Plain Cancelled Envelopes

Four envelopes with single stamps, “First Day of Issue” cancellation and postmarks, mounted on #6-3/4 (6-1/2" x 3-11/16") envelopes.  No address on any envelope. First day cancelled envelopes like these are valued by ‘add-on’ companies, who will add an appropriate cachet sometimes years after the first day date.

first posted 1/10/2009