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 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 A. R. Nylen, Honolulu, Hawaii, October 5, 1935.
Stamped: "First Flight - Transpacific eastbound from Guam - Pan American Clipper."