Photograph of a United States Militia Bureau Douglas O-31 aircraft parked at an airfield, likely at the National Air Races in Ohio, circa 1930s.Inscription: "U.S. Militia Bureau. Douglas O-31B."Inscription on verso: "Douglas O-31B Conqueror 650…
Photograph of several United States Army Air Corps aircraft, including a Douglas O-25A (front) and Douglas O-2H (back, fuselage number 14), parked at an airfield, likely at the National Air Races in Ohio, circa 1930s.Inscription: "U.S. Army. Douglas…
Photograph of a United States Army Air Corps Douglas O-25C aircraft (fuselage number A.C. 30-160) parked at an unidentified airfield, likely at the National Air Races in Ohio, circa 1930s. Inscription: "U.S. Army. Douglas O-25C."Item from page 23 of…
Photograph of a United States Army Air Corps Douglas O-25C aircraft (fuselage number 154) at an unidentified airfield, likely at the National Air Races in Ohio, circa 1930s. Two crewmembers sit in the plane.Inscription: "U.S. Army. Douglas…
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:…
Photograph of a United States Army Air Corps Douglas O-38B aircraft (tail number 2) parked at an airfield, likely at the National Air Races in Ohio, circa 1930s.Inscription: "U.S. Army. Douglas O-38B"Inscription on verso: "Douglas O-38B. PW Hornet…
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 United States Army Air Corps Douglas BT-2B aircraft (fuselage number A.C. 31-1) parked at an airfield, likely at the National Air Races in Ohio, circa 1930s. The inscription notes that this plane belonged with Brigadier General Don…
Photograph of several United States Army Air Corps Douglas O-2H aircraft parked at the National Air Races in Cleveland, Ohio, May 21, 1931. Inscription: "U.S. Army. Douglass [Douglas] O-2H. LM."Inscription on verso: "Army Douglas's. Cleveland, Ohio.…
Photograph of several United States Army Air Corps aircraft, including Curtiss XO-16 Falcons (left) and Douglas O-2Hs (right), parked at the National Air Races in Cleveland, Ohio, May 21, 1931. Inscription: "U.S. Army. Curtiss 'Falcons.' Douglas…