Rule 497(d)
DEAN WITTER SELECT MUNICIPAL TRUST
INSURED CALIFORNIA INTERMEDIATE TERM PORTFOLIO SERIES 11
DELAWARE PORTFOLIO SERIES 13
MARYLAND PORTFOLIO SERIES 15
SUPPLEMENT TO PROSPECTUS
DATED JANUARY 16, 1996
The sales charge in the secondary market will
reflect different rates depending upon the maturities of the
various underlying Securities as follows:
(as percent of bid (as percent of
Time to Maturity side evaluation) Offering Price
Less than 1 year 0% 0%
Over 1 year to 2 years 0.756% 0.75%
Over 2 years to 3 years 1.523% 1.50%
Over 3 years to 6 years 2.564% 2.50%
Over 6 years to 10 years 3.627% 3.50%
Over 10 years to 14 years 4.712% 4.50%
15 years and over 5.820% 5.50%
The prospectus included in the Registration Statement for
Dean Witter Select Municipal Trust, Insured California
Intermediate Term Portfolio Series 11, Delaware Portfolio Series
13 and Maryland Portfolio Series 15 is hereby incorporated by
reference.
