consequences of investing in the Notes.  See
                                 "United States Federal Taxation" below.

Market Disruption Event.......   "Market Disruption Event" means, with respect
                                 to the S&P 500 Index:

                                    (i) a suspension, absence or material
                                    limitation of trading of 100 or more of
                                    the securities included in the S&P 500
                                    Index on the primary market for such
                                    securities for more than two hours of
                                    trading or during the one-half hour period
                                    preceding the close of trading in such
                                    market; or the suspension, absence or
                                    material limitation of trading on the
                                    primary market for trading in futures or
                                    options contracts related to the S&P 500
                                    Index during the one-half hour period
                                    preceding the close of trading in the
                                    applicable market, in each case as
                                    determined by the Calculation Agent in its
                                    sole discretion; and

                                    (ii) a determination by the Calculation
                                    Agent in its sole discretion that the
                                    event described in clause (i) above
                                    materially interfered with the ability of
                                    the Company 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 or market, (2)
                                 a decision to permanently discontinue trading
                                 in the relevant futures or options contract
                                 will not constitute a Market Disruption
                                 Event, (3) limitations pursuant to New York
                                 Stock Exchange 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 will
                                 constitute a Market Disruption Event, (4) a
                                 suspension of trading in a futures or options
                                 contract on the S&P 500 Index by the primary
                                 securities market related to such contract by
                                 reason of (a) a price change exceeding limits
                                 set by such exchange or market, (b) an
                                 imbalance of orders relating to such
                                 contracts or (c) a disparity in bid and ask
                                 quotes relating to such contracts will
                                 constitute a suspension or material
                                 limitation of trading in futures or options
                                 contracts related to the S&P 500 Index and (5)
                                 a "suspension, absence or material limitation
                                 of trading" on the primary market on which
                                 futures or options contracts related to the
                                 S&P 500 Index are traded will not include any
                                 time when such 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
                                 Issue Price of a Note plus the accrued Stated
                                 OID 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 the Issuer in accordance with the
                                 Exchange Right or (y) the Issuer has called
                                 the Notes  in accordance with the Company
                                 Exchange 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 (I) Parity
                                 determined by the Calculation Agent as of the
                                 Exchange Date or the Trading Day prior to the
                                 Company Notice Date, as applicable, or (II)
                                 in the event of a call by the Company for an
                                 amount equal to the Call Price, such Call
                                 Price, and will not include any accrued
                                 Stated OID.  See "Call Price" above.

S&P 500 Index.................   The S&P 500 Index is published by S&P and is
                                 intended to provide a performance benchmark
                                 for the U.S. equity markets.  The calculation
                                 of the value of the S&P 500 Index (discussed
                                 below in further detail) is based on the
                                 relative value of the aggregate Market Value
                                 (as defined below) of the common stocks of
                                 500 companies (the "Component Stocks") as of
                                 a particular time as compared to the
                                 aggregate average Market Value of the common
                                 stocks of 500 similar companies during the
                                 base period of the years 1941 through 1943.
                                 The "Market Value" of any Component Stock is
                                 the product of the market price per share and
                                 the number of the then outstanding shares of
                                 such Component Stock.  The 500 companies are
                                 not the 500 largest companies listed on the
                                 NYSE and not all 500 companies are listed on
                                 such exchange.  S&P chooses companies for
                                 inclusion in the S&P 500 Index with an aim of
                                 achieving a distribution by broad industry
                                 groupings that approximates the distribution
                                 of these groupings in the common stock
                                 population of the U.S. equity market.  S&P
                                 may from time to time, in its sole
                                 discretion, add companies to, or delete
                                 companies from, the S&P 500 Index to achieve
                                 the objectives stated above.  Relevant
                                 criteria employed by S&P include the
                                 viability of the particular company, the
                                 extent to which that company represents the
                                 industry group to which it is assigned, the
                                 extent to which the company's common stock is
                                 widely-held and the Market Value and trading
                                 activity of the common stock of that company.

                                 The S&P 500 Index is calculated using a
                                 base-weighted aggregate methodology: the
                                 level of the Index reflects the total Market
                                 Value of all 500 Component Stocks relative to
                                 the S&P 500 Index's base period of 1941-43
                                 (the "Base Period").

                                 An indexed number is used to represent the
                                 results of this calculation in order to make
                                 the value easier to work with and track over
                                 time.

