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- Source is exactly "The William E. Boeing Sr. Papers (2005-10-06-B), Box 3, Folder 88"
[Letter and first flight air mail cover "carried on the 'Boeing Hornet Shuttle,'" August 27, 1929]
![[Letter and first flight air mail cover "carried on the 'Boeing Hornet Shuttle,'" August 27, 1929]](https://digitalcollections.museumofflight.org/files/square_thumbnails/850c1ecd2f92d4b6a7c8f72142bf0cb6.jpg "[Letter and first flight air mail cover "carried on the 'Boeing Hornet Shuttle,'" August 27, 1929]")
Letter and first flight air mail cover "carried on the 'Boeing Hornet Shuttle,'" August 27, 1929. Letter was carried on "the first plane to carry mail while attempting one or more round-trip non-stop flights over the New York-San Francisco air mail…