Photograph of three United States Army Air Corps Douglas O-38 aircraft in flight at the National Air Races in Cleveland, Ohio, April 14, 1931. Inscription: "U.S. Army. Douglas O38's. LM."Inscription on verso: "Douglas observation planes. Cleveland,…
Photograph of five U.S. Army Air Corps Douglas O-38 aircraft in flight over mountainous terrain, February 6, 1931. Caption: "(O38 92-P-115) (2-6-31) (12-4100)."
Photograph of five U.S. Army Air Corps Douglas O-38 aircraft in flight over mountainous terrain, February 6, 1931. Caption: "(O37 92-P-115) (2-6-31) (12-4100)."
Photograph of five U.S. Army Air Corps Douglas O-38 aircraft in flight over mountainous terrain, February 6, 1931. Caption: "(O39-92P-115) (2-6-31) (12-4100)."
Photograph of a California National Guard Douglas O-38 aircraft (fuselage number 7) in flight, November 8, 1936. Caption: "(O-92P-115) (11-8-36) (10-5000) O-38 in flight."