                                 The actual total Market Value of the
                                 Component Stocks during the Base Period has
                                 been set equal to an indexed value of 10.
                                 This is often indicated by the notation
                                 1941-43=10.  In practice, the daily
                                 calculation of the S&P 500 Index is computed
                                 by dividing the total Market Value of the
                                 Component Stocks by a number called the Index
                                 Divisor.  By itself, the Index Divisor is an
                                 arbitrary number.  However, in the context of
                                 the calculation of the S&P 500 Index, it is
                                 the only link to the original base period
                                 value of the Index.  The Index Divisor keeps
                                 the Index comparable over time and is the
                                 manipulation point for all adjustments to the
                                 S&P 500 Index ("Index Maintenance").

                                 Index maintenance includes monitoring and
                                 completing the adjustments for company
                                 additions and deletions, share changes, stock
                                 splits, stock dividends, and stock price
                                 adjustments due to company restructurings or
                                 spinoffs.

                                 To prevent the value of the Index from
                                 changing due to corporate actions, all
                                 corporate actions which affect the total
                                 Market Value of the Index require an Index
                                 Divisor adjustment.  By adjusting the Index
                                 Divisor for the change in total Market Value,
                                 the value of the S&P 500 Index remains
                                 constant.  This helps maintain the value of
                                 the Index as an accurate barometer of stock
                                 market performance and ensures that the
                                 movement of the Index does not reflect the
                                 corporate actions of individual companies in
                                 the Index.  All Index Divisor adjustments are
                                 made after the close of trading and after the
                                 calculation of the closing value of the S&P
                                 500 Index.  Some corporate actions, such as
                                 stock splits and stock dividends, require
                                 simple changes in the common shares
                                 outstanding and the stock prices of the
                                 companies in the Index and do not require
                                 Index Divisor adjustments.

                                 The table below summarizes the types of S&P
                                 500 Index maintenance adjustments and
                                 indicates whether or not an Index Divisor
                                 adjustment is required.


                                                              Divisor
        Type of                                              Adjustment
    Corporate Action           Adjustment Factor              Required
    ----------------           -----------------             ----------

Stock split                 Shares Outstanding                   No
     (i.e. 2x1)             multiplied by 2;
                            Stock Price divided by 2

Share issuance              Shares Outstanding plus             Yes
     (i.e. Change > 5%)     newly issued Shares

Share repurchase            Shares Outstanding minus            Yes
     (i.e. Change > 5%)     Repurchased Shares

Special cash                Share Price minus Special           Yes
  dividends                 Dividend

Company change              Add new company Market              Yes
                            Value minus old company
                            Market Value

Rights offering             Price of parent company             Yes
                            minus

                            ( Price of Rights )
                            (-----------------)
                            (   Right Ratio   )


Spinoffs                    Price of parent company             Yes
                            minus

                            ( Price of Spinoff Co. )
                            (----------------------)
                            ( Share Exchange Ratio )

                                 Stock splits and stock dividends do not
                                 affect the Index Divisor of the S&P 500
                                 Index, because following a split or dividend
                                 both the stock price and number of shares
                                 outstanding are adjusted by S&P so that there
                                 is no change in the Market Value of the
                                 Component Stock.  All stock split and
                                 dividend adjustments are made after the close
                                 of trading on the day before the ex-date.

                                 Each of the corporate events exemplified in
                                 the table requiring an adjustment to the
                                 Index Divisor has the effect of altering the
                                 Market Value of the Component Stock and
                                 consequently of altering the aggregate Market
                                 Value of the Component Stocks (the "Post-Event
                                 Aggregate Market Value").  In order that the
                                 level of the Index (the "Pre-Event Index
                                 Value") not be affected by the altered Market
                                 Value (whether increase or decrease) of the
                                 affected Component Stock, a new Index Divisor
                                 ("New Divisor") is derived as follows:


                    Post-Event Aggregate Market Value
                    --------------------------------- = Pre-Event Index Value
                               New Divisor


                                  Post-Event Aggregate Market Value
                    New Divisor = ---------------------------------
                                        Pre-Event Index Value


                                 A large part of the S&P 500 Index maintenance
                                 process involves tracking the changes in the
                                 number of shares outstanding of each of the
                                 S&P 500 Index companies.  Four times a year,
                                 on a Friday close to the end of each calendar
                                 quarter, the share totals of companies in the
                                 Index are updated as required by any changes
                                 in the number of shares outstanding.  After
                                 the totals are updated, the Index Divisor is
                                 adjusted to compensate for the net change in
                                 the total Market Value of the Index.  In
                                 addition, any changes over 5% in the current
                                 common shares outstanding for the S&P 500
                                 Index companies are carefully reviewed on a
                                 weekly basis, and when appropriate, an
                                 immediate adjustment is made to the Index
                                 Divisor.

