[Curtiss P-6 Hawks and Boeing P-12Ds]

Photograph of United States Army Air Corps aircraft parked at the National Air Races in Cleveland, Ohio, April 7, 1931. The planes on the left are Curtiss P-6 Hawks, and the planes on the right are Boeing P-12Ds (Model 227).

Inscription: "U.S. Army. Cleveland. 'Hawks.' P-12D. LM."

Inscription on verso: "Curtiss Hawk's (left). Boeing P-21D's (right). Cleveland Apr. 7, 1931."

Item from page 10 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.