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- Source is exactly "The William E. Boeing Sr. Papers (2005-10-06-B), Box 4, Folder 33"
[Air mail cover addressed to William E. Boeing, Seattle, Washington, May 29, 1953]
![[Air mail cover addressed to William E. Boeing, Seattle, Washington, May 29, 1953]](https://digitalcollections.museumofflight.org/files/square_thumbnails/fd5c355405f31eaed588c6a2b1c88cfa.jpg "[Air mail cover addressed to William E. Boeing, Seattle, Washington, May 29, 1953]")
Air mail cover addressed to William E. Boeing, Seattle, Washington, May 29, 1953.Stamped: "First day of issue - American Air Mail Society - Convention Station."