SEARS MUNICIPAL TRUST DELWARE PORTFOLIO SERIES 12, 497J, 1994-07-21

SEARS MUNICIPAL TRUST DELWARE PORTFOLIO SERIES 12
497J, 1994-07-21

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                                             Rule 497(j)
                                             Reg. No. 33-49221
                                             Reg. No. 33-47084    
                              

Pursuant to Rule 497 (j) promulgated under the Securities Act of
1933, the Registrant, Dean Witter Select Municipal Trust,
National Portfolio Series 126 and Delaware Portfolio Series 12,
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
     contained in the most recent amendment to the registration
     statement, and

2)   the text of the said amendment to the registration statement
     has been filed electronically.


                    DEAN WITTER SELECT MUNICIPAL TRUST,
                    NATIONAL PORTFOLIO SERIES 126
                    DELAWARE PORTFOLIO SERIES 12
                              
                    By:  Dean Witter Reynolds Inc.
                         (Depositor)


                         Michael D. Browne
                         Michael D. Browne
                         Authorized Signatory