Browse Items (1 total)
- Source is exactly "The William E. Boeing Sr. Papers (2005-10-06-B), Box 4, Folder 16"
[Air mail cover addressed to William E. Boeing, Seattle, Washington, May 20, 1938]
![[Air mail cover addressed to William E. Boeing, Seattle, Washington, May 20, 1938]](https://digitalcollections.museumofflight.org/files/square_thumbnails/0de530e3779baa846ce9a130a8cd8f3b.jpg "[Air mail cover addressed to William E. Boeing, Seattle, Washington, May 20, 1938]")
Air mail cover addressed to William E. Boeing, Seattle, Washington, May 20, 1938. Includes a stamped cachet with an image of Glenn L. Martin.Stamped: "Macksburg, IA. Birthplace of Glenn L. Martin (1886-), Designer of Martin Airplanes - Air Mail Week…