DEAN WITTER SELECT GOVT TR U S TREASURY SER 8
487, 1995-03-14
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<PAGE>



                        File No. 33-57563

               Investment Company Act No. 811-3718

                SECURITIES AND EXCHANGE COMMISSION
                     WASHINGTON, D.C.  20549

                         AMENDMENT NO. 1
                                TO
                             FORM S-6

For Registration Under the Securities Act of 1933 of Securities of
Unit Investment Trusts Registered on Form N-8B-2.

A.   Exact name of Trust:

     DEAN WITTER SELECT GOVERNMENT TRUST,
     U.S. TREASURY SERIES 8

B.   Name of Depositor:

     DEAN WITTER REYNOLDS INC.

C.   Complete address of Depositor's principal executive office:

     DEAN WITTER REYNOLDS INC.
     Two World Trade Center
     New York, New York  10048

D.   Name and complete address of agents for service:

     MR. MICHAEL D. BROWNE
     DEAN WITTER REYNOLDS INC.
     Unit Trust Department
     Two World Trade Center - 59th Floor
     New York, New York  10048

     Copy to:

     KENNETH W. ORCE, ESQ.
     CAHILL GORDON & REINDEL
     80 Pine Street - 19th Floor
     New York, New York  10005


<PAGE>



E.   Total and amount of securities being registered:

     An indefinite number of Units of Beneficial Interest pursuant
     to Rule 24f-2 promulgated under the Investment Company Act of
     1940, as amended.

F.   Proposed maximum offering price to the public of the
     securities being registered:

     Indefinite

G.   Amount of filing fee, computed at twenty-ninth of one percent
     of the proposed maximum aggregate offering price to the
     public:

     $500 (as required by Rule 24f-2)*

H.   Approximate date of proposed sale to public:

     AS SOON AS PRACTICABLE AFTER THE EFFECTIVE DATE OF THE
     REGISTRATION STATEMENT.


    /X/   Check box if it is proposed that this filing will become
     effective immediately upon filing on March 14, 1995 pursuant
     to Rule 487.






_________________________
*    This amount was previously paid with the filing of the
     Preliminary Registration Statement.



<PAGE>


               DEAN WITTER SELECT GOVERNMENT TRUST,
                       U.S. TREASURY SERIES 8


                      Cross-reference Sheet

             Pursuant to Rule 404(c) of Regulation C
                 Under the Securities Act of 1933

           (Form N-8B-2 Items required by Instruction 1
                  as to Prospectus on Form S-6)

Form N-8B-2                        Form S-6
Item Number                        Heading in Prospectus
-----------                        ---------------------

     I.  ORGANIZATION AND GENERAL INFORMATION

1.   (a) Name of Trust                ) Front Cover
     (b) Title of securities issued   ) Front Cover

2.   Name and address of Depositor    ) Table of Contents

3.   Name and address of Trustee      ) Table of Contents

Name and address of principal         ) Table of Contents
     Underwriter                      )

Organization of Trust                 ) Introduction

Execution and termination of          ) Introduction;
     Indenture                        ) Amendment and Termination

Changes of name                       ) Included in Form
                                        N-8B-2

Fiscal year    ) Included in Form
                                      ) N-8B-2

Litigation     ) *

     II.  GENERAL DESCRIPTION OF THE TRUST
          AND SECURITIES OF THE TRUST

General Information regarding         )
     Trust's Securities and Rights    )
     of Holders

     (a)  Type of Securities          ) Rights of Unit Holders
          (Registered or Bearer)      )



______________________

*    Not applicable, answer negative or not required.


<PAGE>


     (b)  Type of Securities          ) Administration of the
          (Cumulative or              ) Trust-Distribution from the
          Distributive)               ) Interest and Principal Accounts

     (c)  Rights of Holders as to     ) Redemption; Public
          withdrawal or redemption    ) Offering of Units-
                                      ) Secondary Market

     (d)  Rights of Holders as to     ) Public Offering of
          conversion, transfer, etc.  ) Units-Secondary
                                      ) Market; Exchange Option
                                      ) Redemption; Rights
                                      ) of Unit Holders

     (e)  Lapses or defaults with     ) *
          respect to periodic payment )
          plan certificates           )

     (f)  Voting rights as to Secu-   ) Rights of Unit Holder
          rities under the Indenture  ) -Certain Limitations;
                                      ) Amendment and Termination
                                      )

     (g)  Notice to Holders as to     )
          change in:                  )

          (1)  assets of Trust        ) Administration of the
                                      ) Trust-Records and
                                      ) Accounts; The Trust-
                                      ) Summary Description
                                      ) of the Portfolio
          (2)  terms and conditions   ) Amendment and Termination
               of Trust's Securities  )
          (3)  provisions of Trust    ) Amendment and Termination
                                      )
          (4)  identity of Depositor  ) Sponsor; Trustee
               and Trustee            )



______________________

*    Not applicable, answer negative or not required.



<PAGE>


     (h)  Security Holders Consent    )
          required to change:         )

          (1)  composition of assets  ) Amendment and Termination
               of Trust               )
          (2)  terms and conditions   ) Amendment and Termination
                                      )
          (3)  provisions of          ) Amendment and Termination
               Indenture              )
          (4)  identity of Depositor  ) *
               and Trustee            )

     (i)  Other provisions            ) Cover of Prospectus;
                                      ) Tax Status of the Trust
                                      )

11.  Type of securities comprising    ) The Trust-Summary
     Units                            ) Description of
                                      ) the Portfolio; -
                                      ) Objectives and
                                      ) Securities Selection;
                                      ) -Special Considerations

12.  Type of securities comprising    ) *
     periodic payment certificates    )


13.  (a)  Load, fees, expenses, etc.  ) Summary of Essential
                                      ) Information; Public
                                      ) Offering of Units-Public
                                      ) Offering Price; -Profit
                                      ) of Sponsor;- Volume
                                      ) Discount; Expenses and
                                      ) Charges

     (b)  Certain information         ) *
          regarding periodic payment  )
          certificates                )

     (c)  Certain percentages         ) Summary of Essential
                                      ) Information;
                                      ) Public Offering of
                                      ) Units-Public
                                      ) Offering Price
                                      )


______________________

*    Not applicable, answer negative or not required.


<PAGE>


     (d)  Price differentials         ) Public Offering of
                                      ) Units - Public
                                      ) Offering Price; - Volume
                                      ) Discount

     (e)  Certain other fees, etc.    ) Rights of Unit Holders
          payable by Holders          )

     (f)  Certain profits receivable  ) Redemption - Right of
          by Depositor, principal     ) Redemption; Profit of
          Underwriters, Trustee or    ) Sponsor
          affiliated persons          )

     (g)  Ratio of annual charges to  ) *
          income                      )

14.  Issuance of Trust's Securities   ) Introduction; Rights of
                                      ) Unit Holders
                                      )

15.  Receipt and handling of          ) Public Offering of Units-
     payments from purchasers         ) Profit of Sponsor

16.  Acquisition and disposition of   ) Introduction; The Trust-
     underlying securities            ) Summary Description of the
                                      ) Portfolio; - Objectives
                                      ) and Securities Selection;
                                      ) Administration of the
                                      ) Trust

17.  Withdrawal or redemption by      ) Redemption;
     Security Holders                 ) Public Offering of Units-
                                      ) Secondary Market; Rights
                                      ) of Unit Holders

18.  (a)  Receipt and disposition of  ) Administration of the
          income                      ) Trust

     (b)  Reinvestment of distribu-   ) Reinvestment Program
          tions                       )

     (c)  Reserves or special fund    ) Administration of the
                                      ) Trust-Distribution from the
                                      ) Interest and Principal
                                      ) Accounts

     (d)  Schedule of distribution    ) *



______________________

*    Not applicable, answer negative or not required.


<PAGE>


19.  Records, accounts and report     ) Administration of the
                                      ) Trust-Records and
                                      ) Accounts;-Reports to
                                      ) Unit Holders

20.  Certain miscellaneous provi-     ) Administration of the
     sions of Indenture               ) Trust; Amendment and
                                      ) Termination; Trustee;
                                      ) Sponsor

21.  Loans to Security Holders        ) *

22.  Limitations on liability         ) Sponsor; Trustee;
                                      ) Evaluator

23.  Bonding arrangements             ) Included in Form N-8B-2

24.  Other material provisions of     ) *
     Indenture                        )

     III. ORGANIZATION, PERSONNEL AND AFFILIATED
          PERSONS OF DEPOSITOR

25.  Organization of Depositor        ) Sponsor

26.  Fees received by Depositor       ) Expenses and Charges -
                                      ) fees; Public Offering of
                                      ) Units-Profit of Sponsor

27.  Business of Depositor            ) Sponsor and Included
                                      ) in Form N-8B-2

28.  Certain information as to        ) Included in Form N-8B-2
     officials and affiliated         )
     persons of Depositor             )

29.  Voting securities of Depositor   ) Included in Form N-8B-2

30.  Persons controlling Depositor    ) *

31.  Payments by Depositor for        ) *
     certain other services           )

32.  Payments by Depositor for        ) *
     certain other services           )
     rendered to Trust                )



______________________

*    Not applicable, answer negative or not required.


<PAGE>


33.  Remuneration of employees of     ) *
     Depositor for certain            )
     services rendered to Trust       )

34.  Remuneration of other persons    ) *
     for certain services rendered    )
     to Trust                         )

     IV.  DISTRIBUTION AND REDEMPTION OF SECURITIES

35.  Distribution of Trust's          ) Public Offering of Units-
     securities by states             ) Public Distribution

36.  Suspension of sales of Trust's   ) *
     securities                       )

37.  Revocation of authority to       ) *
     distribute                       )

38.  (a)  Method of distribution      ) Public Offering of Units
     (b)  Underwriting agreements     )
     (c)  Selling agreements          )

39.  (a)  Organization of principal   ) Sponsor
          Underwriter                 )
     (b)  N.A.S.D. membership of      )
          principal Underwriter       )

40.  Certain fees received by         ) Public Offering of Units-
     principal Underwriter            ) Profit of Sponsor

41.  (a)  Business of principal       ) Sponsor
          Underwriter                 )
     (b)  Branch officers of          ) *
          principal Underwriter       )
     (c)  Salesman of principal       ) *
          Underwriter

42.  Ownership of Trust's Securities  ) *
     by certain persons

43.  Certain brokerage commissions    ) *
     received by principal            )
     Underwriter                      )

44.  (a)  Method of valuation         ) Public Offering of Units
     (b)  Schedule as to offering     ) *
          price                       )
     (c)  Variation in offering       ) *
          price to certain persons    )


______________________

*    Not applicable, answer negative or not required.


<PAGE>


45.  Suspension of redemption rights  ) *

46.  (a)  Redemption valuation        ) Public Offering of Units-
                                      ) Secondary Market; Redemp-
                                      ) tion
     (b)  Schedule as to redemption   ) *
          price                       )

47.  Maintenance of position in       ) See items 10(d), 44
     underlying securities            ) and 46

     V.   INFORMATION CONCERNING THE TRUSTEE
          OR CUSTODIAN

48.  Organization and regulation of   ) Trustee
     Trustee

49.  Fees and expenses of Trustee     ) Summary of Essential
                                      ) Information; Expenses and
                                      ) Charges

50.  Trustee's lien                   ) Expenses and Charges

     VI.  INFORMATION CONCERNING INSURANCE OF
          HOLDERS OF SECURITIES

51.  (a)  Name and address of         ) *
          Insurance Company           )
     (b)  Type of policies            ) *
     (c)  Type of risks insured and   ) *
          excluded                    )
     (d)  Coverage of policies        ) *
     (e)  Beneficiaries of policies   ) *
     (f)  Terms and manner of         ) *
          cancellation                )
     (g)  Method of determining       ) *
          premiums                    )
     (h)  Amount of aggregate         ) *
          premiums paid               )
     (i)  Who receives any part of    ) *
          premiums                    )
     (j)  Other material provisions   ) *
          of the Trust relating to    )
          insurance                   )



______________________

*    Not applicable, answer negative or not required.


<PAGE>


     VII.  POLICY OF REGISTRANT

52.  (a)  Method of selecting and     ) Introduction; The Trust-
          eliminating securities from ) Objectives and Securities
          the Trust                   ) Selection; -Summary
                                      ) Description of the
                                      ) Portfolio
     (b)  Elimination of securities   ) *
          from the Trust              )
     (c)  Policy of Trust regarding   ) Introduction; The Trust-
          substitution and elimina-   ) Objectives and
          tion of securities          ) Securities Selection
     (d)  Description of any funda-   ) *
          mental policy of the Trust  )

53.  Taxable status of the Trust      ) Cover of Prospectus;
                                      ) Tax Status of the Trust

     VIII.  FINANCIAL AND STATISTICAL INFORMATION

54.  Information regarding the        ) *
     Trust's past ten fiscal years    )

55.  Certain information regarding    ) *
     periodic payment plan certifi-   )
     cates                            )

56.  Certain information regarding    ) *
     periodic payment plan certifi-   )
     cates                            )

57.  Certain information regarding    ) *
     periodic payment plan certifi-   )
     cates                            )

58.  Certain information regarding    ) *
     periodic payment plan certifi-   )
     cates                            )

59.  Financial statements             ) Statement of Financial
     (Instruction 1(c) to Form S-6)   ) Condition




______________________

*    Not applicable, answer negative or not required.


<PAGE>
[LOGO]
    DEAN
    WITTER
    SELECT
    Government Trust

   
U.S. TREASURY SERIES 8
(LADDERED MATURITIES)
--------------------------------------
    
--------------------------------------

500,000 Units
(A Unit Investment Trust)

STANDARD & POOR'S CORPORATION RATING: AAA
--------------------------------------------------------------------------------

   
The Trust was formed for the purpose of providing safety of capital and current
monthly distributions of interest through investment in a portfolio consisting
primarily of current interest-bearing United States Treasury obligations that
are backed by the full faith and credit of the United States Government. The
Securities will mature in a "laddered" fashion over approximately five years and
will provide for the return to the Unit Holders of approximately 20% of the per
Unit face amount of the Securities initially included in the Trust approximately
every 12 months beginning in 1996. The value of the Units of the Trust will
fluctuate with the value of the portfolio of underlying Securities. Interest
income (including original issue discount) or capital gains, if any, are exempt
from federal withholding taxes for qualified foreign investors if certain
conditions are met. UNITS OF A TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR
GUARANTEED OR ENDORSED BY, ANY BANK, AND THE UNITS ARE NOT FEDERALLY INSURED BY
THE FEDERAL DEPOSIT INSURANCE CORPORATION, FEDERAL RESERVE BOARD OR ANY OTHER
AGENCY.
    
--------------------------------------------------------------------------------

Sponsor:  (DEAN WITTER REYNOLDS INC. LOGO)

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

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
--------------------------------------------------------------------------------

READ AND RETAIN THIS PROSPECTUS FOR FUTURE REFERENCE.

   
                        PROSPECTUS DATED MARCH 14, 1995
    
<PAGE>
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                       ATTENTION FOREIGN INVESTORS: YOUR
                        INCOME FROM THIS TRUST IS EXEMPT
                      FROM FEDERAL WITHHOLDING TAXES WHEN
                 CERTAIN CONDITIONS ARE MET UNDER CURRENT LAW.
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
<PAGE>
    This  Prospectus does not contain all of the information with respect to the
investment company set forth in its registration statement and exhibits relating
thereto which  have been  filed  with the  Securities and  Exchange  Commission,
Washington, D.C. under the Securities Act of 1933 and the Investment Company Act
of 1940, and to which reference is hereby made.

   
                      DEAN WITTER SELECT GOVERNMENT TRUST
                             U.S. TREASURY SERIES 8
    

                               TABLE OF CONTENTS

   
<TABLE>
<CAPTION>
                                                        PAGE
                                                        -----
<S>                                                     <C>
Table of Contents.....................................      i
Summary of Essential Information......................     ii
Independent Auditor's Report..........................     vi
Statement of Financial Condition......................    vii
Schedule of Portfolio Securities......................   viii
Introduction..........................................      1
The Trust.............................................      1
    Risk Factors -- Special Considerations............      1
    Summary Description of the Portfolio..............      2
    Rating of Units...................................      3
    Objectives and Securities Selection...............      3
    The Units.........................................      3
    Estimated Annual Income, Estimated Current Return
      and Estimated Long-Term Return..................      3
Tax Status of the Trust...............................      4
Retirement Plans......................................      5
Public Offering of Units..............................      6
    Public Offering Price.............................      6
    Public Distribution...............................      6
    Secondary Market..................................      6
    Profit of Sponsor.................................      7
    Volume Discount...................................      7
Reinvestment Program..................................      7
Redemption............................................      8
    Right of Redemption...............................      8
    Computation of Redemption Value...................      8
    Postponement of Redemption........................      9
Rights of Unit Holders................................      9
    Unit Holders......................................      9
    Certain Limitations...............................      9
Expenses and Charges..................................      9
    Initial Expenses..................................      9
    Fees..............................................      9
    Other Charges.....................................     10
Administration of the Trust...........................     10
    Records and Accounts..............................     10
    Distribution......................................     10
    Distribution from the Interest and Principal
     Accounts.........................................     10
    Reports to Unit Holders...........................     11
Sponsor...............................................     12
Trustee...............................................     12
Evaluator.............................................     13
Amendment and Termination.............................     13
Legal Opinions........................................     14
Auditors..............................................     14
Description of Rating.................................     14
</TABLE>
    

   
<TABLE>
<CAPTION>
         SPONSOR                      EVALUATOR                      TRUSTEE
-------------------------     -------------------------     -------------------------
<S>                           <C>                           <C>
Dean Witter Reynolds Inc.       Kenny S&P Evaluation          The Bank of New York
 Two World Trade Center               Services,                101 Barclay Street
New York, New York 10048            a division of           New York, New York 10286
                                J. J. Kenny Co., Inc.
                                     65 Broadway
                              New York, New York 10006
</TABLE>
    

    NO   PERSON  IS  AUTHORIZED   TO  GIVE  ANY  INFORMATION   OR  TO  MAKE  ANY
REPRESENTATIONS WITH RESPECT TO  THIS INVESTMENT COMPANY  NOT CONTAINED IN  THIS
PROSPECTUS  AND ANY INFORMATION OR REPRESENTATION  NOT CONTAINED HEREIN MUST NOT
BE RELIED UPON AS HAVING BEEN AUTHORIZED. THIS PROSPECTUS DOES NOT CONSTITUTE AN
OFFER TO SELL, OR A SOLICITATION OF AN OFFER TO BUY, SECURITIES IN ANY STATE  TO
ANY PERSON TO WHOM IT IS NOT LAWFUL TO MAKE SUCH OFFER IN SUCH STATE.

