SEARS GOVERNMENT INVESTMENT TRUST U S TREASURY SERIES 7
485BPOS, 1995-06-01
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<PAGE>

                                         U.S. Treasury Series 7
                                              File No. 33-49975
                            Investment Company Act No. 811-3718


              SECURITIES AND EXCHANGE COMMISSION
                    WASHINGTON, D.C.  20549
   
                POST-EFFECTIVE 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 7
    
     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 agent 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
          New York, New York  10005

          The Registrant has registered an indefinite number of
          Units of Beneficial Interest pursuant to Rule 24f-2
          promulgated under the Investment Company Act of 1940,
          as amended.  On May 10, 1995, the Registrant filed
          the Rule 24f-2 Notice for its most recent fiscal
          year.

          Check box if it is proposed that this filing should
     /x/  become effective immediately upon filing pursuant to
          paragraph(b) of Rule 485.
    


     

<PAGE>

                    DEAN WITTER SELECT GOVERNMENT TRUST
                          U.S. TREASURY SERIES 7

                           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          

2.    Name and address of Depositor             Table of Contents

3.    Name and address of Trustee               Table of Contents

4.    Name and address of principal             Table of Contents
      Underwriter

5.    Organization of Trust                     Introduction

6.    Execution and termination of              Introduction; Amendment
      Indenture                                 and Termination of the
                                                Indenture
   
7.    Changes of name                           <F30>
    
8.    Fiscal Year                               Included in Form N-8B-2
   
9.    Litigation                                <F30>
    
      II.  General Description of the Trust
           and Securities of the Trust     

10.   General Information regarding             
      Trust's Securities and Rights             
      of Holders                                

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

      b)    Type of Securities                  Administration of the
____________________
   
<F30>   Not applicable, answer negative or not required.
    

<PAGE>

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

            (Cumulative or                      Trust-Distribution
            Distributive)                       

      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 Units-
            conversion, transfer, etc.          Secondary Market;
                                                Exchange Option;
                                                Redemption; Rights of
                                                Unit Holders-Certificates
   
      e)    Lapses or defaults with             <F30>
            respect to periodic payment         
            plan certificates                   
    
      f)    Voting rights as to                 Rights of Unit Holder-
            Securities under the                Certain Limitations
            Indenture                           

      g)    Notice to Holders as to             Amendment and Termina-
            change in:                          tion of the Indenture

            1)    Assets of Trust               Administration of the
                                                Trust-Reports to Unit
                                                Holders; The
                                                Trust-Summary Description
                                                of the Portfolios

            2)    Terms and Conditions          Amendment and Termination
                  of Trust's Securities         of the Indenture

            3)    Provisions of Trust           Amendment and Termination
                                                of the Indenture

            4)    Identity of Depositor         Sponsor; Trustee
                  and Trustee                   

      h)    Security Holders consent
            required to change:                 

            1)    Composition of assets         Amendment and Termination
                  of Trust                      of the Indenture

            2)    Terms and conditions          Amendment and Termination
____________________
   
<F30>   Not applicable, answer negative or not required.
    

<PAGE>

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

                  of Trust's Securities         of the Indenture

            3)    Provisions of Indenture       Amendment and Termination
                                                of the Indenture
   
            4)    Identity of Depositor         <F30>
                  and Trustee                   
    
                  (i)  Other Provisions         Cover of Prospectus; tax
                                                status

11.   Type of securities comprising             The Trust-Summary
      units                                     Description of the
                                                Portfolios; Objectives
                                                and Securities Selection;
                                                The Trust-Special
                                                Considerations
   
12.   Type of securities comprising             <F30>
      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                 <F30>
            regarding periodic payment          
            certificates                        
    
      c)    Certain percentages                 Summary of Essential
                                                Information; Public
                                                Offering of Units-Public
                                                Offering Price;
                                                -Profit of Sponsor;
                                                -Volume Discount

      d)    Price differentials                 Public Offering of Units
                                                - Public Offering Price

      e)    Certain other fees, etc.            Rights of Unit Holders -
            payable by holders                  Certificates

      f)    Certain profits receivable          Redemption -- Purchase by
____________________
   
<F30>   Not applicable, answer negative or not required.
    

<PAGE>

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

            by depositor, principal             the Sponsors of Units
            underwriters, trustee or            Tendered for Redemption
            affiliated persons                  
   
      g)    Ratio of annual charges             <F30>
            to income                           
    
14.   Issuance of trust's securities            Introduction; Rights of
                                                Unit Holders -
                                                Certificates

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

16.   Acquisition and disposition               Introduction; Amendment
      of underlying securities                  and Termination of the
                                                Indenture; Objectives and
                                                Securities Selection; The
                                                Trust-Summary Description
                                                of the Portfolio;
                                                Sponsor-Responsibility

17.   Withdrawal or redemption                  Redemption; Public Offer-
      by Security Holders                       ing of Units-Secondary
                                                Market;

18.   a)    Receipt and disposition             Administration of the
            of income                           Trust; Reinvestment
                                                Programs

      b)    Reinvestment of                     Reinvestment Programs
            distributions                       

      c)    Reserves or special fund            Administration of the
                                                Trust-Distribution
   
      d)    Schedule of distribution            <F30>
    
19.   Records, accounts and report              Administration of the
                                                Trust-Records and
                                                Accounts;-Reports to Unit
                                                Holders

20.   Certain miscellaneous                     Amendment and Termination
      provisions of the Indenture               of the Indenture; Sponsor
                                                - Limitation on Liability
____________________
   
<F30>   Not applicable, answer negative or not required.
    

