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."
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."
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 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., Honolulu, Hawaii, May 28, 1937.Stamped cachet: "Primeiro Voo – Correio - Transpacific - Macau-USA."