Photograph of the McDonnell Model 1 Doodlebug aircraft, Mitchel Field, New York, circa 1929. The aircraft was an entry in the Guggenheim Safe Aircraft Competition.Typed caption on verso: "McDonnell & Associates entry in the Daniel Guggenheim Safe…
Photograph of the Handley Page H.P.39 Guggenheim aircraft, Mitchel Field, New York, circa 1929. The aircraft was an entry in the Guggenheim Safe Aircraft Competition.Typed caption on verso: "The Handley Paige [sic], British entry and winner of the…