<PAGE>

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

                                                - Resignation; Trustee -
                                                - Limitation on Liability
                                                - Resignation
   
21.   Loans to security holders                 <F30>
    
22.   Limitations on liability                  Sponsor, Trustee;
                                                Evaluator - Limitation on
                                                Liability

23.   Bonding arrangements                      Included on Form N-8B-2
   
24.   Other material provisions of              <F30>
      the 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             <F30>

31.   Payments by Depositor for                 <F30>
      certain other services                    

32.   Payments by Depositor for                 <F30>
      certain other services                    
      rendered to trust                         

33.   Remuneration of employees of              <F30>
      Depositor for certain services            
      rendered to trust                         
    
____________________
   
<F30>   Not applicable, answer negative or not required.
    

<PAGE>

Form N-8B-2                                     Form S-6
Item Number                                     Heading in Prospectus
   
34.   Remuneration of other                     <F30>
      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                    <F30>
      trust's securities                        

37.   Revocation of authority to                <F30>
      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        <F30>
            underwriter                         

      c)    Salesman of principal               <F30>
            underwriter                         

42.   Ownership of trust's securities           <F30>
      by certain persons                        

43.   Certain brokerage commissions             <F30>
      received by principal underwriter
    
44.   a)    Method of valuation                 Public Offering of Units
   
      b)    Schedule as to offering             <F30>
            price
    
____________________
   
<F30>   Not applicable, answer negative or not required.
    

<PAGE>

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

      c)    Variation in offering               Public Offering of Units-
            price to certain persons            -Volume Discount;
                                                Exchange option
   
45.   Suspension of redemption rights           <F30>
    
46.   a)    Redemption valuation                Public Offering of Units-
                                                Secondary Market;
                                                Redemption
   
      b)    Schedule as to redemption           <F30>
            price                               
    
47.   Maintenance of position in                See items 10(d), 44 and
      underlying securities                     46

      V.  Information concerning the Trustee or Custodian

48.   Organization and regulation               Trustee
      of Trustee                                

49.   Fees and expenses of Trustee              Expenses and Charges

50.   Trustee's lien                            Expenses and Charges

      VI.  Information concerning Insurance
            of Holders of Securities        
   
51.   a)    Name and address of                 <F30>
            Insurance Company                   

      b)    Type of policies                    <F30>

      c)    Type of risks insured and           <F30>
            excluded                            

      d)    Coverage of policies                <F30>

      e)    Beneficiaries of policies           <F30>

      f)    Terms and manner of                 <F30>
            cancellation                        

      g)    Method of determining               <F30>
            premiums                            
    
____________________
   
<F30>   Not applicable, answer negative or not required.
    

<PAGE>

Form N-8B-2                                     Form S-6
Item Number                                     Heading in Prospectus
   
      h)    Amount of aggregate                 <F30>
            premiums paid                       

      i)    Who receives any part of            <F30>
            premiums                            

      j)    Other material provisions           <F30>
            of the Trust relating to            
            insurance                           
    
      VII.  Policy of Registrant

52.   a)    Method of selecting and             Introduction; Objectives
            eliminating securities              and Securities Selection;
            from the Trust                      The Trust - Summary
                                                Description of the
                                                Portfolio; Sponsor -
                                                Responsibility
   
      b)    Elimination of securities           <F30>
            from the Trust                      
    
      c)    Policy of Trust regarding           Introduction; Objectives
            substitution and                    and Securities Selection;
            elimination of securities           Sponsor - Responsibility
   
      d)    Description of any                  <F30>
            fundamental policy of the           
            Trust                               
    
53.   Taxable status of the                     Cover of Prospectus; Tax
      Trust                                     Status

      VIII.  Financial and Statistical Information
   
54.   Information regarding the                 <F30>
      Trust's past ten fiscal years             

55.   Certain information regarding             <F30>
      periodic payment plan                     
      certificates                              

56.   Certain information regarding             <F30>
      periodic payment plan                     
      certificates                              
    
____________________
   
<F30>   Not applicable, answer negative or not required.
    

<PAGE>

Form N-8B-2                                     Form S-6
Item Number                                     Heading in Prospectus
   
57.   Certain information regarding             <F30>
      periodic payment plan                     
      certificates                              

58.   Certain information regarding             <F30>
      periodic payment plan                     
      certificates
    
59.   Financial statements                      Statement of Financial
      (Instruction 1(c) to Form S-6)            Condition

____________________
   
<F30>   Not applicable, answer negative or not required.
    

