Original U.S. WWII Sperry Aircraft Gunsight K-13 Compensating Sight Russian Issue Equipment typically used for purposes such

typically used for purposes such heritage aviation displays and aerial sightseeing

There are no cracks in the stock

and the small details really come together here

which usually has black scabbards

Original U.S. WWII Sperry Aircraft Gunsight K-13 Compensating Sight Russian Issue Equipment typically used for purposes suchOriginal 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