                                       i
<PAGE>
   
                        SUMMARY OF ESSENTIAL INFORMATION
                      DEAN WITTER SELECT GOVERNMENT TRUST
                             U.S. TREASURY SERIES 8
                             AS OF MARCH 13, 1995+
    

   
<TABLE>
<S>                                                           <C>
Face Amount of Securities...................................  $500,000.00
Number of Units.............................................      500,000++
Fractional  Undivided Interest  in the  Trust Represented by
  Each Unit.................................................    1/500,000th
Public Offering Price per 1,000 Units
    Aggregate offering side evaluation of Securities in  the
     Trust..................................................  $   498,811
                                                              -----------
    Divided by 500,000 Units multiplied by 1,000............  $    997.62
    Plus  sales charge  of 1.500%  of Public  Offering Price
     (1.523% of net amount invested in Securities)..........        15.19
                                                              -----------
Public Offering Price per 1,000 Units*......................  $  1,012.81
                                                              -----------
                                                              -----------
Sponsor's Repurchase Price  and Redemption  Price per  1,000
  Units   (based  on  bid   side  evaluation  of  underlying
  Securities, $15.82  less than  Public Offering  Price  per
  1,000 Units)..............................................  $    996.99
                                                              -----------
                                                              -----------
Calculation  of Estimated Net Annual Interest Rate per 1,000
  Units (based on face amount of $1,000 per 1,000 Units)
    Annual Interest rate per 1,000 Units....................       7.050%
  Less estimated  annual  expenses per  1,000  Units  ($1.93
   expressed as a percentage)...............................        .193%
                                                              -----------
Estimated net annual interest rate per 1,000 Units..........       6.857%
                                                              -----------
                                                              -----------
Daily Rate at which Estimated Net Interest Accrues per 1,000
  Units.....................................................       0.019%
Estimated   Long-Term  Return  (based   on  Public  Offering
  Price)**..................................................       6.617%
Estimated  Current   Return   (based  on   Public   Offering
  Price)**..................................................       6.770%
Monthly Interest Distributions per 1,000 Units
    First  distribution,  to be  paid on  April 15,  1995 to
     Holders of record on April 9, 1995.....................  $      4.69
    Calculation of second and following distributions:
    Estimated net annual interest income....................  $     68.57
    Divided by 12...........................................  $      5.71
</TABLE>
    

   
<TABLE>
<S>                                                           <C>
Mandatory Termination Date..................................  February 1, 2000
Sponsor's Profit on Deposit.................................  None
Record Date:................................................  Interest  distributions:  the  ninth  day  of  each   month.
                                                              Principal  distributions: the  first business  day following
                                                              the maturity of each Security.
Distribution Date:..........................................  Interest distributions:  the fifteenth  day of  each  month.
                                                              Principal  distributions: the  third business  day following
                                                              the maturity of each Security.
Minimum Principal Distribution:.............................  No distribution need be made  from the Principal Account  if
                                                              balance   therein  is  less  than   $1.00  per  1,000  Units
                                                              outstanding.
Trustee's  Annual  Fee  and  Expenses  (including  estimated
expenses  and Evaluator's fee): $1.68 per $1,000 face amount
of underlying Securities payable commencing
April 9, 1995...............................................  $1.68
Sponsor's Annual Portfolio Supervision Fee: Maximum of  $.25
per $1,000 face amount of underlying Securities.............  0.25
                                                              ------------------------------------------------------------
Total Estimated Annual Expense per 1,000 Units..............  $1.93
                                                              ------------------------------------------------------------
                                                              ------------------------------------------------------------
Evaluator's  Fee for  each Evaluation: $10.00  plus $.40 for
each issue of underlying Securities
Evaluation Time:............................................  11:00 A.M. New York  Time on Date of  Deposit and 4:00  P.M.
                                                              thereafter
</TABLE>
    

                                       ii
<PAGE>
   
<TABLE>
<S>                                                           <C>
Discretionary Liquidation Amount:...........................
<FN>                                                          The  Indenture may be terminated by the Sponsor if the value
                                                              of the Trust  at any  time is less  than 40%  of the  market
                                                              value of Securities deposited in the Trust.+++
---------
   +The  Date of Deposit. The Date of Deposit is the date on which the Indenture
was signed and the deposit of Securities with the Trustee was made.

  ++The number of  Units will be  increased as the  Sponsor deposits  additional
Securities into the Trust. (See "Introduction".)

 +++The  final distribution  will be made  within 5 business  days following the
receipt of  proceeds  from  the  sale  of all  Securities  in  the  Trust.  (See
"Administration of the Trust -- Termination".)

   *No accrued interest will be added to the Public Offering Price in connection
with  purchases  of Units  contracted for  on  March 14,  1995. With  respect to
purchases contracted for after such date, accrued interest from March 21,  1995,
the first expected settlement date, to, but not including the date of settlement
(normally  five  business  days after  purchase)  will  be added  to  the Public
Offering Price.

  **The Estimated Current Return  is calculated by dividing  the product of  the
Estimated  Net Annual Interest Rate per Unit times $1,000 by the Public Offering
Price. The Estimated Net Annual Interest Rate will vary with changes in fees and
expenses of the Trustee and the  Evaluator and with the principal prepayment  or
redemption,  if applicable, maturity,  exchange or sale  of Securities while the
Public Offering  Price will  vary with  changes  in the  offering price  of  the
underlying  Securities;  therefore,  there  is  no  assurance  that  the present
Estimated Current Return  indicated above will  be realized in  the future.  The
Estimated  Long Term Return is  calculated using a formula  which (1) takes into
consideration, and factors  in the  relative weightings of,  the market  values,
yields  (which takes into account the amortization of premiums and the accretion
of discounts) and estimated  retirements of all of  the Securities in the  Trust
and  (2) takes into account  the expenses and sales  charge associated with each
Unit. Since the market  values and estimated retirements  of the Securities  and
the  expenses of the Trust  will change, there is  no assurance that the present
Estimated Long Term Return  as indicated above will  be realized in the  future.
The  Estimated Current  Return and  Estimated Long  Term Return  are expected to
differ because the calculation  of the Estimated Long  Term Return reflects  the
estimated  date and  amount of  principal returned  while the  Estimated Current
Return calculations include only estimated net annual interest income and Public
Offering Price as of the Date of Deposit.
</TABLE>
    

    The Estimated Long Term  Return and Estimated  Current Return are  increased
for  transactions  entitled  to  a  reduced sales  charge.  (See  "The  Trust --
Estimated Annual  Income,  Estimated  Current Return  and  Estimated  Long  Term
Return" and "Public Offering of Units -- Volume Discount".)

                                      iii
<PAGE>
                SUMMARY OF ESSENTIAL INFORMATION -- (CONTINUED)

   
    THE TRUST -- The Dean Witter Select Government Trust, U.S. Treasury Series 8
(the  "Trust")  is  a  unit  investment  trust  composed  primarily  of  current
interest-bearing United States Government Treasury obligations issued after July
18, 1984 or contracts  to purchase such obligations,  listed in the Schedule  of
Portfolio  Securities  herein  (the  "Securities").  The  Securities  are direct
obligations of the United States and are backed by the full faith and credit  of
the  United States Government. The Trust was created under the laws of the State
of New York pursuant to an Indenture (as hereinafter defined). The objectives of
the Trust are to provide safety of capital and current monthly distributions  of
interest  through  investment in  a  portfolio consisting  primarily  of current
interest-bearing United States Treasury obligations.  After the initial Date  of
Deposit,  the Sponsor  may deposit additional  Securities in  the Trust (whereby
additional Units would be offered to  the public) provided that such deposit  of
additional  Securities (the  "Additional Securities")  maintains, to  the extent
possible, the original proportionate relationship with respect to the  principal
amounts  of Securities of  specified interest rates and  ranges of maturities in
the Trust. (See: "The Trust -- Special Considerations".)
    

   
    The  Trust  consists  of  a  fixed  portfolio  of  United  States   Treasury
obligations  with consecutive annual  maturities ranging from  March 31, 1996 to
January 15, 2000 (referred to as "laddered maturities"). By doing so, the  Trust
maintains  a  portion  of  the  Portfolio  in  longer-term  Securities.  As  the
Securities mature, the Trust will return to Unit Holders approximately every  12
months  beginning in 1996, approximately 20% of  the per Unit face amount of the
Securities initially included in the Trust. If interest rates rise, Unit Holders
may  be  able  to  reinvest   their  principal  distributions  as  received   in
higher-yielding obligations. Therefore, Unit Holders are not "locking up" all of
their  principal investment over the life  of the Trust. Conversely, however, if
interest rates decline, Unit Holders will be receiving payments of principal  at
times  when only lower-yielding investments of comparable quality are available.
Reinvesting at such time may result in an over-all lower yield than would result
from a single investment maturing at the close of the life of the Trust.
    

    MONTHLY DISTRIBUTIONS -- Monthly distributions  of interest will be made  on
or  shortly after the fifteenth  day of each month to  Unit Holders of record on
the ninth day of each month commencing  with the first distribution on the  date
indicated  herein. Distribution of principal upon maturity of each Security will
be made on the third  business day after the maturity  date of such Security  to
Holders  of record on the  first business day following  such maturity date. The
Sponsor believes that interest income from this Trust (including original  issue
discount) should be free from state income taxes on individuals. In addition, an
exemption  from federal withholding taxes is available to qualified foreign Unit
Holders meeting certain requirements. (See: "Tax Status of the Trusts").

    Principal  from  sales,  redemptions  and   maturities  of  bonds  will   be
distributed  as received, to the extent not utilized for the redemption of Units
or payment of  Trust expenses. Interest  payments will decline  as principal  is
returned.

    SECURITIES  -- Five issues of Securities were  deposited in the Trust on the
initial Date of Deposit  in the following proportions  based on a percentage  of
total principal amount:

   
<TABLE>
<CAPTION>
                                          PROPORTIONATE RELATIONSHIP
          TITLE OF SECURITY                     OF FACE AMOUNT
          ------------------------------  --------------------------
          <S>                             <C>
          7.750% U.S. Treasury Notes Due
           March 31, 1996                              20%
          7.500% U.S. Treasury Notes Due
           January 31, 1997                            20
          7.250% U.S. Treasury Notes Due
           February 15, 1998                           20
          6.375% U.S. Treasury Notes Due
           January 15, 1999                            20
          6.375% U.S. Treasury Notes Due
           January 15, 2000                            20
                                                      100%
</TABLE>
    

    PRIMARY  MARKET PUBLIC OFFERING  PRICE -- The  Initial Public Offering Price
per 1,000  Units is  equal to  the  aggregate offering  side evaluation  of  the
underlying  Securities (the price  at which they could  be directly purchased by
the public  assuming  they were  available),  divided  by the  number  of  Units
outstanding  multiplied by 1,000, plus a sales charge of 1.523% of such offering
side evaluation per  1,000 Units (the  net amount invested);  this results in  a
sales  charge of  1.5% of the  Public Offering  Price. Units are  offered at the
Public Offering Price  plus accrued  interest on the  underlying Securities  for
Units  which settle after the first settlement date for the Units (normally five
business days after purchase). (See: "Public Offering of Units").

    SECONDARY MARKET FOR UNITS  -- The Sponsor, though  not obligated to do  so,
intends  to maintain a secondary market for the Units based on the aggregate bid
side evaluation of the underlying Securities. If such market is not  maintained,
a  Unit Holder will be able to dispose of his Units through redemption at prices
based on the aggregate  bid side evaluation of  the underlying Securities  (see:
"Redemption").  Market conditions  may cause such  prices to be  greater or less
than the amount paid for Units.

   
    RISK FACTORS -- SPECIAL CONSIDERATIONS --An investment in Units of the Trust
should be made with an understanding of  the risks which an investment in  fixed
rate debt obligations with maturities of one to five years may entail, including
the  risk that the  value of the  Units will decline  with increases in interest
rates. An increase in interest rates can be expected to reduce the value of  the
Securities and result in a loss to Unit Holders selling or redeeming Units prior
to  the maturity of each Security. In addition,  an early redemption at par of a
security purchased  at a  premium, if  applicable, or  a maturity  at par  of  a
security  purchased at a premium will result in  a reduction in yield and a loss
of principal to the Unit Holders. The timing and percentage amount of  principal
return  may vary from  the estimated cash  flow schedule on  the Date of Deposit
    

                                       iv
<PAGE>
resulting in the increase in, the decrease  in, or the elimination of, a  return
of principal in one or more years. The Trust is considered to be concentrated in
Securities  issued by the United  States of America. (See  "The Trust -- Special
Considerations" and "The Trust -- Summary Description of the Portfolio".)

    PUBLIC DISTRIBUTION -- Sales of Units  may be made pursuant to  distribution
arrangements  with certain banks and/or other  entities subject to regulation by
the Office of the  Comptroller of the  Currency (including NationsSecurities,  a
partnership  created pursuant  to a joint  venture between  NationsBank of North
Carolina, N.A. and an affiliate of the  Sponsor) which are acting as agents  for
their  customers.  These banks  and/or entities  are making  Units of  the Trust
available to their customers on an agency  basis. A portion of the sales  charge
paid  by these customers is retained by or remitted to such banks or entities in
an amount equal to the fee customarily  received by an agent for acting in  such
capacity  in  connection with  the  purchase of  Units.  The Glass  Steagall Act
prohibits banks from  underwriting certain  securities, including  Units of  the
Trust;  however, this Act  does permit certain  agency transactions, and banking
regulators have  not indicated  that these  particular agency  transactions  are
impermissible  under this Act.  In Texas, as  well as certain  other states, any
bank making Units available must be registered as a broker-dealer in that State.

    MINIMUM PURCHASE -- $1,000 ($250 for IRAs).

                  TABLE OF ESTIMATED CASH FLOW TO UNIT HOLDERS

   
    The  table  below  sets  forth,  per  1,000  Units,  the  estimated  monthly
distributions  of principal  and interest to  Unitholders. The  table assumes no
changes in expenses and no exchanges,  redemptions, sales or prepayments of  the
underlying  Securities  prior  to maturity  and  the receipt  of  principal upon
maturity. Actual distributions may vary.
    
   
<TABLE>
<CAPTION>
               DATE                  $ AMOUNT
-----------------------------------  ---------
<S>                                  <C>
April 1995                                4.69
May 1995-March 1996                       5.71
April 1996                              209.09
May 1996-January 1997                     4.45
February 1997                           207.72
March 1997-January 1998                   3.24

<CAPTION>
               DATE                  $ AMOUNT
-----------------------------------  ---------
<S>                                  <C>

February 1998                           206.39
March 1998-December 1998                  2.06
January 1999                            204.83
February 1999-December 1999               1.03
January 2000                            203.80
</TABLE>
    

                                       v
<PAGE>
                          INDEPENDENT AUDITORS' REPORT

THE UNIT HOLDERS, SPONSOR AND TRUSTEE
DEAN WITTER SELECT GOVERNMENT TRUST
   
U.S. TREASURY SERIES 8
    

   
    We  have  audited  the  accompanying statement  of  financial  condition and
schedule of portfolio  securities of  the Dean Witter  Select Government  Trust,
U.S. Treasury Series 8, as of March 13, 1995. These financial statements are the
responsibility  of the Trustee.  Our responsibility is to  express an opinion on
these financial statements based on our audit.
    

   
    We conducted  our  audit  in accordance  with  generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence  supporting
the amounts and disclosures in the financial statements. Our procedures included
confirmation  of the irrevocable letter of credit and contracts for the purchase
of securities, as shown in the statement of financial condition and schedule  of
portfolio  securities as of March  13, 1995, by correspondence  with The Bank of
New  York,  the  Trustee.  An  audit  also  includes  assessing  the  accounting
principles  used  and significant  estimates  made by  the  Trustee, as  well as
evaluating the overall  financial statement  presentation. We  believe that  our
audit provides a reasonable basis for our opinion.
    