      

<PAGE>

                       ATTENTION FOREIGN INVESTORS:
YOUR INCOME FROM THIS TRUST IS EXEMPT FROM FEDERAL WITHHOLDING
         TAXES WHEN CERTAIN CONDITIONS ARE MET UNDER CURRENT LAW.
                                                                           
LOGO

Dean Witter Select Government Trust
   
U.S. Treasury Series 7
(LADDERED MATURITIES)

Standard & Poor's Corporation Rating:  AAA

(A Unit Investment Trust)
_______________________________________________________________

This 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 from the Date of Deposit 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, is exempt from federal withholding taxes for
qualified foreign investors if certain conditions are met.
_______________________________________________________________
The Initial Public Offering of Units in the Trust has been
completed.  The Units offered hereby are issued and outstanding
Units which have been acquired by the Sponsor either by
purchase from the Trustee of Units tendered for redemption or
in the Secondary Market.
                                                                           
    
Sponsor:  LOGO    DEAN WITTER REYNOLDS INC. 

_______________________________________________________________

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.
      

<PAGE>
   
Units of the 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.

                       Prospectus dated June 1, 1995
    









      

<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 7

                            TABLE OF CONTENTS 

                                                                  Page
   
Table of Contents.................................                A-1
Summary of Essential Information..................                A-3
Introduction......................................                  1
The Trust.........................................                  2
      Special Considerations.......................                 2
      Summary Description of the Portfolio.........                 3
      Rating of Units..............................                 4
      Objectives and Securities Selection..........                 4
      The Units....................................                 5
      Estimated Annual Income, Estimated Current
        Return and Estimated Long-Term Return
        Per 1,000 Units............................                 5
Tax Status of the Trust...........................                  6
Retirement Plans..................................                 10
Public Offering of Units..........................                 11
      Public Offering Price........................                11
      Public Distribution..........................                12
      Secondary Market.............................                12
      Profit of Sponsor............................                13
      Volume Discount..............................                13
Reinvestment Program..............................                 14
Redemption........................................                 15
      Right of Redemption..........................                15
      Computation of Redemption Price..............                16
      Postponement of Redemption...................                17
Rights of Unit Holders............................                 17
      Unit Holders.................................                17
      Certain Limitations..........................                17
Expenses and Charges..............................                 18
      Fees.........................................                18
      Other Charges................................                18
Administration of the Trust.......................                 19
      Records and Accounts.........................                19
      Distribution.................................                20
      Distributions from the Interest 
        and Principal Accounts.....................                20
      Reports to Unit Holders......................                22
Sponsor...........................................                 23


                                    A-1
      

<PAGE>


                                                                  Page

Trustee...........................................                 25
Evaluator.........................................                 26
Amendment and Termination of the Indenture........                 27
Legal Opinions....................................                 28
Auditors..........................................                 28
Description of Rating.............................                 28
Independent Auditor's Report......................                F-1
    


                                 Sponsor:

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

                               Evaluator:
   
                   Kenny S&P Evaluation Services,
                 a Division of J.J. Kenny Co., Inc.
                               65 Broadway
                      New York, New York  10006
    
                                 Trustee:

                         The Bank of New York
                           101 Barclay Street
                      New York, New York  10286

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.



                                    A-2
      

<PAGE>
<TABLE>
<CAPTION>

                                     SUMMARY OF ESSENTIAL INFORMATION
                                                     
                                   DEAN WITTER SELECT GOVERNMENT TRUST
                                          U.S. TREASURY SERIES 7
                                                     
                                         As of February 28, 1995
<S>                                                                                   <C>
Number of Units                                                                           69,500,000<F3>

Fractional Undivided Interest in the Trust Represented by Each Unit                   1/69,500,000th

Public Offering Price per 1,000 Units:

    Aggregate Value of Securities in the Trust                                        $67,020,935.00

    Divided by 69,500,000 Units (times 1,000)                                         $       964.33

    Plus Sales Charge<F1> of 1.500% of Public Offering Price (1.523% of net amount  
      invested in Securities)                                                                  14.69

    Public Offering Price per 1,000 Units                                             $       979.02

    Plus amounts per 1,000 Units of Undistributed Net Investment Income                         3.24

                                                                                      $       982.26

Sponsor's Repurchase Price per 1,000 Units and Redemption Price per 1,000 Units (based 
    on the value of the underlying Securities, $3.24 less than the Public Offering 
    Price per 1,000 Units) plus amounts of Undistributed Net Investment Income        $       979.02

Estimated Long-Term Return (based on Public Offering Price)<F2>                                 6.64%

                                                  
<S>                                              <C>
Evaluation Time                                  Close of trading on the New York Stock Exchange 
                                                 (currently 4:00 PM New York time).
                                                      
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 Amount            No distribution need be made from the Principal 
                                                 Account if the balance therein is less than $1.00 
                                                 per 1,000 Units outstanding.
                                                      
Mandatory Termination Date                       May 1, 2000
                                                      
Discretionary Liquidation Amount                 The Indenture may be terminated by the Sponsor if the 
                                                 value of the Trust at any time is less than                 
                                                 $26,837,754.<F3>                                       
                                                      
Trustee's Annual Fee and Expenses (including          
   estimated expenses and evaluator's fee)       $1.68 per 1,000 face amount of underlying Securities.
                                                      
Sponsor's Annual Portfolio Supervision Fee       Maximum of $.25 per 1,000 face amount of underlying 
                                                 Securities.
                                                      
                                                 Minimum of $10.00 plus $.40 for each issue of underlying 
                                                 Securities

                 

<F1>Volume purchasers of Units are entitled to a reduced sales charge.  See "Public Offering of Units - 
Volume Discount" in this Prospectus.

