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                                              Rule 497(j)
                                              Reg. No. 33-48855
                                                       33-25184
                                                  

Pursuant to Rule 497(j) promulgated under the Securities Act of
1933, the Registrant, Dean Witter Select Municipal Trust, Insured
California Series 60 and Long Term Portfolio Series 123 hereby
certifies as follows: 

1)   the form of prospectus that would have been filed under
     paragraph (b) of Rule 497 does not differ from that con-
     tained in the most recent amendment to the registration
     statement, and

2)   the text of the said amendment to the registration state-   
     ment has been filed electronically.

                         DEAN WITTER SELECT MUNICIPAL TRUST,
                         INSURED CALIFORNIA SERIES 60
                         LONG TERM PORTFOLIO SERIES 123
                                  (Registrant)
                                  

    
                                   By:  Dean Witter Reynolds Inc.
                                        (Depositor)

                                                              
                                                              
                                        Thomas Hines
                                        Thomas Hines             
                                        Authorized Signatory    
                                       
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D. C.  20549



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