Discontinuance of the S&P
500 Index;
Alteration of Method
of Calculation................   If S&P discontinues publication of the S&P
                                 500 Index and S&P or another entity publishes
                                 a successor or substitute index that the
                                 Calculation Agent determines, in its sole
                                 discretion, to be comparable to the
                                 discontinued S&P 500 Index (such index being
                                 referred to herein as a "Successor Index"),
                                 then the Index Value will be determined by
                                 reference to the value of such Successor
                                 Index at the close of trading on the NYSE,
                                 the AMEX, NASDAQ NMS or the relevant exchange
                                 or market for the Successor Index on any
                                 subsequent Trading Day on which the Index
                                 Value must be determined.

                                 Upon any selection by the Calculation Agent
                                 of a Successor Index, the Calculation Agent
                                 will cause written notice thereof to be
                                 furnished to the Trustee, to the Company and
                                 to the holders of the Notes within three
                                 Trading Days of such selection.

                                 If S&P discontinues publication of the S&P
                                 500 Index prior to, and such discontinuance
                                 is continuing on, any subsequent Trading Day
                                 on which the Index Value must be determined
                                 and the Calculation Agent determines that no
                                 Successor Index is available at such time,
                                 then on such Trading Day, the Calculation
                                 Agent will determine the Index Value on such
                                 Trading Day.  The Index Value will be
                                 computed by the Calculation Agent in
                                 accordance with the formula for and method of
                                 calculating the S&P 500 Index last in effect
                                 prior to such discontinuance, using the
                                 closing price (or, if trading in the relevant
                                 securities has been materially suspended or
                                 materially limited, its good faith estimate
                                 of the closing price that would have
                                 prevailed but for such suspension or
                                 limitation) on such Trading Day of each
                                 security most recently comprising the S&P 500
                                 Index. Notwithstanding these alternative
                                 arrangements, discontinuance of the
                                 publication of the S&P 500 Index may
                                 adversely affect the value of the Notes.

                                 If at any time the method of calculating the
                                 S&P 500 Index or a Successor Index, or the
                                 value thereof, is changed in a material
                                 respect, or if the S&P 500 Index or a
                                 Successor Index is in any other way modified
                                 so that such index does not, in the opinion
                                 of the Calculation Agent, fairly represent
                                 the value of the S&P 500 Index or such
                                 Successor Index had such changes or
                                 modifications not been made, then, from and
                                 after such time, the Calculation Agent will,
                                 at the close of business in New York City on
                                 each subsequent Trading Day on which the
                                 Index Value must be determined, make such
                                 calculations and adjustments as, in the good
                                 faith judgment of the Calculation Agent, may
                                 be necessary in order to arrive at a value of
                                 a stock index comparable to the S&P 500 Index
                                 or such Successor Index, as the case may be,
                                 as if such changes or modifications had not
                                 been made, and calculate the Index Value with
                                 reference to the S&P 500 Index or such
                                 Successor Index, as adjusted.  Accordingly,
                                 if the method of calculating the S&P 500
                                 Index or a Successor Index is modified so
                                 that the value of such index is a fraction of
                                 what it would have been if it had not been
                                 modified (e.g., due to a split in the index),
                                 then the Calculation Agent will adjust such
                                 index in order to arrive at a value of the
                                 S&P 500 Index or such Successor Index as if
                                 it had not been modified (e.g., as if such
                                 split had not occurred).

Public Information............   All disclosure contained in this Pricing
                                 Supplement regarding the S&P 500 Index,
                                 including, without limitation, its make-up,
                                 method of calculation and changes in its
                                 components, are derived from publicly
                                 available information prepared by S&P.
                                 Neither the Company nor the Agent take any
                                 responsibility for the accuracy or
                                 completeness of such information.

Historical Information........   The following table sets forth the high and
                                 low daily closing values, as well as
                                 end-of-quarter closing values, of the S&P 500
                                 Index for each quarter in the period from
                                 January 1, 1992 through July 15, 1997.  The
                                 Index Values listed below were obtained from
                                 Bloomberg Financial Markets.  The Company
                                 believes all such information to be accurate.
                                 The historical values of the S&P 500 Index
                                 should not be taken as an indication of
                                 future performance, and no assurance can be
                                 given that the S&P 500 Index  will increase
                                 sufficiently to cause the holders of the
                                 Notes to receive an amount in excess of the
                                 Issue Price on any Exchange Date.