<F2>The Estimated Long-Term Return is increased for transactions entitled to a reduced sales charge. (See:  
"The Trust - Estimated Annual Income and Estimated Long-Term Return" and "Public Offering of Units - 
Volume Discount", herein.) 
 
<F3>This figure will increase as the sponsor deposits additional securities into the Trust.  (See 
"Introduction" in Part B of this Prospectus.)

                                                       A-3
                                                        
</TABLE>

<PAGE>


                     SUMMARY OF ESSENTIAL INFORMATION
                               (Continued) 

   
            THE TRUST -- The Dean Witter Select Government Trust,
U.S. Treasury Series 7 (the "Trust") is a unit investment trust
composed primarily of current interest-bearing United States
Government Treasury obligations issued after July 18, 1984,
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.

            The Trust consists of a fixed portfolio of United
States Treasury obligations with consecutive annual maturities
ranging from February 15, 1996 to April 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 Trust", herein.)


                                    A-4
      

<PAGE>


            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 comprise the
Portfolio of the Trust in the following proportions based on a
percentage of total principal amount:

                                          Proportionate Relationship
Title of Security                                of Face Amount     

4.625% U.S. Treasury Notes 
  due February 15, 1996............                   20%
6.25% U.S. Treasury Notes 
  due January 31, 1997.............                   20%
5.625% U.S. Treasury Notes 
  due January 31, 1998.............                   20%
5.50% U.S. Treasury Notes 
  due February 28, 1999............                   20%
5.50% U.S. Treasury Notes 
  due April 15, 2000...............                   20%
                                                     100%

            PUBLIC OFFERING PRICE -- The Public Offering Price
per 1,000 Units is equal to the aggregate bid 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 bid side evaluation per
1,000 Units (the net amount invested); this results in a sales
charge of 1.50% of the Public Offering Price.  Units are
offered at the Public Offering Price plus accrued interest.
(See:  "Public Offering of Units", herein.)

            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", herein).
Market conditions may cause such prices to be greater or less
than the amount paid for Units.

            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 two to seven 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


                                    A-5
      

<PAGE>


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 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", herein.)

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






                                    A-6
      

<PAGE>

   
                    DEAN WITTER SELECT GOVERNMENT TRUST
                          U.S. TREASURY SERIES 7

                               INTRODUCTION 


            The Dean Witter Select Government Trust, U.S.
Treasury Series 7 (the "Trust") was created on March 16, 1994
(the "Date of Deposit") 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")<F31>,
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 is a principal operating subsidiary of Dean Witter,
Discover & Co. ("DWDC"), a publicly traded corporation.  (See:
"Sponsor", herein.)  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.

            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 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.

            On February 28, 1995, each Unit represented the
fractional undivided interest in the Securities and net income
___________________
<F31> Reference is hereby made to said Indenture and any statements
      contained herein are qualified in their entirety by the provisions of
      said Indenture.


                                     1
      

<PAGE>


of the Trust set forth under "Summary of Essential
Information".  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, 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 

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, a
substantial increase in reliance upon foreign 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", herein.

            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", herein.)

            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
    

                                     2
      

<PAGE>


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 deposited in the Trust and any Additional Securities
which may have been 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.  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 listed under
"Schedule of Portfolio Securities", herein, as long as such
Securities may continue to be held from time to time in the


                                     3
      

<PAGE>


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 or will mature in accordance
with their terms or may be sold under certain circumstances
described herein, the Trust is not expected to retain for any
length of time its present size and composition.

            The Sponsor, although not obligated to do so, intends
to maintain a secondary market for the Units based on the
aggregate bid side of the market for the Units.  (See:  "Public
Offering of Units -- Secondary Market", herein.)  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
by the Trustee at a price equal to the Redemption Price thereof
(see:  "Redemption", herein), 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, 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",
herein.)  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", herein).

            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
    


                                     4
      

<PAGE>


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 February 28, 1995, each Unit represented the
fractional undivided interest in the Trust set forth under
"Summary of Essential Information".  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.
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", herein).

Estimated Annual Income, Estimated Current Return
and Estimated Long-Term Return Per 1,000 Units

            On February 28, 1995, 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 Securities are deposited into the Trust, or as
the expenses of the Trust change.  The fees of the Trustee, the
Sponsor and the Evaluator are subject to change without the
consent of Unit Holders to the extent provided under "Expenses
and Charges", herein.

