Series IV - Airmail, 1933-1934

Air mail envelope commemorating pilots who died while delivering the mail, May 15, 1934. Addressed to Harold B. Wright in Hutchinson, Kansas. Text on envelope: "In memorium. U.S. Army. Pilots who died flying the mail. Memorial Day, 1934. Sponsored by…

Air mail envelope commemorating the first day of the U.S. Army Air Corps taking over air mail deliveries, February 19, 1934. Addressed to Cal. E. D. Adams in San Francisco, California. Text on envelope: "The Army flies the mail. First day cover."

Air mail envelope commemorating the 15th anniversary of air mail service, May 15, 1933. Addressed to the National Cachet Publishing Service in Brooklyn, New York. Text from original exhibit label: "Airmail commemorating fifteen years of airmail…