   
    In  our  opinion,  the  statement of  financial  condition  and  schedule of
portfolio securities referred to above present fairly, in all material respects,
the financial position of the Dean Witter Select Government Trust, U.S. Treasury
Series 8 as of March 13,  1995 in conformity with generally accepted  accounting
principles.
    

   
DELOITTE & TOUCHE LLP
    
   
MARCH 13, 1995
    
NEW YORK, NEW YORK

                                       vi
<PAGE>
                        STATEMENT OF FINANCIAL CONDITION

   
                      DEAN WITTER SELECT GOVERNMENT TRUST
                             U.S. TREASURY SERIES 8
                              AS OF MARCH 13, 1995
    

   
<TABLE>
<CAPTION>
     TRUST PROPERTY
     <S>                             <C>               <C>
         Sponsor's Contracts to
          Purchase underlying
          Securities backed by an
          irrevocable letter of
          credit (a)...............                      $   498,811.00
         Accrued interest to Date
          of Deposit on underlying
          Securities(a) (b)........                            6,869.53
                                                       ---------------
           Total...................                      $   505,680.53
                                                       ---------------
                                                       ---------------

     LIABILITY AND INTEREST OF UNIT
       HOLDERS
         Liability:
           Accrued interest to Date
            of Deposit on
            underlying Securities
            (a) (b)................                      $     6,869.53
         Interest of Unit Holders:
           Units of fractional
            undivided interest
            outstanding:
             Cost to investors
              (c)..................    $   506,406.00
             Gross underwriting
              commissions (d)......         (7,595.00)   $   498,811.00
                                     ---------------   ---------------
               Total...............                      $   505,680.53
                                                       ---------------
                                                       ---------------
<FN>

(a)  The  aggregate value of the Securities represented by Contracts to Purchase
     listed under "Schedule of Portfolio Securities" and their cost to the Trust
     are the same. The  value is determined  by the Evaluator  on the basis  set
     forth  under  "Public  Offering  of Units  --  Public  Offering  Price". An
     irrevocable letter of credit drawn on Morgan Guaranty Trust Company of  New
     York  in the amount of $600,000.00 has been deposited with the Trustee. The
     amount of the letter of credit includes $498,811.00 (equal to the  Purchase
     Price to Sponsor) for the purchase of $500,000.00 face amount of Securities
     pursuant  to  contracts  to purchase  Securities,  plus  $6,869.53 covering
     accrued interest thereon.

(b)  The Trustee will  advance an amount  equal to the  accrued interest on  the
     underlying  Securities to the first expected settlement date (normally five
     business days after purchase)  and such amount will  be distributed to  the
     Sponsor  as the holder of record on such  date as set forth under Part B --
     "Public Offering of Units -- Public Offering Price."

(c)  The aggregate  Public Offering  Price (exclusive  of accrued  interest)  is
     computed  on the basis set forth under  "Public Offering of Units -- Public
     Offering Price".

(d)  The aggregate sales charge of 1.50%  of the Public Offering Price per  Unit
     is  computed on  the basis  set forth  under "Public  Offering of  Units --
     Public Offering Price".

(e)  The Trustee  has  custody  of/and responsibility  for  all  accounting  and
     financial  books,  records, financial  statements and  related data  of the
     Trust and  is responsible  for  establishing and  maintaining a  system  of
     internal  control directly related  to, and designed  to provide reasonable
     assurance as to the integrity and reliability of financial reporting of the
     Trust. The  Trustee is  also  responsible for  all estimates  and  accruals
     reflected in the Trust's financial statements. The Evaluator determines the
     price  for each  underlying Security  included in  the Trust's  Schedule of
     Portfolio Securities on the basis set  forth in Part B -- "Public  Offering
     of  Units -- Public Offering  Price." Under the Securities  Act of 1933, as
     amended (the "Act"), the Sponsor is deemed  to be an issuer of the  Trust's
     Units.  As such, the Sponsor has the  responsibility of an issuer under the
     Act with  respect to  financial statements  of the  Trust included  in  the
     Registration Statement under the Act and amendments thereto.
</TABLE>
    

                                      vii
<PAGE>
                      [THIS PAGE INTENTIONALLY LEFT BLANK]
<PAGE>
                                                             OFFERING HIGHLIGHTS

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

   
Dean Witter Select Government Trust
U.S. Treasury Series 8
(Laddered Maturities)
    
----------------------------------------------
      NOW FOR AS LITTLE AS $1,000, YOU CAN INVEST IN
   A "AAA" RATED PORTFOLIO OF U.S. TREASURY SECURITIES AND ENJOY THESE IMPORTANT
   BENEFITS:
------------------------------------------------------

    - SAFETY AND QUALITY -- The Trust invests in U.S. Treasury securities, which
      are backed by the full faith and credit of the United States Government.

    - LADDERED MATURITIES -- The Trust's Portfolio has been structured to
      maintain a portion of the Portfolio in longer-term securities while paying
      a portion of the face value of your principal investment at intervals over
      the life of the Trust, rather than only at termination.

    - MONTHLY INCOME -- The Trust offers investors monthly distributions of
      interest.

    - INCOME FREE FROM STATE INCOME TAXES -- The Sponsor believes that the
      interest income from the Trust (including original issue discount) should
      be free from state income taxes on individuals.

    - TAX-EXEMPT FOR FOREIGN INVESTORS -- Interest (including original issue
      discount) and capital gains are exempt from federal withholding taxes for
      qualified foreign investors if certain conditions are met.

    The Offering Features are a part of the prospectus and should be read in
                                  conjunction
                          with the entire prospectus.
<PAGE>
Invest for Safety of Capital and Current Monthly
Income Through a Portfolio of U.S. Treasury Securities.

-------------------------------------------------------------
SAFETY AND QUALITY

       U.S. Treasury securities are considered one of the most attractive
       investments available. They are regarded as a "safe" investment since
       payment of interest and principal is an obligation of the United States
       Government. Although the Units of the Trust are not guaranteed by the
       United States Government, Standard & Poor's Corporation has rated Units
       of the Trust "AAA". This rating is assigned to investments offering the
       highest degree of safety and quality.

--------------------------------------------------------------------------------
LADDERED MATURITIES

   
       The portfolio of the Trust consists of government securities with annual
       maturities ranging from March 31, 1996 to January 15, 2000. The Trust
       will distribute approximately 20% of the per Unit face amount of the
       securities initially included in the Trust as received approximately
       every 12 months, beginning in 1996. By structuring the Portfolio in this
       way, the Trust maintains a portion of the Portfolio in longer-term
       securities while paying a portion of the face value of your principal
       investment at intervals over the life of the Trust, rather than paying
       the entire amount at the termination of the Trust. If interest rates
       rise, a portion of your investment will then be available for you to
       reinvest at higher rates. If interest rates fall, the portion of monies
       that remains invested will continue to earn relatively higher rates of
       income, although the portion that is distributed can be reinvested in
       comparable securities only at these lower rates.
    

--------------------------------------------------------------------------------
DEFINED PORTFOLIO

       The Trust is a fixed portfolio -- all of the securities in the Trust are
       listed in the Prospectus so you know in advance what you are purchasing
       and avoid the difficulty of assembling a portfolio on your own. Principal
       is returned on fixed dates specified in the Prospectus so you know when
       to expect distributions before you invest.

--------------------------------------------------------------------------------
MONTHLY INCOME

       Even though U.S. Treasury securities pay interest on a semi-annual basis,
       the Trust will make interest distributions monthly. Or, if you prefer,
       you may have these earnings reinvested automatically.

--------------------------------------------------------------------------------
AUTOMATIC REINVESTMENT

       Investors may elect to automatically reinvest interest income, as well as
       principal distributions, in the Dean Witter US Government Money Market
       Trust. Reinvesting interest and principal keeps your capital continually
       working for you.

--------------------------------------------------------------------------------
INCOME FREE FROM STATE INCOME TAXES

       The Sponsor believes that interest income from the Trust (including
       original issue discount) should be free from state income taxes on
       individuals. Please check with your tax counsel.

    The Offering Features are a part of the prospectus and should be read in
                                  conjunction
                          with the entire prospectus.
<PAGE>

--------------------------------------------------------------------------------
TAX EXEMPT TO FOREIGN HOLDERS

       A qualified foreign holder will not be subject to federal withholding
       taxes on any interest (including original issue discount) or capital
       gains derived through the Trust if certain conditions are met.

--------------------------------------------------------------------------------
LOW MINIMUM INVESTMENT

       Each Unit is conveniently priced at approximately $1.00 and the minimum
       purchase is $1,000 ($250 for IRAs).

--------------------------------------------------------------------------------
VOLUME DISCOUNTS

       The price of each Unit is based on the offering side value of the U.S.
       Treasury securities in the portfolio. The offering price during the
       initial offering period includes a maximum one-time sales charge of
       1.50%. Volume discounts are available on orders of $250,000 or more.

--------------------------------------------------------------------------------
LIQUIDITY AT NO CHARGE

       All or a portion of your Units can be redeemed at any time, without
       charge. The price you receive is based on the underlying bid side
       evaluation of the Treasury securities in the portfolio as determined each
       day by an independent evaluator. The price you receive will reflect the
       current market conditions and could be more or less than the price
       originally paid.

--------------------------------------------------------------------------------
RETIREMENT ACCOUNTS

       The Dean Witter Select Government Trust, U.S. Treasury Portfolio may be a
       suitable investment for a tax-deferred retirement account such as an IRA
       or Keogh plan.
--------------------------------------------------------------------------------

    The Offering Features are a part of the prospectus and should be read in
                                  conjunction
                          with the entire prospectus.
<PAGE>
   
                               PROSPECTUS PART B
                      DEAN WITTER SELECT GOVERNMENT TRUST
                             U.S. TREASURY SERIES 8
    

                                  INTRODUCTION

   
    The  Dean  Witter  Select  Government Trust,  U.S.  Treasury  Series  8 (the
"Trust") was created under the laws of the State of New York pursuant to a Trust
Indenture and Agreement and a  related Reference Trust Agreement  (collectively,
the  "Indenture"),* among Dean Witter Reynolds Inc. (the "Sponsor"), The Bank of
New York (the "Trustee") and Kenny S&P Evaluation Services, a division of J.  J.
Kenny  Co., Inc. (the "Evaluator"). The Sponsor, Dean Witter Reynolds Inc., is a
principal operating subsidiary of Dean Witter, Discover & Co., a publicly traded
corporation. (See:  "Sponsor".)  The objectives  of  the Trust  are  to  provide
investors  with safety of capital and  current monthly distributions of interest
through investment  in  a  fixed  portfolio  of  Securities  (the  "Portfolio"),
consisting  of U.S. Treasury obligations, which are backed by the full faith and
credit of  the United  States  Government. Because  the Securities  (as  defined
below)  in the Trust  have consecutive or "laddered"  maturities, the Trust will
maintain a portion of  the Portfolio in longer-term  securities while paying  to
Unit  Holders a portion of  the principal invested each  year, commencing in the
year set forth in the first part of this prospectus.
    

    On the date of creation  of the Trust (the  "Date of Deposit"), the  Sponsor
deposited  with the  Trustee the underlying  securities and  contracts and funds
(represented by the irrevocable letter(s)  of credit issued by major  commercial
bank(s)) for the purchase of such securities (the "Securities"). (See: "Schedule
of  Portfolio  Securities".)  The  Trust  was  created  simultaneously  with the
execution of the Indenture and the  deposit of the Securities with the  Trustee.
The Trustee then immediately delivered to the Sponsor certificates of beneficial
interest  (the "Certificates")  representing the units  (the "Units") comprising
the entire  ownership of  the Trust.  Through this  Prospectus, the  Sponsor  is
offering  the Units, including  Additional Units, as defined  below, for sale to
the public. The holders of Certificates (the "Unit Holders") will have the right
to have  their  Units redeemed  at  a price  based  on the  aggregate  bid  side
evaluation  of the Securities (the "Redemption Price") if they cannot be sold in
the secondary market which the Sponsor,  although not obligated to, proposes  to
maintain.  In addition, the  Sponsor may offer for  sale through this Prospectus
Units which the Sponsor may have repurchased in the secondary market or upon the
tender of such Units for redemption.

    With the deposit  of the  Securities in  the Trust  on the  initial Date  of
Deposit,  the  Sponsor  established  a  proportionate  relationship  between the
principal amounts of U.S. Treasury  obligations of specified interest rates  and
ranges  of maturities in  the Portfolio. During the  90-day period following the
initial Date of Deposit, the Sponsor is permitted under the Indenture to deposit
additional Securities (the "Additional  Securities") and any  cash in the  Trust
not  held for distribution to Unit Holders  prior to the deposit, resulting in a
corresponding increase  in  the number  of  Units outstanding  (the  "Additional
Units").  Such  Additional Units  may be  continuously offered  for sale  to the
public by means of this Prospectus. The Sponsor anticipates that any  Additional
Securities  deposited in  the Trust during  the 90-day period  subsequent to the
initial Date  of Deposit  will maintain,  as far  as practicable,  the  original
proportionate  relationship  between  the  principal  amounts  of  U.S. Treasury
obligations of  specified  interest  rates  and  ranges  of  maturities  in  the
Portfolio  established  on  the Date  of  Deposit. Precise  duplication  of this
original proportionate relationship  may not  be possible  because fractions  of
U.S.  Treasury  obligations  may not  be  purchased  or for  other  reasons, but
duplication will continue to be the goal in connection with any such deposit  of
Additional  Securities.  (These  original  proportionate  relationships  on  the
initial Date of Deposit  are set forth in  "Summary of Essential  Information".)
Deposits  of Additional  Securities in  the Portfolio  subsequent to  the 90-day
period following  the  initial  Date  of  Deposit  must  replicate  exactly  the
proportionate  relationship among the principal amounts of Securities comprising
the Portfolio at the time of replication.

    On the  initial  Date  of  Deposit, each  Unit  represented  the  fractional
undivided interest in the Securities and net income of the Trust set forth under
"Summary of Essential Information" in the ratio of 1 Unit for each approximately
$1  principal amount  of Securities  initially deposited  in the  Trust. Because
regular payments of principal are to  be received and certain of the  Securities
will  mature  in  accordance with  their  terms  or may  be  sold  under certain
circumstances  described  herein  and  because  Additional  Securities  may   be
deposited  into the Trust from time to time, the Trust is not expected to retain
its present size and composition.  Units will remain outstanding until  redeemed
upon tender to the Trustee by any Unit Holder (which may include the Sponsor) or
until the termination of the Trust pursuant to the Indenture.

                                   THE TRUST

   
RISK FACTORS -- SPECIAL CONSIDERATIONS
    

    An  investment in Units of the Trust should be made with an understanding of
the risks  which  an investment  in  fixed  rate debt  obligations  may  entail,
including the risk that the value of the Portfolio, and hence of the Units, will
decline with increases in interest rates. The value of the underlying Securities
will  fluctuate inversely with  changes in interest rates.  In recent years, the
national economy has  experienced significant variations  in rates of  inflation
and  economic growth,  substantial increases  in the  national debt, substantial
increase in reliance upon foreign

---------
* Reference is hereby made to said Indenture and any statements contained herein
  are qualified in their entirety by the provisions of said Indenture.
<PAGE>

                                                                    No Postage
                                                                    Necessary
                                                                    If Mailed
                                                                    In The
                                                                    United
                              BUSINESS REPLY MAIL
                                                                    States
                   FIRST CLASS PERMIT NO. 40864 NEW YORK, N.Y.
      POSTAGE WILL BE PAID BY ADDRESSEE

   
      THE BANK OF NEW YORK
      DEAN WITTER SELECT GOVERNMENT TRUST
       REINVESTMENT PROGRAM
      UNIT INVESTMENT TRUST DIVISION
      P.O. BOX 974 -- WALL STREET STATION
      NEW YORK, N.Y. 10268-0974
    
<PAGE>
            DEAN WITTER SELECT GOVERNMENT TRUST REINVESTMENT PROGRAM
                                  REQUEST FORM

    I would like  to learn more  about the Reinvestment  Program offered by  the
Sponsor.  I  understand  that  my request  for  more  information  regarding the
Reinvestment Program in no way obligates  me to participate in the  Reinvestment
Program, and that this request form is not an offer to sell.

    Please send me more information, including a current prospectus for the Dean
Witter U.S. Government Money Market Trust.

<TABLE>
<S>                                                      <C>
Date:  , 19                                              Signature of
                                                         Registered Holder:
My name:                                                            (Two signatures if joint tenancy)
                         (please print)
                                                         My Social Security No.:
My address,
including Zip Code:                                      My Brokerage Firm's Name:
                             (please print)
                                                         City & State:
                                                         Brokerage Firm's
Signature:                                               Account Number:
                                      (All Information MUST Be Completed)
</TABLE>
<PAGE>
investors  to finance the  national debt, and  material reformulation of federal
tax, monetary and  regulatory policies.  These conditions  have been  associated
with  wide fluctuations in  interest rates and  thus in the  value of fixed rate
debt obligations.  The Sponsor  cannot predict  whether such  fluctuations  will
continue in the future.

    The  Securities in the Portfolio  were chosen in part  on the basis of their
respective stated maturity dates.  The ranges of maturity  dates of each of  the
Securities  contained in the  Portfolio are shown on  the "Schedule of Portfolio
Securities".

