Show special cachet to mark 15 navy anniversary As a feature of the observance of the anniversary of the es of the navy depart ment on april 30 1948 a special sesquicentennial cachet will be hand stamped that day on callec tors envelopes previously forward ed to the sesquicentennial desk office of public relations navy de apartment part ment washington D C the special navy cachet which shows the official navy depart ment seal with the word centennial above it and the dates 1798 1948 below it will be affix ed to the lower left area of self addressed stamped envelope sent under separate cover and received in the navy department by april 29 in addition to bearing ample postage collectors envelopes must be preaddressed in the lower right area |