            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 bid price
of the underlying Securities.  The Estimated Long-Term Return
on February 28, 1995, is set forth under "Summary of Essential


                                     5
      

<PAGE>


Information", herein.  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 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.  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


                                     6
      

<PAGE>


      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 values 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 0.25% of the stated redemption price of
the Security at maturity multiplied by the number of complete
    

                                     7
      

<PAGE>


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.  If the
original issue discount is less than 0.25% of the stated
redemption price of the Security at maturity multiplied by the
number of complete years to maturity, the original issue
discount shall be considered to be zero.  In 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
    

                                     8
      

<PAGE>


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.


                                     9
      

<PAGE>


            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 the 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.



                                    10
      

<PAGE>


                         PUBLIC OFFERING OF UNITS

Public Offering Price
   
            The Public Offering Price of Units is computed 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".  A proportionate share of accrued and
undistributed interest on the Securities 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",
herein.)  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.

            The aggregate bid prices of the Securities in the
Trust shall be determined for the Trust by the Evaluator.
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 February 28, 1995, the Public Offering Price per
1,000 Units (based on the bid 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
    

                                    11
      

<PAGE>


amounts set forth in "Summary of Essential Information",
herein.

Public Distribution 
   
            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
from Unit Holders at the applicable Sponsor's Repurchase Price.
(See:  "Summary of Essential Information", herein.)  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


                                    12
      

<PAGE>


Unit 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",
herein.)

Profit of Sponsor
   
            The Sponsor receives a sales charge on Units sold to
the public and to dealers.  The Sponsor may 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:
   
                                             Sales Charge            
                                 Percent of Public       Percent of Net
Aggregate Value of Units          Offering Price         Amount Invested

Less than $250,000...............      1.50%                 1.523%
$250,000 to $499,999.............      1.25%                 1.266%
$500,000 or more.................      1.00%                 1.010%
    
            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


                                    13
      

<PAGE>


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:
   
                  Sales Charge       Dealer Concession

                     1.50%                  1.05%
                     1.25%                  0.875%
                     1.00%                  0.700%
    
            Dealers purchasing certain dollar amounts of Units
during the life of the Trust will be entitled to additional
concession benefits.  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. 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 contact an
account executive of the Sponsor.  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


                                    14
      

<PAGE>


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 corporate 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", above,
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


                                    15
      

<PAGE>


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.

            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", above, 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,

            (3) by dividing the result of the above computation
      by the total number of Units outstanding on the date of


                                    16
      

<PAGE>


      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 corporate 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", herein.)
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
    

                                    17
      

<PAGE>


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
   
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 without 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.

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


                                    18
      

<PAGE>


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 corporate 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.


                                    19
      

<PAGE>


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.
   
Distributions from the Interest and Principal Accounts

            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", herein.)  

            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 during the ensuing twelve months 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


                                    20
      

<PAGE>


Record Date and a Distribution Date will receive their first
distribution on the second Distribution Date following their
purchase of 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 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.  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



                                    21
      

<PAGE>

   
Holder on or immediately prior to such Distribution Date by
amounts equal to the current expenses and charges of 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
    

                                    22
      

<PAGE>


      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 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. ("DWDC"), 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 Options 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


                                    23
      

<PAGE>


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.


                                    24
      

<PAGE>


                                  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 corporate 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.

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
   
            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.
    

                                    25
      

<PAGE>


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 bid price 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 bid
prices, 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



                                    26
      

<PAGE>


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 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 "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
    

                                    27
      

<PAGE>


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 examined 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<F32>

            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.

___________________
<F32> As described by Standard & Poor's Corporation.


                                    28
      

<PAGE>
<AUDIT-REPORT>

                        INDEPENDENT AUDITORS' REPORT



THE UNIT HOLDERS, SPONSOR AND TRUSTEE
DEAN WITTER SELECT GOVERNMENT TRUST
U.S. TREASURY SERIES 7


We have audited the statement of financial condition and schedule of 
portfolio securities of the Dean Witter Select Government Trust U.S. 
Treasury Series 7 as of February 28, 1995, and the related statements of 
operations and changes in net assets for the period from March 16, 1994 
(date of deposit) to February 28, 1995.  These financial statements are the 
responsibility of the Trustee (see Footnote (a)(1)).  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 securities owned as of 
February 28, 1995 as shown in the statement of financial condition and 
schedule of portfolio securities by correspondence with The Bank of New 
York, the Trustee.  An audit also includes assessing the accounting 
principles used and the 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 financial statements referred to above present fairly, 
in all material respects, the financial position of the Dean Witter Select 
Government Trust U.S. Treasury Series 7 as of February 28, 1995, and the 
results of its operations and the changes in its net assets for the period 
from March 16, 1994 (date of deposit) to February 28, 1995 in conformity 
with generally accepted accounting principles.