    The Trust may be an appropriate medium for investors who desire to invest in
a portfolio of taxable  fixed income federal securities  offering the safety  of
capital  provided by  an investment in  U.S. Treasury obligations  backed by the
full faith and credit  of the United States  Government. Investors in the  Trust
may find it advantageous to elect to reinvest the monthly distributions expected
to  be made by the  Trust, under the Reinvestment  Program of the Sponsor. (See:
"Reinvestment Program".)

    Certain of the Securities in  the Trust may have  been acquired at a  market
premium.  Securities  trade  at a  premium  because  the interest  rates  on the
Securities are higher than interest  on comparable debt securities being  issued
at  currently  prevailing  interest  rates. The  current  returns  of securities
trading at a market  premium are higher than  the current returns of  comparably
rated  debt securities of a similar type issued at currently prevailing interest
rates because  premium securities  tend  to decrease  in  market value  as  they
approach  maturity, when  the face amount  becomes payable. Because  part of the
purchase price  is thus  returned not  at maturity  but through  current  income
payments,  an early redemption at  par of a security  purchased at a premium, if
applicable, or a  maturity at  par of  a security  purchased at  a premium  will
result  in a reduction in yield and a  loss of principal to the Unit Holders. If
currently prevailing interest  rates for newly  issued and otherwise  comparable
securities  increase, the  market premium  of previously  issued securities will
decline and if currently prevailing  interest rates for newly issued  comparable
securities  decline,  the market  premium of  previously issued  securities will
increase, other things being equal. Market premium attributable to interest rate
changes does not indicate market confidence in the issue.

SUMMARY DESCRIPTION OF THE PORTFOLIO

    The Portfolio consists of Securities issued by the United States of  America
("Treasury  Obligations"), which are direct obligations of the United States and
therefore are  backed  by  the  full  faith and  credit  of  the  United  States
Government.  As  used  herein,  the term  "Securities"  includes  the Securities
initially deposited in the Trust listed under "Schedule of Portfolio Securities"
and any Additional Securities which may be acquired and held by the Trust in the
circumstances permitted by the provisions  of the Indenture. The Securities  are
different  issues of  bonds, notes, debentures  and other  debt obligations with
fixed final maturity dates. None of the Securities have any equity or conversion
features. Most of the Securities are current interest-bearing obligations of the
United States of America or, in the case of Securities not delivered on the Date
of Deposit,  contracts to  purchase such  obligations assigned  to the  Trustee.
Certain of the Securities may be "zero coupon" obligations of the United States.
A  zero coupon  bond makes  no present interest  payments. Rather,  it makes one
payment of its face amount at maturity.

    Treasury Obligations represent  100% of  the aggregate market  value of  the
Portfolio.  These Securities  are sold  by the  United States  Department of the
Treasury (the "Treasury")  to finance shortfalls  between the Treasury's  income
and  expenditures. Such  gaps may  have been  planned and  accounted for  in the
budget, or they may arise from unexpected changes in economic, political, fiscal
and other  circumstances.  Treasury Securities  constitute  public debt  of  the
United States and are, therefore, direct obligations of the United States.

    The  Trust  consists  of  the  Securities  (or  contracts  to  purchase such
Securities together with  an irrevocable  letter or  letters of  credit for  the
purchase  of such contracts) listed under  "Schedule of Portfolio Securities" as
long as such Securities may continue to be  held from time to time in the  Trust
(including certain securities deposited in the Trust in exchange or substitution
for  any  Securities  pursuant  to  the  Indenture)  together  with  accrued and
undistributed interest thereon  and undistributed and  uninvested cash  realized
from  the disposition of Securities. Because certain of the Securities from time
to time may be redeemed, if applicable, or will mature in accordance with  their
terms  or may be sold under  certain circumstances described herein, and because
Additional Securities may  be deposited into  the Trust from  time to time,  the
Trust  is not  expected to retain  for any length  of time its  present size and
composition.

    In the event of a  failure to deliver any  Security that has been  purchased
for  the Trust, including Securities purchased on a when, as and if issued basis
("Contract Obligations") (the "Failed  Security" in the case  of the failure  to
deliver a Security purchased for the Trust and a "Failed Contract Obligation" in
the  case  of the  failure to  deliver  a Contract  Obligation), the  Sponsor is
authorized under the Agreement to direct the Trustee to acquire other securities
(the "Replacement Securities") and  to substitute them in  the Portfolio of  the
Trust  within 90  days of the  initial Date  of Deposit. Should  any Security or
Contract  Obligation  fail,  and  Replacement  Securities  are  not  substituted
therefor  in the  Portfolio, the  Sponsor will  refund to  each Unit  Holder the
portion of the sales charge and the pro rata portion of the cost of such  Failed
Security or Failed Contract Obligation.

    Replacement  Securities must  be deposited with  the Trustee  within 20 days
after delivery of notice  of a Failed Security  or a Failed Contract  Obligation
(but  in no event later than the 90th day following the initial Date of Deposit)
and the purchase price  thereof (exclusive of accrued  interest) may not  exceed
the  amount of  funds reserved  by the  Trustee pursuant  to a  letter of credit
supplied by  the Sponsor  for the  purchase  of the  Failed Security  or  Failed
Contract   Obligation.  The   Replacement  Securities   must  (i)   be  Treasury
Obligations, (ii) have  a fixed  maturity approximately  the same  as the  fixed
maturity  of  the Security  replaced, and  (iii)  be purchased  at a  price that
results in a yield to maturity and in  a current return, in each case as of  the
date  on which such Replacement Securities are deposited with the Trustee, which
is equivalent (taking into consideration then current market conditions) to  the
yield  to maturity and current  return of the related  Failed Security or Failed
Contract

                                       2
<PAGE>
Obligation. Whenever a Replacement Security has been acquired for the Trust, the
Trustee shall,  within five  days thereafter,  notify all  Unit Holders  of  the
acquisition  of  the Replacement  Security  and shall,  no  later than  the next
Distribution Date, make a pro rata distribution of the amount, if any, by  which
the  cost to  the Trust  of the  Failed Security  or Failed  Contract Obligation
exceeded the cost of the Replacement Security.

    The Sponsor,  although  not  obligated  to do  so,  intends  to  maintain  a
secondary  market for  the Units on  the bid side  of the market  for the Units.
(See: "Public  Offering of  Units --  Secondary Market".)  Unit Holders  of  the
Trust,  in the absence of  a secondary market for Units,  will have the right to
have one or more of  their Units redeemed with the  Trustee at a price equal  to
the  Redemption Value thereof  (see: "Redemption"), based  on the then aggregate
bid price for the Securities in the Portfolio. Due to fluctuations in the market
price of the Securities in  the Portfolio and the  fact that the initial  Public
Offering  Price is based on the offering side of the market and includes a sales
charge, among  other factors,  the amount  realized by  a Unit  Holder upon  the
redemption  or sale of Units may  be less than the price  paid for such Units by
the Unit Holder.

RATING OF UNITS

    Standard & Poor's Corporation has rated  the Units of the Trust "AAA".  This
is  the  highest  rating  assigned  by  Standard  &  Poor's  Corporation.  (See:
"Description of Rating".) Standard & Poor's Corporation has been compensated  by
the Sponsor for its services in rating Units of the Trust.

OBJECTIVES AND SECURITIES SELECTION

    The  Trust was formed to provide  investors with an investment vehicle whose
objectives are safety of capital and current monthly distributions of  interest.
There is no guarantee, however, that the Trust's objectives will be achieved.

    Even  though the Portfolio consists  primarily of Treasury Obligations which
pay interest  no more  often than  semi-annually, the  Trust will  pay  interest
monthly through advances made by the Trustee, which will then be reimbursed when
interest   is  received   (see:  "Distributions  from   Interest  and  Principal
Accounts").

    In selecting Securities  for deposit  in the Trust,  the following  factors,
among  others, were considered by the Sponsor:  (i) the types of such securities
available; (ii)  the prices  and yields  of such  securities relative  to  other
comparable securities; and (iii) the maturities of such securities.

    The yields on Securities of the type deposited in the Trust are dependent on
a variety of factors, including general money market conditions, fluctuations in
interest rates, general conditions of the government securities markets, size of
a particular offering and the maturity of the obligations.

THE UNITS

    On  the  initial  Date  of Deposit,  each  Unit  represented  the fractional
undivided  interest  in  the  Trust  set  forth  under  "Summary  of   Essential
Information",  in the ratio of 1 Unit for each $1 principal amount of Securities
in the Trust. Thereafter, if Units are redeemed by the Trustee, the face  amount
of  Securities in  the Trust  will be reduced  by amounts  allocable to redeemed
Units, and the  fractional undivided interest  represented by each  Unit in  the
balance will be increased, although the interest in the Trust assets represented
by  each Unit will remain unchanged. If additional Units are issued by the Trust
(through deposit by the Sponsor of Additional Securities in connection with  the
issuance  of Additional  Units), the aggregate  Securities in the  Trust will be
increased by amounts allocable to Additional Units, and the fractional undivided
interest represented by each Unit in the balance will be decreased, although the
interest in the  Trust assets represented  by each Unit  will remain  unchanged.
Units  will remain outstanding until redeemed upon  tender to the Trustee by any
Unit Holder (which  may include  the Sponsor) or  until the  termination of  the
Trust  itself (see: "Redemption" and "Amendment and Termination of the Indenture
-- Termination").

ESTIMATED ANNUAL INCOME, ESTIMATED CURRENT RETURN AND ESTIMATED LONG-TERM RETURN

    On the initial Date  of Deposit, the estimated  net annual income per  1,000
Units  was estimated  to be  the amount  set forth  under "Summary  of Essential
Information". This  figure  is  computed  by dividing  the  total  gross  annual
interest  income expected  to be received  by the  Trust by the  number of Units
outstanding on  such  date, less  estimated  annual  fees and  expenses  of  the
Trustee,  the Sponsor and the Evaluator,  multiplied by 1,000 Units. Thereafter,
the net annual income  per 1,000 Units will  change whenever Securities  mature,
are  redeemed,  or  are sold,  or  as  substitute or  additional  Securities are
deposited into the Trust, or  as the expenses of the  Trust change. The fees  of
the Trustee, Sponsor and the Evaluator are subject to change without the consent
of Unit Holders to the extent provided under "Expenses and Charges".

    The  Estimated Current  Return is calculated  by dividing  the Estimated Net
Annual Income per Unit by the Public Offering Price per Unit. The Estimated  Net
Annual  Income  per Unit  will vary  with changes  in fees  and expenses  of the
Trustee and  the  Evaluator  and  with  the  principal  prepayment,  redemption,
maturity,  exchange or sale  of Securities while the  Public Offering Price will
vary with changes in the offering price of the underlying Securities; therefore,
there is no  assurance that the  present Estimated Current  Return indicated  in
Part  A will be  realized in the  future. The Estimated  Long-Term Return on the
Date of Deposit is set forth under "Summary of Essential Information". Estimated
Long-Term Return is  a measure of  the estimated return  to the investor  earned
over  the estimated life of the Trust. The Estimated Long-Term Return represents
an average of  the yields to  estimated average  life of the  Securities in  the
Portfolio   and  is  adjusted  to  reflect   expenses  and  sales  charges.  The

                                       3
<PAGE>
Estimated Long-Term Return  figure is calculated  by the Sponsor  in the  manner
discussed  below, using  an estimated average  life for each  of the Securities.
Estimated average life is  an essential factor in  the calculation of  Estimated
Long-Term  Return. When the Trust has a  shorter average life than is estimated,
Estimated Long-Term  Return will  be  higher if  the Trust  contains  securities
priced  at  a discount  and lower  if the  securities are  priced at  a premium.
Conversely, if the Trust has a longer average life than is estimated,  Estimated
Long-Term  Return will be lower when the securities are priced at a discount and
higher if  the securities  are priced  at a  premium. In  calculating  Estimated
Long-Term  Return, the average  yield for the Portfolio  is derived by weighting
each Security's yield (which takes into account the amortization of premiums and
the accretion of  discounts) by  the market  value of  the Security  and by  the
amount  of  time  remaining to  the  estimated  average life.  Once  the average
Portfolio yield is computed, this figure is then adjusted for estimated expenses
and the effect  of the  maximum sales charge  paid by  investors. The  Estimated
Current Return and Estimated Long-Term Return are expected to differ because the
calculation  of the Estimated  Long-Term Return reflects  the estimated date and
amount of principal  returned while  the Estimated  Current Return  calculations
include only Net Annual Interest Income and Public Offering Price as of the Date
of Deposit. The Estimated Current Return and the Estimated Long-Term Return will
be higher for those Unit Holders paying a reduced sales charge.

                            TAX STATUS OF THE TRUST

    In  the opinion of Messrs. Cahill Gordon  & Reindel, special counsel for the
Sponsor, under existing law:

        The Trust is  not an  association taxable  as a  corporation for  United
    States  Federal income tax purposes and income  of the Trust will be treated
    as income of  the Unit  Holders in  the manner  set forth  below. Each  Unit
    Holder  will be considered the owner of a  pro rata portion of each asset of
    the Trust under the grantor trust rules of Sections 671-678 of the  Internal
    Revenue Code of 1986, as amended (the "Code").

        Each  Unit Holder will be considered to have received his pro rata share
    of interest derived from each Trust asset when such interest is received  by
    the Trust. Each Unit Holder will be required to include in his gross income,
    as  determined for Federal income tax purposes, original issue discount with
    respect to his interest in a Security held by the Trust at the same time and
    in the same manner as though the  Unit Holder were the direct owner of  such
    interest.  Each Unit  Holder's pro  rata share of  each expense  paid by the
    Trust is deductible  by the Unit  Holder to  the same extent  as though  the
    expense had been paid directly by him.

        Each  Unit Holder will have a taxable  event when a Security is disposed
    of (whether by sale, exchange, redemption,  or payment at maturity) or  when
    the  Unit Holder redeems or sells his Units. The total tax cost of each Unit
    to a Unit Holder must be allocated among the cash and Securities held in the
    Trust in accordance with  their relative fair market  value on the date  the
    Unit Holder purchases his Units in order to determine his per Unit tax basis
    for  the Securities represented thereby. If a  Unit Holder's tax cost of his
    pro rata interest  in a Security  exceeds the amount  payable in respect  of
    such  pro rata interest upon the maturity  of the Security, such excess is a
    "bond premium"  which  may be  amortized  by the  Unit  Holder at  the  Unit
    Holder's election as provided in Section 171 of the Code.

    The  tax basis of a  Unit Holder with respect to  his interest in a Security
will be increased  by the  amount of  original issue  discount thereon  properly
included  in the Unit Holder's gross income as determined for Federal income tax
purposes.

   
    The amount  of gain  recognized  by a  Unit Holder  on  a disposition  of  a
Security by the Trust will be equal to the difference between such Unit Holder's
pro  rata portion of the gross proceeds realized by the Trust on the disposition
and the Unit Holder's  tax cost basis  in his pro rata  portion of the  Security
disposed  of. Any gain recognized  on a sale or exchange  of a Unit Holder's pro
rata interest  in a  Security, and  not constituting  a realization  of  accrued
"market  discount" and any  loss will be a  capital gain or  loss, except in the
case of a dealer or financial  institution. Gain realized on the disposition  of
the  interest  of a  Unit Holder  in a  market discount  Security is  treated as
ordinary income  to the  extent the  gain  does not  exceed the  accrued  market
discount.  A Unit Holder has an interest in a market discount Security in a case
in which the Unit Holder's tax cost for his pro rata interest in the Security is
less than the stated  redemption price thereof at  maturity (or the issue  price
plus  original issue discount accrued up to the acquisition date, in the case of
an original issue discount Security). If the market discount is less than 1/4 of
1% of the stated redemption price of the Security at maturity multiplied by  the
number of complete years to maturity, the market discount shall be considered to
be  zero.  Any capital  gain  or loss  arising from  the  disposition of  a Unit
Holder's pro rata interest  in a Security  will be a  long-term capital gain  or
loss  if the Unit Holder has held his  Units and the Trust has held the Security
for more than one year.  Under the Code, net capital  gain (i.e., the excess  of
net  long-term capital  gain over net  short-term capital  loss) of individuals,
estates and trusts is  subject to a  maximum nominal tax rate  of 28%. Such  net
capital  gain  may, however,  result in  a  disallowance of  itemized deductions
and/or affect a personal exemption phase-out.
    

    If the Unit Holder sells or redeems a Unit for cash, he is deemed thereby to
have disposed of his entire pro rata interest in all Trust assets represented by
the Unit and will have a taxable gain or loss measured by the difference between
his per Unit  tax basis  for such  assets, as  described above,  and the  amount
realized.

    Under  the personal income tax  laws of the State and  City of New York, the
income of the Trust will be treated as the income of the Unit Holders.

