Photograph of three Douglas O-2H aircraft of the Ohio National Guard parked at the National Air Races in Dayton, Ohio, circa 1930. Inscription: "U.S. Army. Dayton. Douglass [Douglas] O-2H. LM."Inscription on verso: "3 Observation ships of O.N.G.…
Photograph of a Douglas O-2H aircraft of the Ohio National Guard on display at the National Air Races in Dayton, Ohio, circa 1930. An unidentified man looks over the plane.Inscription: "U.S. Army. Dayton. Douglas O-2H"Inscription on verso: "Douglas 2…
Photograph of a Douglas O-2H aircraft of the Ohio National Guard on display at the National Air Races in Cleveland, Ohio, circa 1930. An unidentified man poses with the plane.Inscription: "U.S. Army. Cleveland. Douglas O-2H. LM."Inscription on verso:…