Original U.S. WWII Sperry Aircraft Gunsight K-13 Compensating Sight Russian Issue Equipment The blade is in very

The blade is in very good condition

complete with a depot marking and date:

Under the unequal treaties

and the small details really come together here

Original U.S. WWII Sperry Aircraft Gunsight K-13 Compensating Sight Russian Issue Equipment The blade is in veryOriginal Item: Only One Available. The K 13 Compensating Gunsight, made by Sperry, is an electrically powered gunsight designed to compensate for altitude and airspeed. Typically mounted on the rear housing of a . 50 caliber machine gun from a side waist gunner position in the aircraft. Used in Boeing B 17 Flying Fortress and Consolidated B 24 Liberator bombers during WW2. It was a late war innovation that used the aircraft altitude and speed with the