Photographic postcard of the Christofferson 1914 Tractor aircraft in low flight over a field, Bishop, California, circa 1914.Inscription: "Dedication of the Exposition Way / Christofferson Tractor Biplane / Bishop, Cal. / 1875 / Forbes."
Photographic postcard of a man, possibly Silas Christofferson, working on the propellor of the Christofferson 1914 Tractor aircraft, Bishop, California, circa 1914.Inscription: "Forbes / Christopher Tractor Biplane / Bishop, Cal. 1878."
Photographic postcard the Christofferson 1914 Tractor aircraft, Bishop, California, circa 1914. A man is seated in the cockpit.Inscription: "Forbes / Christofferson Tractor Biplane / Bishop, Cal. 1889 / Dedication of Exposition the Way."
Aerial photograph of an airport in Bishop, California, May 7, 1935.Inscription: "(O-I-89K-23)(5-7-35-2P)(12-1500). Airport, Bishop, Calif."Stamped on verso: "Official Photo. Credit to be given 23rd Photo Section. Air Corps, U.S. Army."Item from the…