                                           Daily Index Values
                                 --------------------------------------
                                                                 Period
                                  High             Low             End
                                 ------           ------         ------
1992
       First Quarter.......      420.77           403.00         403.69
       Second Quarter......      418.49           394.50         408.14
       Third Quarter.......      425.27           409.16         417.80
       Fourth Quarter......      441.28           402.66         435.71
1993
       First Quarter.......      456.34           429.05         451.67
       Second Quarter......      453.85           433.54         450.53
       Third Quarter.......      463.56           441.43         458.93
       Fourth Quarter......      470.94           457.48         466.45
1994
       First Quarter.......      482.00           445.55         445.76
       Second Quarter......      462.37           438.92         444.27
       Third Quarter.......      476.07           446.13         462.71
       Fourth Quarter......      473.77           445.45         459.27
1995
       First Quarter.......      503.90           459.11         500.71
       Second Quarter......      551.07           501.85         544.75
       Third Quarter.......      586.77           547.09         584.41
       Fourth Quarter......      621.69           576.72         615.93
1996
       First Quarter.......      661.45           598.48         645.50
       Second Quarter......      678.51           631.18         670.63
       Third Quarter.......      687.31           626.65         687.31
       Fourth Quarter......      757.03           689.08         740.74
1997
       First Quarter.......      816.29           737.01         757.12
       Second Quarter......      898.70           737.65         885.14
       Third Quarter
       (through July 15,
       1997)...............      925.76           891.03         925.76


Use of Proceeds and Hedging...   The net proceeds to be received by the
                                 Company from the sale of the Notes will be
                                 used for general corporate purposes and, in
                                 part, by the Company or one or more of its
                                 affiliates in connection with hedging the
                                 Company's obligations under the Notes.

                                 On or prior to the date of this Pricing
                                 Supplement, the Company, through its
                                 subsidiaries and others, may hedge some or
                                 all of its anticipated exposure in connection
                                 with the Notes by the purchase and sale of
                                 exchange traded and over the counter options
                                 on the S&P 500 Index, individual stocks
                                 included in the S&P 500 Index, futures
                                 contracts on the S&P 500 Index and options on
                                 such futures contracts or by taking positions
                                 in any other instruments that it may wish to
                                 use in connection with such hedging.  The
                                 Company, through its subsidiaries, is likely
                                 to modify its hedge position throughout the
                                 life of the Notes by purchasing and selling
                                 the securities and instruments listed above
                                 and other available securities and
                                 instruments.  Although the Company has no
                                 reason to believe that its hedging activity
                                 will have a material impact on the price of
                                 such options, stocks, futures contracts, and
                                 options on futures contracts or on the value
                                 of the S&P 500 Index, there can be no
                                 assurance that the Company will not affect
                                 such prices as a result of its hedging
                                 activities. See also "Use of Proceeds" in the
                                 accompanying Prospectus.

License Agreement.............   S&P and MS & Co. have entered into a
                                 non-exclusive license agreement providing for
                                 the license to MS & Co., and any of its
                                 affiliated or subsidiary companies, in
                                 exchange for a fee, of the right to use the
                                 S&P 500 Index, which is owned and published
                                 by S&P, in connection with certain
                                 securities, including the Notes.

                                 The license agreement between S&P and MS &
                                 Co. provides that the following language must
                                 be set forth in this Pricing Supplement:

                                 The Notes are not sponsored, endorsed, sold
                                 or promoted by S&P.  S&P makes no
                                 representation or warranty, express or
                                 implied, to the holders of the Notes or any
                                 member of the public regarding the
                                 advisability of investing in securities
                                 generally or in the Notes particularly or the
                                 ability of the S&P 500 Index to track general
                                 stock market performance.  S&P's only
                                 relationship to the Company is the licensing
                                 of certain trademarks and trade names of S&P
                                 and of the S&P 500 Index, which is
                                 determined, composed and calculated by S&P
                                 without regard to the Company or the Notes.
                                 S&P has no obligation to take the needs of
                                 the Company or the holders of the Notes into
                                 consideration in determining, composing or
                                 calculating the S&P 500 Index.  S&P is not
                                 responsible for and has not participated in
                                 the determination of the timing of, prices
                                 at, or quantities of the Notes to be issued
                                 or in the determination or calculation of the
                                 equation by which the Notes are to be
                                 converted into cash.  S&P has no obligation
                                 or liability in connection with the
                                 administration, marketing or trading of the
                                 Notes.

