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."
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 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 Mr. Milo [Rauek?], Honolulu, Hawaii, October 8, 1934.Stamped: "First Flight - United States Air Mail - Wailuku, Maui, T.H. [Territory of Hawaii], USA."
First flight air mail cover addressed to William E. Boeing, Seattle, Washington, from the Glenn L. Martin Company, Cleveland, Ohio, July 1, 1934.Stamped: "Via Air Mail - On first trip of through schedule involving night flying on Transcontinental Air…
First flight air mail cover addressed to Mr. L. G. Blackman, Honolulu, Hawaii, October 8, 1934.Stamped: "First Flight - United States Air Mail - Hilo, Hawaii, T.H. [Territory of Hawaii], USA."
First flight air mail cover addressed to Colonel L. G. Blackman, Honolulu, Hawaii, October 8, 1934.Stamped: "First Flight - United States Air Mail – Honolulu, Oahu, T.H. [Territory of Hawaii], USA."
First flight air mail cover addressed to Mrs. W. W. Crocker, Burlingame, California, April 22, 1935.Stamped: "First Flight - Pan American Clipper - Hawaii-California."Stamped: "First Flight - Pan American Clipper - California-Hawaii."
First flight air mail cover addressed to A. R. Nylen, Honolulu, Hawaii, October 5, 1935.
Stamped: "First Flight - Transpacific eastbound from Guam - Pan American Clipper."
First flight air mail cover addressed to Bill Boeing, Jr., Seattle, Washington, October 5, 1935.
Stamped: "First Flight - Transpacific eastbound from Guam - Pan American Clipper."