Sale 2443 Lot 307

(AVIATION ENGINEERING)
Album entitled The Engineering Division of the U.S. Air Servicewith approximately 65 photographs documenting the construction and testing of early United States Air Force aircraft.
With images showing engine and weapon components, prototype model constructions, aircraft (both on land and in flight), aerial views of the Earth, and the first successful quadrotor helicopter known as the de Bothezat helicopter. Silver prints, the images measuring approximately 6 1/2x9 inches (16.5x22.9 cm.), mounted recto only to black pages, each with an interleaving vellum cover sheet with extensive typed titles and captions. Oblong 4to, gilt-lettered black leatherette with a twin-bolt binding. 1924-25


Estimate $1,000 - 1,500