[Douglas O-2H]

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. Dayton 1930."

Item from page 25 of the LeRoy Milliren National Air Races photograph album, circa 1920s-1930s. Album contains one hundred ninety-eight (198) black-and-white photographs taken at the air races during this time period.