[Salmson 2 A2 aircraft of 90th Aero Squadron in flight]

Photograph of a Salmson 2 A2 aircraft (fuselage number 4) of the 90th Aero Squadron, U.S. Army Air Service, in flight, circa 1917-1919.

Inscription on album page: "Salmson. French and U.S. observation plane."

Part of Album One from the Nancy Harkness Collection of World War I Photograph Albums, circa 1914-1919.

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