Photograph of Junkers K 47 and Douglas O-2 aircraft, Hangzhou, China, 1931. Inscription: "Junkers K-47. O-2. Hungjao. 1931."Part of a photograph album related to Julius A. Barr's personal life and flying career in the United States and China, circa…
Photograph of a Douglas O-2 aircraft of the 16th Observation Squadron, U.S. Army Air Corps, at an unidentified airfield, circa 1926-1927. The squadron emblem (pair of binoculars) is visible on the fuselage.
Inscription on album page: "Douglas…