International air mail cover addressed to Mrs. William E. Boeing, Seattle, Washington, from R. Ortman, Paris, France, August 7, 1928. Stamped: "Par Avion."
Air mail cover addressed to William E. Boeing, Seattle, Washington, from Black and Bigelow, Incorporated, New York, August 2, 1928. Commemorates the "inauguration trip of the five cent air mail."Stamped: "Inauguration trip of the five cent air mail."
First flight air mail cover addressed to William E. Boeing, Chicago, Illinois, July 1, 1927. Signed by pilot Hugh Barker.Stamped: "First Flight Under Contract Chicago - San Francisco - Transcontinental Air Mail Route. Salt Lake City, Utah."
First flight air mail cover addressed to William E. Boeing, Chicago, Illinois, July 1, 1927.Stamped: "First Flight Under Contract - Chicago to San Francisco - Transcontinental Air Mail Route, Omaha, Nebraska."
First flight air mail cover addressed to Master Bebo Boeing, Seattle, Washington, July 1, 1927. Stamped: "First Flight Under Contract - Chicago to San Francisco - Transcontinental Air Mail Route, Omaha, Nebraska."
Air mail cover addressed to Mr. O. W. Tupper, Seattle, Washington, February 2, 1927. Includes postmark stamps from Washington, D.C., Chicago, Illinois, and Pasco, Washington. One envelope.
Letter to Editor, Colonist newspaper, Victoria, B.C., from William E. Boeing, March 19, 1919. Requests that they return the letter as a souvenir of first international mail between Victoria and Seattle, Washington. One handwritten page and envelope.
Letter to "Our Neighbors Across the Line" from Seattle Mayor Ole Hanson, February 15, 1919. Expresses friendship, well-wishes, and a united front "against Hunnism." Letter was carried on the first international airmail flight from Vancouver, B.C. to…