    The Trust may contain one or more Securities which were originally issued at
a discount ("original issue discount"). In general, original issue discount  can
be  defined as the difference  between the price at  which a Security was issued
and its stated redemption price at maturity. In

                                       4
<PAGE>
the case of a  Security issued after  July 1, 1982,  original issue discount  is
deemed to accrue on a constant interest method which corresponds, in general, to
the  economic accrual of  interest (adjusted to  eliminate proportionately on an
elapsed-time basis any excess of the amount  paid for the Security over the  sum
of  the issue price and  the accrued original issue  discount on the acquisition
date). The tax  basis in the  Security is  increased by the  amount of  original
issue  discount  that  is deemed  to  accrue  while the  Security  is  held. The
difference between the  amount realized  on a  disposition of  the Security  (ex
currently accrued interest) and the adjusted tax basis of the Security will give
rise  to taxable gain or  deductible loss upon a  disposition of the Security by
the Trust (or a sale or redemption of Units by a Unit Holder).

    An individual Unit Holder  who is neither  a citizen nor  a resident of  the
United  States and a corporate  Unit Holder other than  a United States domestic
corporation (a "foreign Unit  Holder") will not generally  be subject to  United
States  Federal income tax, including withholding taxes,  on his, her or its pro
rata share of interest  and original issue  discount on a  Security or any  gain
from  the sale or  other disposition of his,  her or its pro  rata interest in a
Security held in  the Trust, which  interest or original  issue discount is  not
effectively  connected with the conduct by the foreign Unit Holder of a trade or
business within the United States and which gain is either (i) not from  sources
within the United States or (ii) not so effectively connected, provided that:

        (a) with respect to U.S. source interest and original issue discount (i)
    the  Security is in registered form and was issued after July 18, 1984, (ii)
    the foreign Unit Holder does not  own actually or constructively 10  percent
    or more of the total combined voting power of all classes of voting stock of
    Dean  Witter, Discover  & Co., and  (iii) the  foreign Unit Holder  is not a
    controlled foreign  corporation  related  (within  the  meaning  of  Section
    864(d)(4) of the Code) to Dean Witter, Discover & Co.;

        (b)  with  respect to  any U.S.-source  capital  gain, the  foreign Unit
    Holder (if an individual) is not present  in the United States for 183  days
    or more during his or her taxable year in which the gain was realized and so
    certifies; and

        (c)  the  foreign  Unit  Holder  provides  the  required  certifications
    regarding (i)  his, her  or its  status,  (ii) in  the case  of  U.S.-source
    income,  the fact that the interest, original  issue discount or gain is not
    effectively connected with the conduct by the foreign Unit Holder of a trade
    or business  within  the  United  States, and  (iii)  if  determined  to  be
    required,  the 10 percent stock ownership and controlled foreign corporation
    matters mentioned in clauses (a)(ii) and (iii) above.

    Foreign Unit Holders should  consult their own tax  counsel with respect  to
United States tax consequences of ownership of Units.

    Each Unit Holder (other than a foreign Unit Holder who has properly provided
the  certifications described in  the preceding paragraph)  will be requested to
provide the Unit Holder's taxpayer identification  number to the Trustee and  to
certify  that the Unit  Holder has not  been notified that  payments to the Unit
Holder are subject to back-up withholding. If the taxpayer identification number
and an appropriate certification  are not provided  when requested, 31%  back-up
withholding will apply.

    The  foregoing discussion relates only to  United States Federal and, to the
extent stated, New York State and City income taxes.

    Investors should consult their tax counsel for advice with respect to  their
own particular tax situations.

                                    *  *  *

    After  the end of each calendar year,  the Trustee will furnish to each Unit
Holder an  annual  statement containing  information  relating to  the  interest
received  by the  Trust on  the Securities, the  gross proceeds  received by the
Trust from the disposition of any Security (resulting from redemption or payment
at maturity of any Security or the sale by the Trust of any Security ), and  the
fees  and expenses  paid by  the Trust. The  Trustee will  also furnish required
annual information  returns to  each Unit  Holder and  to the  Internal  Revenue
Service.

    The  Sponsor believes  that Unit Holders  who are individuals  should not be
subject to state personal income taxes on the interest (including original issue
discount)  received  through  the   Trust.  However,  Unit  Holders   (including
individuals)  may be subject to  state and local taxes  on any capital gains (or
market discount treated as ordinary income) derived from the Trust and to  other
state  and local taxes (including corporate income and franchise taxes, personal
property or intangibles taxes and estate  or inheritance taxes) on the Units  or
the  income derived  therefrom. In  addition, individual  Unit Holders  (and all
other Unit Holders which are not subject  to state income taxes with respect  to
the  interest  derived  from the  Trust)  will  probably not  be  entitled  to a
deduction for state tax purposes for their  share of the fees and expenses  paid
by  the Trust or for any interest  on indebtedness incurred to purchase or carry
their Units. Even though  the Sponsor believes  that interest income  (including
original  issue discount) received  through Trust is  exempt from state personal
income taxes on individuals  in most states, Unit  Holders should consult  their
own tax advisers with respect to state and local taxation matters.

                                RETIREMENT PLANS

    Trust Units may be suited for purchase by Individual Retirement Accounts and
pension,   profit-sharing  and  other   qualified  retirement  plans.  Investors
considering participation in any such plan  should review specific tax laws  and
pending  legislation related thereto  and should consult  their attorneys or tax
advisers with respect to the establishment and maintenance of any such plan.

                                       5
<PAGE>
                            PUBLIC OFFERING OF UNITS

PUBLIC OFFERING PRICE

    The Public Offering  Price of Units  during the initial  offering period  is
computed  by adding to the aggregate offering price, and thereafter by adding to
the aggregate  bid price,  of the  Securities in  the Trust,  any money  in  the
Interest  and Principal Accounts other than money  held to make payments to Unit
Holders on a monthly Distribution Date and amounts representing taxes, fees  and
expenses  of the Trust and money required  to redeem tendered Units, by dividing
such sum by the  number of Units  outstanding and then  adding the sales  charge
shown  in "Summary of  Essential Information". For  purchases settling after the
first settlement date (including  purchases of Units  created after the  initial
date  of deposit) a proportionate share of accrued and undistributed interest on
the Securities from such date to the settlement date for the Units purchased  is
also  added  to  the  Public Offering  Price.  (See:  "Estimated  Annual Income,
Estimated Current Return and  Estimated Long-Term Return  Per 1,000 Units".)  In
addition, amounts necessary to be collected by the Trustee to permit the Trustee
to  make equal  distributions to all  Unit Holders  will be added  to the Public
Offering Price upon the  initial sale of Additional  Units. The Public  Offering
Price  on the  date of this  Prospectus or on  any subsequent date  will vary in
accordance with fluctuations in the  evaluation of the underlying Securities  in
the Trust.

    During  the  initial public  offering period  and thereafter,  the aggregate
offering or bid prices of the Securities in the Trust, as is appropriate,  shall
be  determined  for the  Trust by  the Evaluator.  Following the  initial public
offering period, evaluations made for purposes of secondary market  transactions
by  the Sponsor will be made on the bid  side of the market on each business day
as of the  Evaluation Time, effective  for all sales  made during the  preceding
24-hour period. Evaluations, for purposes of redemptions by the Trustee, will be
made  each business day as of the Evaluation Time, effective for all redemptions
made subsequent to the last preceding determination.

    In addition to the Public Offering Price,  the price of a Unit includes  the
Unit's  share  of accrued  interest on  the Securities.  Because of  the varying
interest payment dates of the Securities, accrued interest on the Securities  at
any  point in time will be greater than the amount of interest actually received
by the Trust  and distributed to  Unit Holders. Therefore,  the Unit's share  of
accrued  interest is always  added to the value  of the Units.  If a Unit Holder
sells all or a portion of his Units, he is entitled to receive his proportionate
share of the accrued interest on the Securities from the purchaser of his Units.
Similarly, if  a  Unit  Holder redeems  all  or  a portion  of  his  Units,  the
Redemption Price per Unit will include accrued interest on the Securities.

    On  the Date of Deposit, the Public Offering Price per 1,000 Units (based on
the offering  side evaluation  of  the Securities  in  the Trust)  exceeded  the
Sponsor's  Repurchase Price per  1,000 Units and the  Redemption Price per 1,000
Units (based upon the bid side evaluation of the Securities in the Trust) by the
amounts set forth in "Summary of Essential Information".

PUBLIC DISTRIBUTION

    During the  initial public  offering  period (i)  for  Units issued  on  the
initial  Date of Deposit and (ii) for Additional Units issued after such date in
respect of additional deposits of Securities,  Units will be distributed to  the
public  by  the  Sponsor  and  through dealers  at  the  Public  Offering Price,
calculated on each business  day, plus accrued interest  on the Securities.  The
initial public offering period in each case is 30 days unless all Units are sold
prior  thereto whereupon the initial public  offering period will terminate. The
initial public offering period may be extended  by the Sponsor as long as  Units
remain  unsold. Upon  the termination of  the initial public  offering period in
each case, unsold Units or Units acquired by the Sponsor in the secondary market
referred to below may be  offered to the public by  this Prospectus at the  then
current  Public Offering  Price calculated  daily plus  accrued interest  on the
Securities. The  Sponsor intends  to qualify  Units in  states selected  by  the
Sponsor  for sale  by the  Sponsor and  through dealers  who are  members of the
National Association of Securities Dealers, Inc.

SECONDARY MARKET

    While not  obligated to  do so,  it is  the Sponsor's  present intention  to
maintain,  at its expense,  a secondary market  for Units of  this series of the
Dean Witter  Select Government  Trust and  to continuously  offer to  repurchase
Units  for  Unit Holders  at the  applicable  Sponsor's Repurchase  Price. (See:
"Summary of Essential Information".) The Sponsor's Repurchase Price is  computed
by adding to the aggregate of the bid prices of the Securities in the Trust, any
money  in the  Interest and  Principal Accounts  other than  money held  to make
payments to Unit Holders  on a monthly Distribution  Date and money required  to
redeem  tendered  Units,  plus  accrued interest  on  the  Securities, deducting
therefrom expenses of the Trustee, Sponsor, Evaluator and counsel, and taxes, if
any, and then dividing the resulting sum by the number of Units outstanding,  as
of  the date of such computation. There is  no refund of the sales charge nor is
there any additional sales charge incurred, when a Unit Holder sells Units  back
to the Sponsor. Any Units repurchased by the Sponsor at the Sponsor's Repurchase
Price  may be reoffered to the public by  the Sponsor at the then current Public
Offering Price, plus  accrued interest. Any  profit or loss  resulting from  the
resale of such Units will belong to the Sponsor.

    If  the supply of Units  exceeds demand (or for  any other business reason),
the Sponsor may, at any time,  occasionally, from time to time, or  permanently,
discontinue  the repurchase of Units of  this series at the Sponsor's Repurchase
Price. In such event, although under no obligation to do so, the Sponsor may, as
a service to Unit Holders, offer to repurchase Units at the Redemption Price,  a
price based on the current bid prices for the Securities, plus accrued interest.
Alternatively,  Unit Holders  may redeem  their Units  through the  Trustee. The
Redemption Price  per Unit  is computed  in  the same  manner as  the  Sponsor's
Repurchase Price, and is based on the bid side evaluation of the Securities, not
the offering side evaluation. There is no refund of the sales charge, nor is any
additional sales charge incurred, when a Unit

                                       6
<PAGE>
Holder  redeems Units. If the Sponsor  repurchases Units in the secondary market
at the Redemption Price, it may reoffer  these Units in the secondary market  at
the  Public Offering Price or  the Sponsor may tender  Units so purchased to the
Trustee for redemption. In no  event will the price  offered by the Sponsor  for
the  repurchase of  Units be  less than  the current  Redemption Price  of those
Units. (See: "Redemption".)

PROFIT OF SPONSOR

    The Sponsor receives  a sales  charge on  Units sold  to the  public and  to
dealers.  The Sponsor may have also realized a book profit (or sustained a loss)
on the  deposit of  the  Securities in  the  Trust representing  the  difference
between the cost of the Securities to the Sponsor and the cost of the Securities
to  the Trust (for a description of such profit (or loss) and the amount of such
difference see "Summary of Essential Information"). In addition, the Sponsor may
receive placement fees or may realize profits or sustain losses with respect  to
Securities  acquired  from underwriting  syndicates of  which  the Sponsor  is a
member. During the initial public offering  period and thereafter to the  extent
Additional  Units continue to be issued and  offered for sale to the public, the
Sponsor may  realize  additional  profit  (or  sustain  a  loss)  due  to  daily
fluctuations  in the offering prices of the  Securities in the Trust and thus in
the Public  Offering Price  of Units  received  by the  Sponsor. Cash,  if  any,
received  by the Sponsor from the Unit  Holders prior to the settlement date for
purchase of Units or prior to the payment for Securities upon their delivery may
be used  in  the  Sponsor's  business to  the  extent  permitted  by  applicable
regulations and may be of benefit to the Sponsor.

    The Sponsor may also realize profits (or sustain losses) while maintaining a
secondary  market in  the Units,  in the  amount of  any difference  between the
prices at which the Sponsor buys Units (based on the bid side of the  Securities
in  the Trust)  and the  prices at  which the  Sponsor resells  such Units (such
prices include a sales charge) or the  prices at which the Sponsor redeems  such
Units  (based on the bid side  of the Securities in the  Trust), as the case may
be.

VOLUME DISCOUNT

    Although under no obligation to do so, the Sponsor intends to permit  volume
purchasers of Units to purchase Units at a reduced sales charge. The Sponsor may
at  any time  change the  amount by which  the sales  charge is  reduced, or may
discontinue the  discount  altogether. This  discount  in the  sales  charge  is
available  to volume purchasers of Units due  to the realization of economies of
scale in sales effort and sales related expenses relating to volume purchases.

    The sales charge will be reduced  pursuant to the following graduated  scale
for sales to any person of at least $250,000:

<TABLE>
<CAPTION>
                                                                  SALES CHARGE
                             --------------------------------------------------------------------------------------
                                              INITIAL                                    SECONDARY
                             ------------------------------------------  ------------------------------------------
                                  PERCENT OF            PERCENT OF            PERCENT OF            PERCENT OF
                             PUBLIC OFFERING PRICE  NET AMOUNT INVESTED  PUBLIC OFFERING PRICE  NET AMOUNT INVESTED
                             ---------------------  -------------------  ---------------------  -------------------
<S>                          <C>                    <C>                  <C>                    <C>
Less than $250,000.........            1.50%                1.523%                 1.75%                1.781%
$250,000 to $499,999.......            1.25%                1.266%                 1.50%                1.523%
$500,000 or more...........            1.00%                1.010%                 1.25%                1.266%
</TABLE>

    The  reduced sales  charges as shown  on the  chart above will  apply to all
purchases of  Units of  this Trust  only  on any  one day  by the  same  person,
partnership or corporation (other than a dealer) in the amounts stated herein.

    Units  held  in the  name of  the purchaser's  spouse  or in  the name  of a
purchaser's child under the age of 21  are deemed for the purposes hereof to  be
registered  in the  name of  the purchaser. The  reduced sales  charges are also
applicable  to  a  trustee  or  other  fiduciary,  including  a  partnership  or
corporation,  purchasing Units  for a  single trust  estate or  single fiduciary
account.

    Sales to  dealers will  be made  at  prices which  include a  concession  as
follows:

<TABLE>
<CAPTION>
          PRIMARY MARKET                      SECONDARY MARKET
-----------------------------------  -----------------------------------
 SALES CHARGE    DEALER CONCESSION    SALES CHARGE    DEALER CONCESSION
---------------  ------------------  ---------------  ------------------
<S>              <C>                 <C>              <C>
       1.50%             1.05 %             1.75%             1.22 %
       1.25               .875              1.50              1.05
       1.00               .70               1.25               .875
</TABLE>

    Dealers  purchasing certain dollar  amounts of Units during  the life of the
Trust will be entitled to additional concession benefits. The dealer  concession
for  secondary market  sales may  differ from the  concessions set  forth in the
above schedule. The Sponsor reserves the right, at any time, to change the level
of dealer concessions.

                              REINVESTMENT PROGRAM

    Distributions of  interest,  if  any,  are made  to  Unit  Holders  monthly.
Distributions of principal will be made annually beginning in the year mentioned
previously  in this prospectus and may be more frequent. The Unit Holder has the
option, however, of either receiving  his distributions of income and  principal
from  the Trustee  or participating in  the reinvestment program  offered by the
Sponsor, the Dean Witter  U.S. Government Money Market  Trust (the "Fund").  The
Fund  is composed  primarily of  high-yielding short-term  government securities
that  are  managed  by  the  InterCapital  Division  of  the  Sponsor.  Dividend
distributions  from the Fund  to foreign investors will  generally be subject to
U.S.

                                       7
<PAGE>
withholding taxes. Participation in the  reinvestment program is conditioned  on
such  program's lawful  qualification for  sale in the  state in  which the Unit
Holder is a  resident. For more  information concerning this  program, the  Unit
Holder  should  fill out  and  mail in  the attached  card  to the  Trustee. The
appropriate prospectus will be sent to the Unit Holder. A Unit Holder's election
to participate  in the  reinvestment program  will apply  to all  Units of  this
series  of the Trust owned by such Unit  Holder. The Unit Holder should read the
prospectus  for   the  reinvestment   program  carefully   before  deciding   to
participate.  Once a Reinvestment  Election has been chosen  by the Unit Holder,
such election shall remain in effect until changed by the Unit Holder.