                                 S&P DOES NOT GUARANTEE THE ACCURACY AND/OR
                                 THE COMPLETENESS OF THE S&P 500 INDEX OR ANY
                                 DATA INCLUDED THEREIN.  S&P MAKES NO
                                 WARRANTY, EXPRESS OR IMPLIED, AS TO RESULTS TO
                                 BE OBTAINED BY THE COMPANY, HOLDERS OF THE
                                 NOTES, OR ANY OTHER PERSON OR ENTITY FROM THE
                                 USE OF THE S&P INDEX OR ANY DATA INCLUDED
                                 THEREIN IN CONNECTION WITH THE RIGHTS
                                 LICENSED UNDER THE LICENSE AGREEMENT
                                 DESCRIBED HEREIN OR FOR ANY OTHER USE.  S&P
                                 MAKES NO EXPRESS OR IMPLIED WARRANTIES, AND
                                 HEREBY EXPRESSLY DISCLAIMS ALL WARRANTIES OF
                                 MERCHANTABILITY OR FITNESS FOR A PARTICULAR
                                 PURPOSE OR USE WITH RESPECT TO THE S&P 500
                                 INDEX OR ANY DATA INCLUDED THEREIN.  WITHOUT
                                 LIMITING ANY OF THE FOREGOING, IN NO EVENT
                                 SHALL S&P HAVE ANY LIABILITY FOR ANY SPECIAL,
                                 PUNITIVE, INDIRECT OR CONSEQUENTIAL DAMAGES
                                 (INCLUDING LOST PROFITS), EVEN IF NOTIFIED OF
                                 THE POSSIBILITY OF SUCH DAMAGES.

                                 "Standard & Poor's[Registered]",
                                 "S&P[Registered]", "S&P 500[Registered]",
                                 "Standard & Poor's 500," and "500" are
                                 trademarks of McGraw-Hill, Inc. and have been
                                 licensed for use by MS & Co.

United States Federal
Taxation......................   The Notes are Notes Linked to an Index and
                                 investors should refer to the discussion
                                 under "United States Federal
                                 Taxation--Notes--Notes Linked to Commodity
                                 Prices, Single Securities, Basket of
                                 Securities or Indices" and "United States
                                 Federal Taxation--Notes--Optionally
                                 Exchangeable Notes" in the accompanying
                                 Prospectus Supplement.  In connection with the
                                 discussion thereunder, the Company has
                                 determined that the "comparable yield" is an
                                 annual rate of       %, compounded semi-
                                 annually.  Based on the Company's
                                 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 a projected amount due at
                                 maturity, equal to $       (the "Projected
                                 Amount").

                                 THE COMPARABLE YIELD, THE PROJECTED PAYMENT
                                 SCHEDULE AND THE PROJECTED AMOUNT ARE NOT
                                 PROVIDED FOR ANY PURPOSE OTHER THAN THE
                                 DETERMINATION OF UNITED STATES HOLDERS'
                                 INTEREST ACCRUALS AND ADJUSTMENTS IN RESPECT
                                 OF THE NOTES, AND THE COMPANY MAKES NO
                                 REPRESENTATION REGARDING THE ACTUAL AMOUNTS
                                 OF THE PAYMENTS ON A NOTE.


                                                                       ANNEX A
                          OFFICIAL NOTICE OF EXCHANGE

                      Dated:  [At least 90 days after the Original Issue Date]

Morgan Stanley, Dean Witter, Discover & 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 due July   , 2002 (Exchangeable for an Amount Payable
in U.S. Dollars based on the level of the S&P 500 Composite Stock Price Index)
of Morgan Stanley, Dean Witter, Discover & Co.  (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) the seventh scheduled Trading Day
prior to the Maturity Date or (ii) the Company Notice Date), the Exchange
Right as described in Pricing Supplement No. 9 dated July     , 1997 (the
"Pricing Supplement") to the Prospectus Supplement dated June 2, 1997 and the
Prospectus dated June 2, 1997 related to Registration Statement No. 333-27919.
Capitalized 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 payment 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, DISCOVER & 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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