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., Claremont, California, from William E. Boeing, June 20, 1940.Stamped cachet: "First Flight F.A.M. 20. Seattle, Washington. U.S. Air Mail."
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., Pasadena, California, from William E. Boeing, May 3, 1938.Stamped cachet: "United States Air Mail - Juneau-Fairbanks - First Flight."
First flight air mail cover addressed to Bill Boeing, Jr., Pasadena, California, from William E. Boeing, May 8, 1938.Stamped cachet: "United States Air Mail - Fairbanks-White Horse - First Flight."
First flight air mail cover addressed to Bill Boeing, Jr., Seattle, Washingotn, from William E. Boeing, May 8, 1938.Stamped cachet: "First Official Air Mail Flight - White Horse, Canada-Juneau, Alaska."
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 Bill Boeing, Jr., Seattle, Washington, from William E. Boeing, May 3, 1938.Stamped cachet: "United States Air Mail - Juneau-White Horse - First Flight."
First flight air mail cover addressed to Bill Boeing, Jr., Seattle, Washington, from William E. Boeing, May 8, 1938.Stamped cachet: "United States Air Mail - Fairbanks-White Horse - First Flight."
First flight air mail cover addressed to Bill Boeing, Jr., Seattle, Washington, June 21, 1947.Stamped cachet: "First Flight A.M. 3 from Bozeman, Montana - Northwest Orient Airlines."Stamped cachet: "U.S. Air Mail, First Flight, Bozeman, Mont."Stamped…