    Any Unit Holder may, by filing with the Trustee a written notice of election
at least ten days before the Record Date for the first distribution to which  it
is  to apply,  elect to  have distributions of  principal and  interest, if any,
reinvested in the Dean Witter U.S.  Government Money Market Trust. Unit  Holders
participating  in Individual Retirement Accounts and pension, profit-sharing and
other qualified retirement plans, should consult their plan custodian as to  the
appropriate  disposition of distributions. Elections  may be modified or revoked
upon similar notice.

                                   REDEMPTION

RIGHT OF REDEMPTION

    Units represented by a Certificate may be redeemed at the Redemption  Price,
computed  as set forth below, upon tender  of such Certificate to the Trustee at
its unit investment trust office in the  City of New York, properly endorsed  or
accompanied  by a  written instrument  of transfer  in form  satisfactory to the
Trustee, as set forth in the Certificate, and executed by the Unit Holder or its
authorized attorney. A Unit  Holder may tender his  Units for redemption at  any
time after the settlement date for purchase, whether or not such Unit Holder has
received  a definitive Certificate. The Redemption  Price per Unit is calculated
by adding to  the current bid  prices for the  Securities in the  Trust (1)  any
money  in the Principal Account and  Interest Account, other than money required
to redeem tendered  Units, (2)  a proportionate  share of  accrued interest  and
undistributed  interest income on  the Securities not  subject to collection and
distribution, determined  to the  day of  tender plus  a sum  equivalent to  the
amount  of accrued interest which  would have been payable  with respect to such
tendered Units as of the date of computation deducting therefrom expenses of the
Trustee, the Sponsor, the Evaluator and counsel and taxes, if any, and  dividing
the  resulting sum  by the number  of Units outstanding  as of the  date of such
computation. There is no sales charge incurred when a Unit Holder tenders  Units
to  the  Trustee for  redemption. The  Unit  Holder is  entitled to  receive the
Redemption Price on  the seventh  calendar day  following tender.  The "date  of
tender" is deemed to be the date on which the Units are received by the Trustee,
except as regards Units received after the Evaluation Time stated under "Summary
of  Essential Information",  the date of  tender is  the next day  on which such
Exchange is open for trading and such Units will be deemed to have been tendered
to the Trustee on such  day for redemption at  the Redemption Price computed  on
that day.

    Any  amounts  to  be  paid  on  redemption  representing  interest  shall be
withdrawn from the Interest Account to the extent funds are available or, if the
balance therein is insufficient, from  the Principal Account. All other  amounts
paid on redemption shall be withdrawn from the Principal Account. The Trustee is
authorized  by the Indenture  to sell Securities  in order to  provide funds for
redemption. To the  extent Securities  are sold,  the size  of a  Trust will  be
reduced.  The  Trustee will  attempt  to maintain  the  proportions of  types of
Securities in  the  Trust  if  required to  sell  Securities  pursuant  to  this
provision.  Such  sales may  be required  at  a time  when Securities  would not
otherwise be  sold and  might result  in lower  prices than  might otherwise  be
realized.  Moreover, due to the minimum principal amount in which Securities may
be required  to be  sold,  the proceeds  of such  sales  may exceed  the  amount
necessary   for  payment  of  Units  redeemed.  Such  excess  proceeds  will  be
distributed pro  rata  to all  remaining  Unit  Holders of  record  unless  such
proceeds are used to purchase Additional Securities.

    The  Securities  to be  sold  for purposes  of  redeeming Units  will  be in
proportion to the different types of Securities in the Trust. Provision is  made
under  the Indenture for  the Sponsor to  specify minimum face  amounts in which
blocks of Securities are to  be sold in order to  obtain the best price for  the
Trust.

COMPUTATION OF REDEMPTION PRICE

    The  value of the Trust is determined as of the Evaluation Time stated under
"Summary of Essential Information" and (a) semiannually, on June 30 and December
31 of each  year (or the  last Business Day  prior thereto), (b)  on the day  on
which  any Unit  is tendered for  redemption and  (c) on any  other Business Day
desired by the Trustee or requested by the Sponsor.

        (1) by adding: the  aggregate bid side evaluation  of Securities in  the
    Trust,  as determined by the Evaluator; cash  on hand in the Trust or moneys
    in the process  of being collected  from matured interest  coupons or  bonds
    prepaid,  matured or  called for redemption,  other than  money deposited to
    purchase Contract Obligations or money credited to the Reserve Account;  and
    accrued  but unpaid interest on  the Securities at the  close of business on
    the date of such Evaluation; and then,

        (2) by deducting  from the  resulting figure:  amounts representing  any
    applicable  taxes or governmental  charges payable out of  the Trust for the
    purpose of making  an addition  to the reserve  account (as  defined in  the
    Indenture,  the "Reserve Account"), amounts representing accrued expenses of
    the Trust (including, but not  limited to, amounts representing unpaid  fees
    of the Trustee, the Sponsor, bond counsel and the Evaluator) and monies held
    for  distribution  to Unit  Holders  of record  as of  a  date prior  to the
    evaluation being made on the days or dates set forth above; and then,

                                       8
<PAGE>
        (3) by dividing the result of the above computation by the total  number
    of  Units outstanding on the date of evaluation. The resulting figure equals
    the Redemption Price per Unit.

POSTPONEMENT OF REDEMPTION

    The right of redemption may be suspended and payment of the Redemption Price
per Unit postponed for more than seven calendar days following a tender of Units
for redemption for any period during which the New York Stock Exchange, Inc.  is
closed,  other than for customary weekend  and holiday closings, or during which
trading on that Exchange  is restricted or  an emergency exists  as a result  of
which disposal or evaluation of the Securities is not reasonably practicable, or
for  such other periods as  the Securities and Exchange  Commission may by order
permit. The Trustee is not liable  to any person or in  any way for any loss  or
damage that may result from any such suspension or postponement.

                             RIGHTS OF UNIT HOLDERS

UNIT HOLDERS

    A  Unit Holder  is deemed to  be a beneficiary  of the Trust  created by the
Indenture and vested  with all right,  title and interest  in the Trust  created
therein.  A Unit Holder may at any time  tender a Certificate to the Trustee for
redemption. Ownership  of  Units  is evidenced  by  registered  Certificates  of
Beneficial Interest issued in denominations of one or more Units and executed by
the   Trustee  and   the  Sponsor.   These  Certificates   are  transferable  or
interchangeable upon presentation  at the  unit investment trust  office of  the
Trustee,   properly  endorsed  or  accompanied  by  an  instrument  of  transfer
satisfactory to the Trustee  and executed by the  Unit Holder or its  authorized
attorney,  together with the  payment of $2.00,  if required by  the Trustee, or
such other  amount as  may be  determined by  the Trustee  and approved  by  the
Sponsor,  and any other tax or governmental  charge imposed upon the transfer of
Certificates. The Trustee will replace any mutilated, lost, stolen or  destroyed
Certificate  upon proper  identification, satisfactory indemnity  and payment of
charges incurred. Any  mutilated Certificate  must be presented  to the  Trustee
before any substitute Certificate will be issued.

CERTAIN LIMITATIONS

    Consent  of  Unit Holders  is not  required except  with respect  to certain
amendments and terminations of  the Trust. (See:  "Amendment and Termination  of
the  Indenture".) Unit Holders shall  have no right to  control the operation or
administration of the Trust in  any manner, except upon the  vote of 51% of  the
Unit  Holders outstanding at any time  for purposes of amendment, or termination
of the Trust, all as  provided in the Indenture;  however, no Unit Holder  shall
ever  be under  any liability  to any third  party for  any action  taken by the
Trustee, the Evaluator or the Sponsor.

    The death or incapacity of any Unit Holder will not operate to terminate the
Trust or entitle the legal representatives or heirs of such Unit Holder to claim
an accounting or  to take  any other  action or proceeding  in any  court for  a
partition or winding up of the Trust.

                              EXPENSES AND CHARGES

INITIAL EXPENSES

    All  expenses and charges incurred  prior to or in  the establishment of the
Trust,  including  the  initial  preparation,  printing  and  execution  of  the
Indenture and the Certificates, the initial fees of the Evaluator, initial legal
and  auditing  expenses,  the  cost  of the  preparation  and  printing  of this
Prospectus and all other advertising and selling expenses, have been or will be,
paid by the Sponsor or the Trustee and not the Trust.

FEES

    The Sponsor's  fee is  set forth  in "Summary  of Essential  Information  --
Sponsor's  Annual Supervision Fee."  Such fee, which is  calculated on an annual
basis, is earned for Portfolio supervisory services and is paid monthly.

    For its  services  as Trustee  under  the Indenture,  the  Trustee  receives
annually the amount set forth under "Summary of Essential Information," computed
on  the basis of the largest principal amount  of Securities in the Trust at any
time during the  period with  respect to which  such compensation  is made.  The
Trustee  also receives benefits to the extent  that it holds funds on deposit in
various non-interest bearing accounts created under the Indenture.

    For each evaluation  of the  Securities in  the Trust,  the Evaluator  shall
receive  against a statement submitted  to the Trustee a  fee as set forth under
"Summary of Essential Information."

    The Sponsor's fee, Trustee's fees and the Evaluator's fees are payable as of
each Record Date from  the Interest Account, to  the extent funds are  available
and  thereafter from the  Principal Account. Any  of such fees  may be increased
without approval  of  the Unit  Holders  in accordance  with  the terms  of  the
Indenture.

                                       9
<PAGE>
OTHER CHARGES

    The  following additional charges  are or may  be incurred by  the Trust, as
more fully described in the Indenture: (a) fees of the Trustee for extraordinary
services, (b) expenses of  the Trustee (including  legal and auditing  expenses)
and  of counsel designated by the Sponsor, (c) various governmental charges, (d)
expenses and costs of any action taken  by the Trustee to protect the Trust  and
the rights and interests of the Unit Holders, (e) indemnification of the Trustee
for  any loss, liability or expenses incurred by it in the administration of the
Trust without gross negligence, bad faith  or willful misconduct on its part  or
reckless  disregard of  its obligations and  duties, (f)  indemnification of the
Sponsor for any losses, liabilities and  expenses incurred in acting as  Sponsor
or  Depositor under the Indenture without gross negligence, bad faith or willful
misconduct or reckless disregard of its obligations and duties, (g) expenditures
incurred in contacting Unit Holders upon termination of the Trust and (h) to the
extent then lawful, expenses (including  legal, auditing and printing  expenses)
of maintaining registration or qualification of the Units and/or the Trust under
Federal  or state securities laws so long as the Sponsor is maintaining a market
for the Units. The  accounts of the  Trust will be  audited not less  frequently
than  annually by  independent public accountants  selected by  the Sponsor. The
cost of such audits will be an expense of the Trust.

    The fees and expenses set forth herein are payable out of the Trust and when
so paid by or owing to  the Trustee are secured by a  lien on the Trust. If  the
balances  in the Interest and Principal Accounts are insufficient to provide for
amounts payable by the Trust,  the Trustee has the  power to sell Securities  to
pay  such amounts. To the extent Securities are sold, the size of the Trust will
be reduced and  the proportions  of the types  of Securities  will change.  Such
sales  might be required at  a time when Securities  would not otherwise be sold
and might result in lower prices than might otherwise be realized. Moreover, due
to the minimum principal amount in which Securities may be required to be  sold,
the  proceeds of such sales  may exceed the amount  necessary for the payment of
such fees and expenses.

                          ADMINISTRATION OF THE TRUST

RECORDS AND ACCOUNTS

    The Trustee will keep records and accounts of all transactions of the  Trust
at  its unit investment trust  office at 101 Barclay  Street, New York, New York
10286. These records and accounts and an executed copy of the Indenture will  be
available  for  inspection by  Unit Holders  at  reasonable times  during normal
business hours. The  Trustee will additionally  keep on file  for inspection  by
Unit  Holders a current list of the  Securities held in the Trust. In connection
with the storage and handling of certain Securities deposited in the Trust,  the
Trustee  is authorized  to use the  services of Depository  Trust Company. These
services would include safekeeping of the Securities, coupon-clipping,  computer
book-entry  transfer and  institutional delivery services.  The Depository Trust
Company is a limited  purpose trust company organized  under the Banking Law  of
the  State of New  York, a member of  the Federal Reserve  System and a clearing
agency registered under the Securities Exchange Act of 1934.

DISTRIBUTION

    The Trustee will collect  the interest on  the Securities (including  monies
representing   penalties  for  the  failure  to  make  timely  payments  on  the
Securities, liquidated damages for default or breach of any condition or term of
the Securities, and monies paid (if  any) pursuant to any contract of  insurance
representing  interest on the Securities) as it becomes payable, and credit such
interest to a  separate Interest Account  created by the  Indenture. All  monies
received  by the Trustee from sources other  than interest will be credited to a
separate Principal Account. All funds collected or received will be held by  the
Trustee  in trust without interest  to Unit Holders as part  of the Trust or the
Reserve Account (if  any) established  pursuant to  the Indenture  for taxes  or
charges  referred to herein,  until required to be  disbursed in accordance with
the provisions of the Indenture.

DISTRIBUTION FROM THE INTEREST AND PRINCIPAL ACCOUNT

    Interest and principal received by the  Trust, net of expenses and  charges,
will  be  distributed on  each Distribution  Date on  a pro  rata basis  to Unit
Holders of record as of the preceding Record Date. All distributions will be net
of applicable  expenses, funds  required for  the redemption  of Units  and,  if
applicable, reimbursements to the Trustee for interest payments advanced to Unit
Holders discussed below. (See: "Summary of Essential Information", "Expenses and
Changes" and "Redemption".)

    The Trustee will credit to the Interest Account all interest received by the
Trust,  including that part of the proceeds  of any disposition of securities of
the Trust which represents accrued interest. All other receipts will be credited
to the Principal Account. The pro rata share of the Interest Account and the pro
rata share of cash  in the Principal  Account represented by  each Unit will  be
computed  by the  Trustee each  month as  of the  Record Date.  (See "Summary of
Essential Information.") Proceeds received  from the disposition  of any of  the
Securities  subsequent  to  a  Record  Date and  prior  to  the  next succeeding
Distribution Date  will  be  held in  the  Principal  Account and  will  not  be
distributed  until  the following  Distribution Date.  The distribution  to Unit
Holders as of each Record Date will  be made on the following Distribution  Date
or  shortly thereafter  and shall  consist of  an amount  substantially equal to
one-twelfth of such Unit Holder's pro rata share of the estimated annual  income
to  the  Interest  Account  after  deducting  estimated  expenses  (the "Monthly
Interest Distribution")  plus such  Unit Holder's  pro rata  share of  the  cash
balance  in the Principal  Account computed as  of the close  of business on the
preceding Record Date. Persons  who purchase Units between  a Record Date and  a
Distribution   Date  will  receive  their   first  distribution  on  the  second
Distribution Date following their purchase of

                                       10
<PAGE>
Units. No distribution need  be made from the  Principal Account if the  balance
therein  is less  than an  amount sufficient to  distribute $.001  per Unit. The
Monthly Interest Distribution per  1,000 Units initially will  be in the  amount
shown under "Summary of Essential Information" and will change as the income and
expenses  of the Trust change and  as Securities are exchanged, redeemed, mature
or sold.

    Normally, interest payments on the Securities in the Portfolio of the  Trust
which  pay interest  are made  on a  semi-annual basis.  Therefore, it  may take
several months after the Date of  Deposit for the Trustee to receive  sufficient
interest  payments on the Securities to  begin monthly distributions of interest
to Unit Holders. Further, because interest payments on the Securities which  pay
interest  are not received by the Trust  at a constant rate throughout the year,
any Monthly Interest Distribution may be  more or less than the amount  credited
to  the  Interest Account  as  of a  Record Date.  In  order to  eliminate these
fluctuations, the  Trustee  is required  under  the Indenture  to  advance  such
amounts  as may be necessary to  provide Monthly Interest Distributions of equal
amounts. The Trustee will be reimbursed, without interest, for any such advances
from funds available in the Interest Account on the next pursuing Record Date or
Record Dates,  as  the  case  may  be. Funds  which  are  available  for  future
distributions,  payments of expenses  and redemptions are  in accounts which are
non-interest bearing to Unit Holders and  are available for use by the  Trustee,
pursuant  to normal banking procedures. In addition, because of varying interest
payment dates  of  the  Securities comprising  the  Trust's  Portfolio,  accrued
interest  at  any point  in time  will be  greater than  the amount  of interest
actually received by  the Trust  and distributed  to Unit  Holders. This  excess
accrued  but undistributed  interest amount  (the "accrued  interest carryover")
will be added to the value of the  Units on any purchase after the initial  Date
of  Deposit. If a Unit Holder sells or redeems  all or a portion of his Units, a
portion of his sale proceeds will be allocable to his proportionate share of the
accrued interest carryover. Similarly, if a Unit Holder redeems all or a portion
of his Units, the Redemption Price per Unit which he is entitled to receive from
the Trustee will also include his accrued interest carryover on the Securities.

    The Trust  has  been structured  so  that a  positive  cash balance  in  the
Interest  Account will be available  to pay the current  expenses and charges of
the Trust. Therefore, it is not anticipated  that the Trustee will have to  sell
Securities   to   pay  such   expenses.  The   Trustee,  when   making  interest
distributions, will  have  previously deducted  from  the Interest  Account  the
expenses  and  charges  mentioned  above,  and  thus  will  distribute  on  each
Distribution Date an amount which will be less than the interest accrued on  the
Securities to each Unit Holder on or immediately prior to such Distribution Date
by amounts equal to the current expenses and charges of the Trust.

