Photograph of the Aerial Experiment Association Cygnet II aircraft on an iced-over lake, 1909.Caption on envelope: "Cygnet II / Bell Tetrahedral / 1909."
Photograph of a Dayton Wright DH-4 aircraft (tail number A29152), circa 1910s-1930s.Inscription: "De Haviland [sic] / 18."Caption on envelope: "Dayton-Wright DH-4 / 103."
Photograph of an Imperial Airways De Havilland D.H.66 Hercules aircraft, circa 1930s-1940s. Part of a Junkers Ju 52/3mg aircraft (fuselage designation D-AHAL) is visible in the background.Inscription on envelope: "DeHavilland DH 66 Hercules /…
Photograph of a De Havilland D.H.4 ambulance aircraft (fuselage designation A.S. 68188), circa 1910s-1930s. A compartment on the fuselage is open to show a rescue basket.Caption on envelope: "DH-4 ambulance / 3/4 rear."