DELOITTE & TOUCHE LLP



May 22, 1995
New York, New York










                                    F-1
</AUDIT-REPORT>



<PAGE>
                       STATEMENT OF FINANCIAL CONDITION
                                       
                     DEAN WITTER SELECT GOVERNMENT TRUST
                            U.S. TREASURY SERIES 7
                                       
                              February 28, 1995


                                TRUST PROPERTY

Investments in Securities at market value (cost
  $67,094,384) (Note (a) and Schedule of Portfolio
  Securities Notes (2) and (3))                                  $67,020,935

Accrued interest receivable                                          434,375

Receivable from Sponsor                                               26,312

Cash                                                                  78,558

           Total                                                  67,560,180


                          LIABILITIES AND NET ASSETS
                                       
Less Liabilities:

   Payable to Sponsor                                                283,010
   
   Accrued Trust Fees and expenses                                    30,905

           Total liabilities                                         313,915

Net Assets:

   Balance applicable to 69,500,000 Units of
     fractional undivided interest outstanding
     (Note (c)):

      Capital, less net unrealized market
        depreciation of $73,449                    $67,020,935

      Undistributed net investment
        income (Note (b))                              225,330


           Net assets                                            $67,246,265

Net asset value per Unit ($67,246,265 divided by
  69,500,000 Units)                                              $     .9676




                      See notes to financial statements




                                     F-2


<PAGE>
                           STATEMENT OF OPERATIONS
                                       
                     DEAN WITTER SELECT GOVERNMENT TRUST
                            U.S. TREASURY SERIES 7



                                                        For the period from
                                                           March 16, 1994
                                                         (date of deposit)
                                                        to February 28, 1995


Investment income - interest                                 $2,160,116

Other income                                                    174,943

           Total Income                                       2,335,059

Less Expenses:

   Trust fees and expenses                                       82,599

           Total expenses                                        82,599

           Investment income - net                            2,252,460

Unrealized market depreciation                                  (73,449)

Net increase in net assets resulting from operations         $2,179,011




                      See notes to financial statements
























                                     F-3


<PAGE>
                      STATEMENT OF CHANGES IN NET ASSETS
                                       
                     DEAN WITTER SELECT GOVERNMENT TRUST
                            U.S. TREASURY SERIES 7



                                                        For the period from
                                                           March 16, 1994
                                                         (date of deposit)
                                                        to February 28, 1995


Operations:

   Investment income - net                                   $ 2,252,460

   Unrealized market depreciation                                (73,449)

           Net increase in net assets
             resulting from operations                         2,179,011


Less Distributions to Unit Holders:

   Investment income - net                                    (2,027,130)

           Total distributions                                (2,027,130)


Plus Capital Share Transactions:

   Creation of 69,000,000 Units                               66,596,978

           Total capital share transactions                   66,596,978

Net increase in net assets                                    66,748,859

Net assets:

   Beginning of period (Note (c))                                497,406

   End of period (including undistributed
     net investment income of $225,330)                      $67,246,265




                      See notes to financial statements










                                     F-4


<PAGE>
                       NOTES TO FINANCIAL STATEMENTS
                                      
                    DEAN WITTER SELECT GOVERNMENT TRUST
                           U.S. TREASURY SERIES 7
                                      
                             February 28, 1995



(a) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

    The Trust is registered under the Investment Company Act of 1940 as a 
Unit Investment Trust.  The following is a summary of the significant 
accounting policies of the Trust:

(1) Basis of Presentation

    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 controls 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 Portfolio of 
Securities on the basis set forth in Part B of this Prospectus, 
"Public Offering of Units - Public Offering Price".  Under the 
Securities Act of 1933 ("the Act"), as amended, the Sponsor is 
deemed to be an issuer of the Trust 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 Trust's 
Registration Statement under the Act and amendments thereto.

(2) Investments

    Investments are stated at market value as determined by the 
Evaluator based on the bid side evaluations on the last day of 
trading during the period, except that value on the date of 
initial deposit (March 16, 1994) represents the cost of 
investments to the Trust based on the offering side evaluations as 
of this day.  The cost of investments purchased subsequent to the 
date of initial deposit is based on the offering side evaluations 
as of the date of purchase.

(3) Income Taxes

    The Trust is not an association taxable as a corporation for 
Federal income tax purposes; accordingly, no provision is required 
for such taxes.

(4) Expenses

    The Trust pays annual Trustee's fees, estimated expenses and 
Evaluator's fees and an annual Sponsor's portfolio supervision fee,
and may incur additional charges as explained under "Expenses and 
Charges - Fees" and "- Other Charges" in Part B of this Prospectus.

                                       F-5


<PAGE>
                       NOTES TO FINANCIAL STATEMENTS

                    DEAN WITTER SELECT GOVERNMENT TRUST
                           U.S. TREASURY SERIES 7

                             February 28, 1995


(b) DISTRIBUTIONS

    Interest received by the Trust is distributed to the Unit Holders on or 
shortly after the fifteenth day of each month after deducting 
applicable expenses.  Receipts other than interest are distributed as 
explained in "Administration of the Trust - Distribution of Interest 
and Principal" in Part B of this Prospectus.

(c) ORIGINAL COST TO INVESTORS

    The original cost to investors represents the aggregate initial public 
offering price as of the date of initial deposit (March 16, 1994) 
exclusive of accrued interest, computed on the basis set forth under 
"Public Offering of Units - Public Offering Price" in Part B of this 
Prospectus.