    The  Trustee  has agreed  to  advance to  the  Trust the  amount  of accrued
interest due on  the Securities  in the  Portfolio from  their respective  issue
dates  or previous interest payment dates  through the first expected settlement
date. This accrued interest amount will be paid to the Sponsor as the holder  of
record  of all Units on such date. Consequently, when the Sponsor sells Units of
a Trust after the date of the  Prospectus, the amount of accrued interest to  be
added  to the Public Offering  Price of the Units  purchased by an investor will
include only accrued interest  from the first expected  settlement date to,  but
not  including, the date of settlement of the investor's purchase (normally five
business days after purchase), less any distributions from the Interest Account.
Since a person who  contracts to purchase  Units on the  date of the  Prospectus
will  settle such purchase  on the first  expected settlement date  of Units, no
accrued interest will be  added to the Public  Offering Price. The Trustee  will
recover  its advancements to  the Trust (without  interest or other  cost to the
Trust) from interest received on the Securities deposited in the Trust.

REPORTS TO UNIT HOLDERS

    With each distribution from the Interest Account or Principal Account of the
Trust, the Trustee will furnish to the  Unit Holders, a statement of the  amount
being distributed, expressed in each case as a dollar amount per 1,000 Units. In
the  event that the Issuer  of any of the Securities  fails to make payment when
due of any interest  or principal and  such failure results in  a change in  the
amount  which would  otherwise be  distributed as  a periodic  distribution, the
Trustee will, with the first such distribution following such failure, set forth
in an accompanying statement, the Issuer  and the Securities, the amount of  the
reduction  in  the  distribution  per  Unit  resulting  from  such  failure, the
percentage of  the  aggregate face  amount  of Securities  which  such  Security
represents  and,  to  the  extent  then  determined,  information  regarding any
disposition or legal action with respect  to such Security. Within a  reasonable
period  of time after the end of each  calendar year, but in no event later than
February 15, the Trustee will furnish to each person who at any time during such
calendar year was a Unit Holder of record a statement setting forth:

        As to  the Interest  Account: the  amount of  interest received  on  the
    Securities and amounts representing penalties for the failure to make timely
    payments  on  any of  the Securities  or liquidated  damages for  default or
    breach of any condition or terms of any of the Securities (or any instrument
    underlying any of the Securities); the amount paid from the Interest Account
    upon the redemption of Units; the amounts paid from the Interest Account for
    purchase of replacement Securities,  in the event that  the purchase of  any
    Securities  deposited in the Trust was  not consummated; the deductions from
    the Interest Account  for applicable  taxes, and  fees and  expenses of  the
    Sponsor,  the Trustee, the Evaluator and counsel; any other amounts credited
    to or deducted from the Interest Account; and the net amount remaining after
    such payments and deductions expressed both as a total dollar amount and  as
    a dollar amount per 1,000 Units outstanding on the last business day of such
    calendar year.

        As   to  the  Principal  Account:  the  dates  of  the  sale,  maturity,
    liquidation or redemption  of any  of the  Securities and  the net  proceeds
    received  therefrom and from the prepayment  of principal of the Securities,
    excluding any portion credited to the Interest Account; the amount paid from
    the Principal Account  representing Units which  were redeemed; the  amounts
    paid  from the Principal Account for  purchase of replacement Securities, in
    the event that the purchase of any  Security deposited in the Trust was  not
    consummated;  if  amounts in  the  Interest Account  were  insufficient, the
    deductions from the  Principal Account,  if any, for  payment of  applicable
    taxes, fees

                                       11
<PAGE>
    and  expenses of  the Sponsor,  the Trustee,  the Evaluator  and counsel; if
    amounts in the Interest Account  were insufficient, the deductions from  the
    Principal  Account for  any other amounts  credited to or  deducted from the
    Interest Account;  and the  net  amount remaining  after such  payments  and
    deductions  expressed both as a  total dollar amount and  as a dollar amount
    per 1,000 Units outstanding on the last business day of such calendar year.

        The following  information: a  list of  the Securities  as of  the  last
    business  day of such calendar year; the  number of Units outstanding on the
    last business day  of such  calendar year;  the Redemption  Price per  1,000
    Units based on the last Trust evaluation made during such calendar year; and
    the amounts actually distributed during such calendar year from the Interest
    and  Principal Accounts, separately  stated, expressed both  as total dollar
    amounts and as  dollar amounts  per 1,000  Units outstanding  on the  Record
    Dates for such distributions.

    In order to comply with tax reporting requirements, the Trustee will furnish
to  Unit Holders, upon  request, evaluations of the  Securities as determined by
the Evaluator. The accounts  of the Trust shall  be audited not less  frequently
than  annually  by independent  certified public  accountants designated  by the
Sponsor, and the report of such accountants will be furnished by the Trustee  to
Unit Holders upon request.

                                    SPONSOR

    Dean  Witter Reynolds Inc. ("Dean Witter")  is a corporation organized under
the laws of the  State of Delaware  and is a  principal operating subsidiary  of
Dean  Witter, Discover  & Co., a  publicly-traded corporation. Dean  Witter is a
financial services  company  that provides  to  its individual,  corporate,  and
institutional  clients services  as a  broker in  securities and  commodities, a
dealer in corporate, municipal, and government securities, an investment banker,
an investment adviser, and an  agent in the sale  of life insurance and  various
other  products and services. Dean Witter is a member firm of the New York Stock
Exchange, the American Stock Exchange, the Chicago Board Option Exchange,  other
major  securities exchanges and the  National Association of Securities Dealers,
and is a clearing member of the  Chicago Board of Trade, the Chicago  Mercantile
Exchange,  the Commodity Exchange  Inc., and other  major commodities exchanges.
Dean  Witter  is  currently   servicing  its  clients   through  a  network   of
approximately  375 domestic  and international offices  with approximately 7,500
account executives servicing individual and institutional client accounts.

LIMITATIONS ON LIABILITY

    The Sponsor is liable  for the performance of  its obligations arising  from
its responsibilities under the Indenture, but will be under no liability to Unit
Holders for taking any action or refraining from taking any action in good faith
or  for errors in judgment or liable  or responsible in any way for depreciation
or loss incurred by reason of the sale of any Securities, except in case of  its
own  willful misfeasance, bad faith, gross  negligence or reckless disregard for
its obligations and duties. (See: "Sponsor -- Responsibility.")

RESPONSIBILITY

    The Trust is not  a managed registered  investment company. Securities  will
not be sold by the Trustee to take advantage of ordinary market fluctuations.

    Although  the Sponsor and the Trustee do  not presently intend to dispose of
Securities, the Indenture permits the Sponsor  to direct the Trustee to  dispose
of  Securities in the Trust for purposes  of redeeming tendered Units and to pay
Trust expenses.

    Any remaining proceeds resulting from the disposition of any Security in the
Trust will be distributed  as set forth under  "Administration of the Trust"  to
the  extent such remaining proceeds are not  needed to redeem Units or pay Trust
expenses.

RESIGNATION

    If at any time the Sponsor shall resign under the Indenture or shall fail to
perform or be  incapable of  performing its  duties thereunder  or shall  become
bankrupt  or if its affairs are taken  over by public authorities, the Indenture
directs that, if upon such action by the Sponsor there would be no Sponsor  then
acting,  the Trustee shall either (1) appoint a successor Sponsor or Sponsors at
rates of compensation  deemed reasonable  by the Trustee  not exceeding  amounts
prescribed  by  the Securities  and Exchange  Commission,  or (2)  terminate the
Trust. The Trustee will promptly notify Unit Holders of any such action.

                                    TRUSTEE

    The Trustee is The Bank of New York, with its principal place of business at
48 Wall Street, New York, New York  10286, and its unit investment trust  office
at  101 Barclay  Street, New  York, New York  10286. Unit  Holders should direct
inquiries regarding distributions, address changes and other matters relating to
the administration of the Trust to Unit Investment Trust Division, P.O. Box 974,
Wall Street Station, New York, New York  10268-0974. The Trustee is a member  of
the  New  York Clearing  House  Association and  is  subject to  supervision and
examination by the Superintendent of Banks of the State of New York, the Federal
Deposit Insurance Corporation and the Board of Governors of the Federal  Reserve
System.

                                       12
<PAGE>
LIMITATIONS ON LIABILITY

    The  Trustee shall not be liable or  responsible in any way for depreciation
or loss  incurred by  reason of  the disposition  of any  moneys, Securities  or
Certificates  or in respect  of any evaluation  or for any  action taken in good
faith reliance on  prima facie properly  executed documents except  in cases  of
willful  misfeasance, bad faith, gross negligence  or reckless disregard for its
obligations and duties.  In addition,  the Indenture provides  that the  Trustee
shall  not  be personally  liable for  any taxes  or other  governmental charges
imposed upon or in respect of the Trust which the Trustee may be required to pay
under current or future laws of the United States or any other authority  having
jurisdiction.

RESPONSIBILITY

    For  information relating to  the responsibilities of  the Trustee under the
Indenture, reference is  made to  the material set  forth under  "Distribution,"
"Rights of Unit Holders" and "Sponsor -- Resignation."

RESIGNATION AND REMOVAL

    By  executing an instrument in writing and  filing the same with the Sponsor
and mailing  a copy  of a  notice of  resignation to  all Unit  Holders then  of
record,  the Trustee and any successor may  resign. In such an event the Sponsor
is obligated to appoint a successor trustee as soon as possible. If the  Trustee
becomes incapable of acting or becomes bankrupt or its affairs are taken over by
public  authorities,  or upon  the determination  of the  Sponsor to  remove the
Trustee for any reason, either with or without cause, the Sponsor may remove the
Trustee and appoint a successor as  provided in the Indenture. Such  resignation
or  removal shall  become effective  upon the  acceptance of  appointment by the
successor trustee.  If upon  resignation  of a  trustee  no successor  has  been
appointed  or, if appointed, has not accepted the appointment within thirty days
after notification,  the retiring  trustee may  apply to  a court  of  competent
jurisdiction for the appointment of a successor. The resignation or removal of a
trustee   becomes  effective  only  when   the  successor  trustee  accepts  its
appointment as  such  or when  a  court  of competent  jurisdiction  appoints  a
successor trustee.

                                   EVALUATOR

   
    The  Evaluator is Kenny S&P  Evaluation Services, a division  of J. J. Kenny
Co., Inc., with main offices located at 65 Broadway, New York, New York 10006.
    

LIMITATIONS ON LIABILITY

    The Trustee, Sponsor and Unit Holders  may rely on any evaluation  furnished
by  the Evaluator  and shall  have no  responsibility for  the accuracy thereof.
Determinations by the Evaluator under the Indenture shall be made in good  faith
upon  the basis of the best information  available to it. The Evaluator shall be
under no liability to the  Trustee, the Sponsor, or  Unit Holders for errors  in
judgment, except in cases of willful misfeasance, bad faith, gross negligence or
reckless disregard of its obligations and duties.

RESPONSIBILITY

    The Indenture requires the Evaluator to evaluate the Securities in the Trust
on  the basis of their bid prices on  the last business day of June and December
in each year, on the day on which any Unit is tendered for redemption and on any
other day such  evaluation is  desired by  the Trustee  or is  requested by  the
Sponsor.  In  addition, the  Indenture requires  the  Evaluator to  evaluate the
Securities in the Trust on the basis of their offering price on certain business
days during the initial public offering period and on any other day requested by
the Sponsor or Trustee.  For information relating to  the responsibility of  the
Evaluator  to evaluate  the Securities  on the  basis of  their offering  or bid
prices as appropriate, see "Public Offering of Units -- Public Offering Price."

RESIGNATION

    The Evaluator may resign or may be removed by the Sponsor, and in such event
the Sponsor  and  the  Trustee are  to  use  their best  efforts  to  appoint  a
satisfactory  successor. Such resignation or removal shall become effective upon
the acceptance of appointment by a  successor evaluator. If upon resignation  of
the  Evaluator no  successor has accepted  appointment within  thirty days after
notice of  resignation,  the  Evaluator  may  apply  to  a  court  of  competent
jurisdiction for the appointment of a successor.

                   AMENDMENT AND TERMINATION OF THE INDENTURE

AMENDMENT

    The  Indenture  may be  amended from  time  to time  by the  parties thereto
without the consent of any  of the Unit Holders when  such an amendment is  made
(1)  to cure  any ambiguity  or to  correct or  supplement any  provision of the
Indenture which  may  be defective  or  inconsistent with  any  other  provision
contained therein, (2) to change any provision as required by the Securities and
Exchange Commission, or (3) to make such other provisions as shall not adversely
affect  the interests of the Unit Holders; provided, that the Indenture may also
be amended by  the Sponsor and  the Trustee (or  the performance of  any of  the
provisions  of the  Indenture may  be waived) with  the consent  of Unit Holders
owning

                                       13
<PAGE>
51% of the Units of the Trust at the time outstanding for the purposes of adding
any provisions to or changing in any manner or eliminating any of the provisions
of the Indenture or of modifying in any manner the rights of Unit Holders. In no
event, however, shall the Indenture be  amended to increase the number of  Units
issuable  thereunder or  to permit the  deposit or acquisition  of securities or
other property  either  in  addition  to  or in  substitution  for  any  of  the
Securities initially deposited in the Trust, except as initially provided in the
Indenture  or to  provide the Trustee  with the  power to engage  in business or
investment activities not specifically authorized in the Indenture as originally
adopted or so  as to adversely  affect the  characterization of the  Trust as  a
grantor  trust for federal income  tax purposes. In the  event of any amendment,
the Trustee  is obligated  to notify  all Unit  Holders promptly  regarding  the
substance of such amendment.

TERMINATION

    The Trust may be terminated at any time by the consent of the holders of 51%
of  the  Units  or  upon  the  maturity,  redemption,  payment,  sale  or  other
disposition, as  the case  may  be, of  the last  Security  held in  the  Trust.
However,  in no  event may the  Trust continue beyond  the Mandatory Termination
Date set forth under Part A -- "Summary of Essential Information." In the  event
of  termination, written notice thereof will be  sent by the Trustee to all Unit
Holders. Within a reasonable period after termination, the Trustee will sell any
Securities remaining in the terminated Trust and, after paying all expenses  and
charges  incurred  by  the Trust,  will  distribute  to each  Unit  Holder, upon
surrender for cancellation of his Certificate  for Units, his pro rata share  of
the  balances  remaining in  the Interest  and Principal  Accounts. The  sale of
Securities in the Trust upon termination may result in a lower amount than might
otherwise be realized  if such sale  were not  required at such  time. For  this
reason,  among others, the amount realized by a Unit Holder upon termination may
be less than the principal amount of Securities represented by the Units held by
such Unit Holder.

                                 LEGAL OPINIONS

    Certain legal matters in connection with the Units offered hereby have  been
passed  upon by Cahill Gordon &  Reindel, a partnership including a professional
corporation, 80 Pine Street,  New York, New York  10005, as special counsel  for
the Sponsor.

                                    AUDITORS

   
    The  financial statements of the Trust included in this Prospectus have been
audited by DELOITTE  & TOUCHE LLP,  certified public accountants,  as stated  in
their  report appearing  herein, and are  included in reliance  upon such report
given upon the authority of that firm as experts in accounting and auditing.
    

                            DESCRIPTION OF RATING *

    A Standard & Poor's Corporation rating  on the units of an investment  trust
(hereinafter  referred  to  collectively as  "units"  and "fund")  is  a current
assessment of  creditworthiness with  respect to  the investments  held by  such
fund.  This assessment  takes into consideration  the financial  capacity of the
issuers and of any guarantors, insurers, lessees, or mortgagors with respect  to
such investments. The assessment, however, does not take into account the extent
to  which  fund expenses  or  portfolio asset  sales  for less  than  the fund's
purchase price  will reduce  payment to  the  Unit Holder  of the  interest  and
principal  required to be paid on the  portfolio assets. In addition, the rating
is not a recommendation to purchase, sell, or hold units, inasmuch as the rating
does not comment as to market price of the units or suitability for a particular
investor.

    Funds rated "AAA" are composed exclusively of assets that are rated "AAA" by
Standard &  Poor's  and/or certain  short-term  investments. Standard  &  Poor's
defines  its  AAA rating  for  such assets  as  the highest  rating  assigned by
Standard &  Poor's to  a debt  obligation. Capacity  to pay  interest and  repay
principal is very strong.

---------
*As described by Standard & Poor's Corporation.

                                       14
<PAGE>
----------------------------------- Sponsor: -----------------------------------
                    (DEAN WITTER REYNOLDS INC. LOGO)
               Two World Trade Center - New York, New York 10048
--------------------------------------------------------------------------------
                                                                           37684

<PAGE>


               CONTENTS OF REGISTRATION STATEMENT

          This registration statement comprises the following
documents:

          The facing sheet.
          The Cross-reference Sheet.
          The Prospectus.
          The signatures.
          Written consents of the following persons:

               `Cahill Gordon & Reindel (included in Exhibit 5)
               `Deloitte & Touche LLP
               `Kenny S&P Evaluation Services, a division of
                J.J. Kenny Co., Inc., as Evaluator
               `Standard & Poor's Corporation

The following exhibits:


*   EX-3(a)  Certificate of Incorporation of Dean Witter Reynolds
             Inc.

