United Airport brochure and first flight air mail cover addressed to William E. Boeing, Seattle, Washington, April 30, 1931.Stamped: "First Flight A.M. Route 4 from United Airport, Burbank, California."Stamped: "First Dispatch - Airmail Field Post…
Waybill of mail dispatched from Vancouver, B.C. to Seattle, Washington by hydro-airplane at 12:45pm, March 3, 1919. Includes handwritten note: "Received Seattle P.O. March 3, 1919, 4:20pm - C. M. Perkins, Supt. Mail." One typed page.
Photographic portrait of Wilhelm Böing, father of William E. Boeing, circa 1880s.Stamped on verso: "Angell, Photographer, East Saginaw, Mich. Opposite Everett House."