First flight air mail cover addressed to Mrs. William E. Boeing, Seattle, Washington, June 22, 1940. Includes brief note informing Bertha Boeing to keep the cover if interested and return it if not.
Stamped cachet: "Seattle-Juneau, U.S. Air Mail…
Air mail cover addressed to William E. Boeing, Seattle, Washington, May 20, 1938. Includes a stamped cachet with an image of Glenn L. Martin.Stamped: "Macksburg, IA. Birthplace of Glenn L. Martin (1886-), Designer of Martin Airplanes - Air Mail Week…
First flight air mail cover addressed to William E. Boeing, Seattle, Washington, May 19, 1938. Stamped cachet: "Aviation History, 1911-1938 - Glenn L. Martin Flies First Plane into Clay Center, Nebraska, 1911. 1911 - Pusher type plane. 1938 - Glenn…
First flight air mail cover addressed to Hudson's Bay Company, Vancouver, B.C., October 18, 1938.Stamped: "First day cover - Via air mail from San Francisco."
First flight air mail cover addressed to Bill Boeing, Jr., Honolulu, Hawaii, May 28, 1937.Stamped cachet: "Primeiro Voo – Correio - Transpacific - Macau-USA."
First flight air mail cover addressed to Bill Boeing, Jr., Seattle, Washington, December 5, 1935. Includes one piece of Halekulani Bungalows (Hawaii) stationery.Stamped cachet: "First Flight - Transpacific Route F.A.M. Route 14 - Honolulu-San…
First flight air mail cover addressed to William E. Boeing, Seattle, Washington, from Inter-Island Airways, Ltd., Honolulu, Hawaii, December 5, 1935.Stamped cachet: "First Flight - Transpacific Route F.A.M. Route 14 - Honolulu-San Francisco (Alameda…
First flight air mail cover addressed to Mrs. William E. Boeing, Seattle, Washington, October 5, 1935.
Stamped: "First Flight - Transpacific eastbound from Guam - Pan American Clipper."