*   EX-3(b)  By-laws of Dean Witter Reynolds Inc.

**  EX-4.1   Trust Indenture and Agreement, dated March 16, 1994

*** EX-4.2   Reference Trust Agreement, dated March 13, 1995

    EX-4.3   Form of Certificate of Beneficial Interest (included
             in Trust Indenture and Agreement)

*** EX-5     Opinion of counsel as to legality of securities
             being registered

*** EX-23.1  Consent of Independent Auditors

*** EX-23.2  Consent of Kenny S&P Evaluation Services

*** EX-23.3  Consent of Standard & Poor's Ratings Group

    EX-23.4  Consent of Cahill Gordon & Reindel (included in
             Exhibit 5)

____________________

*    Incorporated by reference to the same exhibit in the
     Registration Statement of Sears Tax-Exempt Investment Trust,
     Insured Long Term Series 33 and Long Term Municipal Portfolio
     Series 106, Registration Numbers 33-38086 and 33-37629,
     respectively.

**   Incorporated by reference to the same exhibit in the
     Registration Statement of Dean Witter Select Government
     Trust, U.S. Treasury Series 7, Registration No. 33-49975.

***  Filed herewith.



<PAGE>


*** Ex-27    Financial Data Schedule

    EX-99    Information as to Officers and Directors of Dean
             Witter Reynolds Inc. is incorporated by reference to
             Schedule A and D of Form BD filed by Dean Witter
             Reynolds Inc. pursuant to Rule 15b1-1 and 15b3-1
             under the Securities Exchange Act of 1934 (1934 Act
             File No. 8-14171).


______________________
*** Filed herewith.



<PAGE>


                           SIGNATURES

     The Registrant, Dean Witter Select Government Trust, U.S.
Treasury Series 8, hereby identifies the Sears Government
Investment Trust, U.S. Treasury Series 1 and Freddie Mac
Portfolio Series 3 of the Trust for the purposes of the
representations required by Rule 487 and represents the
following:

     1)   That the portfolio securities deposited in the series
          as to the securities of which this registration
          statement is being filed do not differ materially in
          the type or quality from those deposited in such
          previous series;

     2)   That, except to the extent necessary to identify the
          specific portfolio securities deposited in, and to
          provide essential financial information for, the series
          with respect to the securities of which this
          registration statement is being filed, this
          registration statement does not contain disclosure
          that differs in any material respect from that
          contained in the registration statement for such
          previous series as to which the effective date was
          determined by the Commission or the staff;

     3)   That it has complied with Rule 460 under the Securities
          Act of 1933.


<PAGE>


     Pursuant to the requirements of the Securities Act of 1933,
as amended, the registrant, Dean Witter Select Government Trust,
U.S. Treasury Series 8, has duly caused this Amendment No. 1 to
the Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, all in the City of New
York and State of New York on the 13th day of March, 1995.

                              DEAN WITTER SELECT GOVERNMENT
                              TRUST, U.S. TREASURY SERIES 8
                              (Registrant)

                              By: Dean Witter Reynolds Inc.
                              (Depositor)

                              Michael D. Browne
                              Authorized Signatory

          Pursuant to the requirements of the Securities Act of
1933, this Amendment No. 1 to the Registration Statement has been
signed on behalf of Dean Witter Reynolds Inc., the Depositor, by
the following person in the following capacities and by the
following persons who constitute a majority of the Depositor's
Board of Directors in the City of New York, and State of New
York, on this 13th day of March, 1995.

DEAN WITTER REYNOLDS INC.

       Name               Office
      ------             --------

Philip J. Purcell    Chairman & Chief      )
                     Executive Officer and )
                     Director*

                                           By

                                           Michael D. Browne
                                           Attorney-in-fact*

_____________________

*    Executed copies of the Powers of Attorney have been filed
     with the Securities and Exchange Commission in connection
     with the Registration Statement on Form S-6 for Dean Witter
     Select Equity Trust, Select 10 International Series 95-1,
     File No. 33-56389.


<PAGE>


 Name                               Office
------                             --------

Richard M. DeMartini               Director*
Nancy S. Donovan                   Director*
Robert J. Dwyer                    Director*
Christine A. Edwards               Director*
James S. Higgins                   Director*
Stephen R. Miller                  Director*
Richard F. Powers                  Director*
Philip J. Purcell                  Director*



_____________________

*    Executed copies of the Powers of Attorney have been filed
     with the Securities and Exchange Commission in connection
     with the Registration Statement on Form S-6 for Dean Witter
     Select Equity Trust, Select 10 International Series 95-1,
     File No. 33-56389.



<PAGE>


                          EXHIBIT INDEX
                               TO
                            FORM S-6
                     REGISTRATION STATEMENT
                UNDER THE SECURITIES ACT OF 1933

EXHIBIT NO.          TITLE OF DOCUMENT
------------        -------------------

*   EX-3(a)  Certificate of Incorporation of Dean Witter Reynolds
             Inc.

*   EX-3(b)  By-laws of Dean Witter Reynolds Inc.

**  EX-4.1   Trust Indenture and Agreement, dated March 16, 1994

*** EX-4.2   Reference Trust Agreement, dated March 13, 1995

    EX-4.3   Form of Certificate of Beneficial Interest (included
             in Trust Indenture and Agreement)

*** EX-5     Opinion of counsel as to legality of securities
             being registered

*** EX-23.1  Consent of Independent Auditors

*** EX-23.2  Consent of Kenny S&P Evaluation Services

*** EX-23.3  Consent of Standard & Poor's Ratings Group

    EX-23.4  Consent of Cahill Gordon & Reindel (included in
             Exhibit 5)

*** Ex-27    Financial Data Schedule

    EX-99    Information as to Officers and Directors of Dean
             Witter Reynolds Inc. is incorporated by reference to
             Schedule A and D of Form BD filed by Dean Witter
             Reynolds Inc. pursuant to Rule 15b1-1 and 15b3-1
             under the Securities Exchange Act of 1934 (1934 Act
             File No. 8-14171).



____________________

*    Incorporated by reference to the same exhibit in the
     Registration Statement of Sears Tax-Exempt Investment Trust,
     Insured Long Term Series 33 and Long Term Municipal Portfolio
     Series 106, Registration Numbers 33-38086 and 33-37629,
     respectively.

**   Incorporated by reference to the same exhibit in the
     Registration Statement of Dean Witter Select Government
     Trust, U.S. Treasury Series 7, Registration No. 33-49975.

***  Filed herewith.



<PAGE>



               DEAN WITTER SELECT GOVERNMENT TRUST
               U.S. Treasury Series 8
               REFERENCE TRUST AGREEMENT


          This Reference Trust Agreement dated March 13, 1995
among DEAN WITTER REYNOLDS INC., as Depositor, THE BANK OF NEW
YORK, as Trustee and KENNY S&P EVALUATION SERVICES, as Evaluator,
sets forth certain provisions in full and incorporates other
provisions by reference to the document entitled "Dean Witter
Select Government Trust, Trust Indenture and Agreement" (the
"Basic Agreement") dated March 16, 1994.  Such provisions as are
incorporated by reference constitute a single instrument (the
"Indenture").

                        WITNESSETH THAT:
                        ---------------

          In consideration of the premises and of the mutual
agreements herein contained, the Depositor, the Trustee, and the
Evaluator agree as follows:

                                I
                                -

             STANDARD TERMS AND CONDITIONS OF TRUST

          Subject to the provisions of Part II hereof, all the
provisions contained in the Basic Agreement are herein
incorporated by reference in their entirety and shall be deemed
to be a part of this instrument as fully and to the same extent
as though said provisions had been set forth in full in this
instrument.

                               II
                               --

              SPECIAL TERMS AND CONDITIONS OF TRUST

          The following special terms and conditions are hereby
agreed to:

          A.   The Trust is denominated Dean Witter Select
Government Trust, U.S. Treasury Series 8 (the "Treasury Trust").

          B.   The securities listed in Schedule A hereto are
those which, subject to the terms of this Indenture, have been or
are to be deposited in trust under this Indenture.

          C.   The term, "Depositor" shall mean Dean Witter
Reynolds Inc.


<PAGE>


                               -2-



          D.   The aggregate number of Units referred to in
Sections 2.03 and 9.01 of the Basic Agreement is 500,000 for the
Treasury Trust.

          E.   A Unit is hereby declared initially equal to
1/500,000th for the Treasury Trust.

          F.   The distribution on the First Distribution Date,
April 15, 1995, to Unit Holders of record on the first Record Date,
April 9, 1995, shall be a partial distribution in the amount of 4.69
per 1000 Units.

          G.   The term "First Settlement Date" shall mean
March 21, 1995.

          H.   For the Treasury Trust, the term "Record Date"
shall mean the 9th day of each month commencing May, 1995.

          I.   For the Treasury Trust, the term "Distribution
Date" shall mean the 15th day of each month following the
Record Date commencing May, 1995.

          J.   The term "Termination Date" shall mean February 1, 2000.

          K.   For purposes of this Series -- Dean Witter Select
Government Trust, U.S. Treasury Series 8 -- the form of
Certificate set forth in this Indenture shall be appropriately
modified to reflect the title of this Series and such of the
Special Terms and Conditions of Trust set forth herein as may be
appropriate.

          L.   For the Treasury Trust, the Evaluators Fee shall
be a minimum of $10.00 per evaluation plus $0.40 for each issue of
underlying Securities.

          M.   For the Treasury Trust, the Depositor's Annual
Supervision Fee shall be a maximum of $0.25 per $1,000 principal
amount of underlying Securities.

          N.   For the Treasury Trust, the Trustee's Annual Fee
as defined in the Indenture shall be $1.32 per $1,000 principal
amount of underlying Securities.

          O.   With respect to distributions from the Principal
Account only, Record Date shall also mean the first Business Day
following the date of maturity of any Bond prior to the
Termination of the Trust.  The Trustee shall distribute by mail
to each Unit Holder of record at the close of business on such
Record Date such Unit Holder's pro rata share of the cash balance
of the Principal Account as of such Record Date on the second
Business Day following such Record Date.


<PAGE>


                               -3-



          The Schedule of Portfolio Securities in the prospectus
included in this Registration Statement is hereby incorporated by
reference as Schedule a hereto.



<PAGE>


             [Letterhead of Cahill Gordon & Reindel]

















                         March 13, 1995




Dean Witter Reynolds Inc.
Two World Trade Center
New York, New York  10048


          Re:  Dean Witter Select Government Trust,
               U.S. Treasury Series 8
               ------------------------------------

Gentlemen:

          We have acted as special counsel for you as Depositor
of the Dean Witter Select Government Trust, U.S. Treasury
Series 8 (the "Trust"), in connection with the issuance under the
Trust Indenture and Agreement, dated March 16, 1994 and the
related Reference Trust Agreement, dated March 13, 1995 (such
Trust Indenture and Agreement and Reference Trust Agreement
collectively referred to as the "Indenture"), among you, as
Depositor, The Bank of New York, as Trustee and Kenny S&P
Evaluation Services, a division of J.J. Kenny Co., Inc., as
Evaluator, of units of fractional undivided interest in said
Trust (the "Units") comprising the Units of Dean Witter Select
Government Trust, U.S. Treasury Series 8.  In rendering our
opinion expressed below, we have relied in part upon the opinions
and representations of your officers and upon opinions of counsel
to Dean Witter Reynolds Inc.

          Based upon the foregoing, we advise you that, in our
opinion, when the Indenture has been duly executed and delivered
on behalf of the Depositor and the Trustee and when the
certificate evidencing the Units has been duly executed and
delivered by the Depositor and the Trustee in accordance with the


<PAGE>


                               -2-



Indenture, the Units will be legally issued, fully paid and
nonassessable by the Trust, and will constitute valid and binding
obligations of the Trust and the Depositor in accordance with
their terms, except that enforceability of certain provisions
thereof may be limited by applicable bankruptcy, insolvency,
reorganization, moratorium or other similar laws affecting
creditors generally and by general equitable principles.

          We hereby consent to the filing of this opinion as an
exhibit to the Registration Statement (File No. 33-57563)
relating to the Units referred to above and to the use of our
name and to the reference to our firm in said Registration
Statement and the related Prospectus.

                                   Very truly yours,

                                   Cahill Gordon & Reindel



<PAGE>


                 CONSENT OF INDEPENDENT AUDITORS

          We consent to the use of our report dated March 13,
1995, accompanying the financial statements of the Dean Witter
Select Government Trust, U.S. Treasury Series 8 included herein
and to the reference to our Firm as experts under the heading
"Auditors" in the prospectus which is a part of this registration
statement.


                                   Deloitte & Touche LLP

New York, New York
March 13, 1995



<PAGE>


          (Letterhead of Kenny S&P Evaluation Services,
               a division of J.J. Kenny Co., Inc.)




Dean Witter Reynolds, Inc.
Two World Trade Center
New York, NY  10048

            Re:  Dean Witter Select Government Trust,
                 U.S. Treasury Series 8
                 ------------------------------------

Gentlemen:

          We have examined Registration Statement File
No. 33-57563 for the above-captioned trust.  We hereby
acknowledge that Kenny S&P Evaluation Services, a division of
J.J. Kenny Co., Inc. is currently acting as the evaluator for the
trust.  We hereby consent to the use in the Registration
Statement of the reference to Kenny S&P Evaluation Services, a
division of J.J. Kenny Co., Inc. as evaluator.

          You are hereby authorized to file a copy of this letter
with the Securities and Exchange Commission.

                              Sincerely,


                              Frank A. Ciccotto
                              Frank A. Ciccotto


March 13, 1995



<PAGE>


         (Letterhead of Standard & Poor's Ratings Group)











Mr. Michael D. Browne
Dean Witter Reynolds, Inc.
2 World Trade Center
New York, NY 10048

               Re:  Dean Witter Select Government Trust
                    U.S. Treasury Series 8
                    (SEC Reg. # 33-57563)
                    -----------------------------------

Dear Mr. Browne:

          Pursuant to your request for a Standard & Poor's rating
on the units of the above captioned trust, we have reviewed the
information presented to us and have assigned an "AAA" rating to
the units in the trust.  The rating is a direct reflection of the
portfolio of the trust, which will be composed solely of U.S.
Treasury Debt Obligations fully guaranteed as to principal and
interest by the full faith and credit of the United States.

          You have permission to use the name of Standard &
Poor's Ratings Group, a division of McGraw-Hill, Inc. and the
above-assigned rating in connection with your dissemination of
information relating to these units, provided that it is
understood that the rating is not a "market" rating nor a
recommendation to buy, hold, or sell the units of the trust.
Further, it should be understood the rating does not take into
account the extent to which fund expenses or portfolio asset
sales for less than the fund's purchase price will reduce payment
to the unit holders of the interest and principal required to be
paid on the portfolio assets.  S&P reserves the right to advise
its own clients, subscribers, and the public of the rating.  S&P
relies on the sponsor and its counsel, accountants, and other
experts for the accuracy and completeness of the information
submitted in connection with the rating.  S&P does not
independently verify the truth or accuracy of any such
information.

          This letter evidences our consent to the use of the
name of Standard & Poor's Ratings Group, a division of
McGraw-Hill, Inc. and the above-assigned rating in the
registration statement or prospectus relating to the units or the
trust.  However, this letter should not be construed as a consent
by us, within the meaning of Section 7 of the Securities Act of


<PAGE>


1933, to the use of the name of Standard & Poor's Ratings Group,
a division of McGraw-Hill, Inc. in connection with the ratings
assigned to the securities contained in the trust.  You are
hereby authorized to file a copy of this letter with the
Securities and Exchange Commission.

          Please be certain to send us three copies of your final
prospectus as soon as it becomes available.  Should we not
receive them within a reasonable time after the closing or should
they not conform to the representations made to us, we reserve
the right to withdraw the rating.

          We are pleased to have had the opportunity to be of
service to you.  Our bill will be sent to you within one month.
If we can be of further help, please do not hesitate to call upon
us.

                                   Sincerely,



                                   Sanford B. Bragg
                                   Managing Director

March 13, 1995


<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<LEGEND>
THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS FOR DEAN WITTER SELECT GOVERNMENT TRUST U.S.
TREASURY SERIES 8 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
   <NUMBER> 8
   <NAME> D/W SELECT GOVERNMENT TRUST U.S. TREASURY SERIES
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   OTHER
<FISCAL-YEAR-END>                          MAR-13-1995
<PERIOD-START>                             MAR-13-1995
<PERIOD-END>                               MAR-13-1995
<INVESTMENTS-AT-COST>                          505,681
<INVESTMENTS-AT-VALUE>                         498,811
<RECEIVABLES>                                    6,870
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 505,681
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                            0
<TOTAL-LIABILITIES>                                  0
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       505,681
<SHARES-COMMON-STOCK>                          500,000
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                   505,681
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                       0
<NET-INVESTMENT-INCOME>                              0
<REALIZED-GAINS-CURRENT>                             0
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                                0
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        500,000
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                               0
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                0
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                      0
<AVERAGE-NET-ASSETS>                                 0
<PER-SHARE-NAV-BEGIN>                                0
<PER-SHARE-NII>                                      0
<PER-SHARE-GAIN-APPREC>                              0
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                                  0
<EXPENSE-RATIO>                                      0
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


</TABLE>


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