    A reconciliation of the original cost of Units to investors to the net 
amount applicable to investors as of February 28, 1995 follows:

       Original cost to investors                               $   504,981
       Less:  Gross underwriting commissions (sales charge)          (7,575)
       Net cost to investors                                        497,406
       Cost to investors of Units created during deposit
         period                                                  66,596,978
       Net unrealized market depreciation                           (73,449)
       Net amount applicable to investors                       $67,020,935

(d) OTHER INFORMATION

    Selected data for a Unit of the Trust during the period:

                                                       For the period from
                                                         March 16, 1994
                                                        (date of deposit)
                                                      to February 28, 1995
       Net investment income distributions
         during period                                    $    .0244
       
       Net asset value at end of period                   $    .9676
       
       Trust Units outstanding at end of period           69,500,000
       
       
       
       
       
       
       
       
       
       
       
       
                                        F-6


<PAGE>
<TABLE>
<CAPTION>
                                   SCHEDULE OF PORTFOLIO SECURITIES
                                                   
                                 DEAN WITTER SELECT GOVERNMENT TRUST
                                        U.S. TREASURY SERIES 7
                                                   
                                          February 28, 1995



Port- 
folio                                                Face      Coupon                            Market
 No.      Title of Securities Contracted for<F4>    Amount      Rate     Maturity Date        Value<F5><F6>

  <S>    <C>                                     <C>             <C>         <C>              <C>
  1.     U.S. Treasury Note                      $13,900,000     4.625%      02/15/96         $13,662,866

  2.     U.S. Treasury Note                       13,900,000     6.250       01/31/97          13,772,398

  3.     U.S. Treasury Note                       13,900,000     5.625       01/31/98          13,427,400

  4.     U.S. Treasury Note                       13,900,000     5.500       02/28/99          13,177,895

  5.     U.S. Treasury Note                       13,900,000     5.500       04/15/00          12,980,376

                                                 $69,500,000                                  $67,020,935

                       

<F4>None of the Securities is redeemable by operation of optional call provisions.

<F5>The market value of the Securities as of February 28, 1995 was determined by the Evaluator on the 
basis of bid side evaluations for the Securities at such date.

<F6>At February 28, 1995 the net unrealized market depreciation of Securities was comprised of the 
following:

         Gross unrealized market appreciation           $ 44,698

         Gross unrealized market depreciation           (118,147)

         Net unrealized market depreciation             $(73,449)

    The aggregate cost of the Securities to the Trust for Federal income tax purposes was $67,094,384 
at February 28, 1995.














                                                 F-7
</TABLE>

<PAGE>

   
                    CONTENTS OF REGISTRATION STATEMENT


            This registration statement comprises the following
            documents:

            The facing sheet.

            The Cross Reference Sheet.

            The Prospectus.

            The signatures.

            Consents of the Evaluator, Independent Auditors and
            Standard & Poor's; all other consents were previously
            filed.

            The following exhibits:

            23.   1a.   Consent of Kenny S&P Evaluation Services, a
                        division of J.J. Kenny Co., Inc.

                  1b.   Consent of Independent Auditors.

                  1d.   Consent of Standard & Poor's, a division of
                        The McGraw-Hill Companies.

            27.         Financial Data Schedule.



                           FINANCIAL STATEMENTS

1.    Statement of Financial Condition, Statement of Operations
      and Statement of Changes in Net Assets of the Trust, as
      shown in the Prospectus.






      

<PAGE>


                            CONSENT OF COUNSEL


            The consent of Counsel to the use of its name in the
prospectus included in this Registration Statement is contained
in its opinion filed as Exhibit EX-5 to this Registration
Statement.












      

<PAGE>


                                SIGNATURES

            Pursuant to the requirements of the Securities Act of
1933, the registrant, Dean Witter Select Government Trust, U.S.
Treasury Series 7, certifies that it meets all of the
requirements for effectiveness of this Registration Statement
pursuant to Rule 485(b) under the Securities Act of 1933 and
has duly caused this Post-Effective 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 1st day of June, 1995.

                        DEAN WITTER SELECT GOVERNMENT TRUST,
                        U.S. TREASURY SERIES 7
                                  (Registrant)

                        By:  DEAN WITTER REYNOLDS INC.
                                       (Depositor)

                                    Thomas Hines               
                                    Thomas Hines
                                    Authorized Signatory

            Pursuant to the requirements of the Securities Act of
1933, this Post-Effective 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 1st day of June, 1995.

                                          DEAN WITTER REYNOLDS INC.

Name                          Office

Philip J. Purcell             Chairman and Chief   )
                              Executive Officer    )
                              and Director<F33>    )

                                                    By:
                                                       Thomas Hines       
                                                       Thomas Hines
                                                       Attorney-in-fact<F33>

___________________
<F33> 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 File No. 33-56389.


      

<PAGE>


Name                          Office

Richard M. DeMartini          Director<F33>

Nancy S. Donovan              Director<F33>

Robert J. Dwyer               Director<F33>

Christine A. Edwards          Director<F33>

James F. Higgins              Director<F33>

Stephen R. Miller             Director<F33>

Richard F. Powers             Director<F33>

Philip J. Purcell             Director<F33>








___________________
<F33> 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 File No. 33-56389.
    



<PAGE>


                               EXHIBIT INDEX


EXHIBIT NO.       TITLE OF DOCUMENT                                        

23.   1a.         Consent of Kenny S&P Evaluation Services,
                  a division of J.J. Kenny Co., Inc.              

