OBJECT SHOWCASE: U.S. Airmail Stamped Envelopes

Post Office Department airmail pilots never carried U.S. airmail stamped envelopes. The first U.S. air post stamped envelopes became available to the public on January 12, 1929. These stamped envelopes carried the red and blue border design that marked U.S. airmail stationery for most of the 20th century.

Here are some examples of U.S. airmail stamped envelopes