A stamped envelope or postal stationery envelope (PSE) is an envelope with a printed or embossed indicium indicating the prepayment of postage. It is a form of postal stationery, and a neat addition to any stamp collection.
1981 18c Stamped Envelopes and Wrappers - violet
1973 6c Postal Card - Liberty
1988 8.4c Stamped Envelopes and Wrappers - US Frigate Constellation
1972 6c Postal Card - Monument Valley
1981 Postal Card - Non-denom Eagle
1994 19c Postal Card - Canyon de Chelly
1989 15c Postal Card - The Desert
20c brown 1981
1972 6c Postal Card - USF Constellation
Stamped Envelopes