[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 route" and is addressed to Mr. W. E. Boeing, Jr., Seattle, Washington. One typed page signed by William E. Boeing and envelope.

Stamped: "First Transcontinental Non-Stop Flight with the Air Mail in the 'Boeing-Hornet Shuttle' Aug.-Sept. 1929."