      1b.         Consent of Deloitte & Touche LLP          

      1d.         Consent of Standard & Poor's, a division of
                  The McGraw-Hill Companies           

27.               Financial Data Schedule











<PAGE>


                                                             Exhibit 23.1a.


               Letterhead of KENNY S&P EVALUATION SERVICES,
                    A Division of J.J. Kenny Co., Inc.

                                                               June 1, 1995



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

                   Re:  Dean Witter Select Government Trust,
                        U.S. Treasury Series 7              

Gentlemen:

            We have examined the post-effective Amendment to the
Registration Statement File No. 33-49975 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 Amendment 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



      

<PAGE>
                                                         Exhibit 23.1b.









                      CONSENT OF INDEPENDENT AUDITORS

We consent to the use of our report dated May 22, 1995, accompanying the 
financial statements of the Dean Witter Select Government Trust U.S. 
Treasury Series 7 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




June 1, 1995
New York, New York



<PAGE>


                                                             Exhibit 23.1d.
                     Letterhead of Standard & Poor's,
                  A division of The McGraw-Hill Companies

                                                               June 1, 1995



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

            Re:   Dean Witter Select Government Trust,
                  U.S. Treasury Series 7
                  (SEC Reg. # 33-49975)               

Gentlemen:

            It is our understanding that you have filed with the
Securities and Exchange Commission a first Post Effective
Amendment on the above captioned fund, SEC file number
33-49975.

            Because the portfolio is composed solely of U.S.
Treasury Obligations fully guaranteed as to principal and
interest by the full faith and credit of the United States, we
reaffirm the assignment of an "AAA" rating to the units of the
fund.

            You have permission to use the name of Standard &
Poor's, a division of The McGraw-Hill Companies 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.  Standard & Poor's
reserves the right to advise its own clients, subscribers, and


      

<PAGE>

                                    -2-



the public of the rating.  Standard & Poor's 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.  Standard & Poor's 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, a division of The McGraw-Hill
Companies in connection with the rating assigned to the units
in the post-effective amendment referred to above.  However,
this letter should not be construed as a consent by us, within
the meaning of Section 7 of the Securities Act of 1933, to the
use of the name of Standard & Poor's, a division of The
McGraw-Hill Companies 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
                                    Sanford B. Bragg
                                    Managing Director



<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 PORTFOLIO
                             SERIES 7 AND IS QUALIFIED IN ITS
                             ENTIRETY BY REFERENCE TO SUCH FINANCIAL
                             STATEMENTS

<RESTATED>                   

<SERIES>                     

<NAME>                       DEAN WITTER SELECT GOVERNMENT TRUST     
                             U.S. TREASURY PORTFOLIO SERIES 

<NUMBER>                     7

<MULTIPLIER>                 1

<PERIOD-TYPE>                OTHER

<FISCAL-YEAR-END>            Feb-28-1995

<PERIOD-START>               Mar-16-1994

<PERIOD-END>                 Feb-28-1995

<INVESTMENTS-AT-COST>        67,094,384 

<INVESTMENTS-AT-VALUE>       67,020,935 

<RECEIVABLES>                460,687 

<ASSETS-OTHER>               78,558 

<OTHER-ITEMS-ASSETS>         0      

<TOTAL-ASSETS>               66,837,686 

<PAYABLE-FOR-SECURITIES>     0 

<SENIOR-LONG-TERM-DEBT>      0 

<OTHER-ITEMS-LIABILITIES>    313,915

<TOTAL-LIABILITIES>          313,915  

<SENIOR-EQUITY>              0 

<PAID-IN-CAPITAL-COMMON>     67,094,384

<SHARES-COMMON-STOCK>        69,500,000 

<SHARES-COMMON-PRIOR>        500,000 

<ACCUMULATED-NII-CURRENT>    225,330 

<OVERDISTRIBUTION-NII>       0 

<ACCUMULATED-NET-GAINS>      0 

<OVERDISTRIBUTION-GAINS>     0 

<ACCUM-APPREC-OR-DEPREC>     (73,449)

<NET-ASSETS>                 67,246,265 

<DIVIDEND-INCOME>            0 

<INTEREST-INCOME>            2,160,116   

<OTHER-INCOME>               174,943

<EXPENSES-NET>               82,599 

<NET-INVESTMENT-INCOME>      2,252,460

<REALIZED-GAINS-CURRENT>     0         

<APPREC-INCREASE-CURRENT>    (73,449)

<NET-CHANGE-FROM-OPS>        2,179,011

<EQUALIZATION>               0 

<DISTRIBUTIONS-OF-INCOME>    2,027,130 

<DISTRIBUTIONS-OF-GAINS>     0 

<DISTRIBUTIONS-OTHER>        0 

<NUMBER-OF-SHARES-SOLD>      69,000,000 

<NUMBER-OF-SHARES-REDEEMED>  0

<SHARES-REINVESTED>          0 

<NET-CHANGE-IN-ASSETS>       66,748,859

<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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