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• Text (2)

• covers (philately) (2)
• envelopes (2)
• first flight covers (1)

• In copyright (2)

• Air mail service (2)
• Boeing, William Edward, 1881-1956 (2)
• Douglas Aircraft Company (1)
• Glenn L. Martin Company (1)
• Martin (Glenn L.) JRM Mars Family (1)

2 results

[Demonstration flight air mail cover addressed to William E. Boeing from Douglas Aircraft Company, October 1, 1946] (Item)

Demonstration flight air mail cover addressed to William E. Boeing, Seattle, Washington, from the Douglas Aircraft Company, Santa Monica, California, October 1, 1946.Stamped cachet: "Demonstration flight - Flying Post Office - En route - Los Angeles - New York - Boston - U.S. Air Mail."

[First flight air mail cover addressed to William E. Boeing from Glenn L. Martin Company, July 3, 1942] (Item)

First flight air mail cover addressed to William E. Boeing, Seattle, Washington, from the Glenn L. Martin Company, Baltimore, Maryland, July 3, 1942.Stamped cachet: "First Flight - This cover carried on first official flight of the 'Mars,' built by the Martin Co. for the U.S. Navy - World's Largest Flying Ship."