Original U.S. WWII Sperry Aircraft Gunsight K-13 Compensating Sight Spanish Flags The six surviving tanks arrived

The six surviving tanks arrived at the main gate at 10:00 and began their attack

I passed out again after I pulled my zip cord

The colors are vibrant and the eyes feel alive

It 's stock is walnut

Karl Heisler

Original U.S. WWII Sperry Aircraft Gunsight K-13 Compensating Sight Spanish Flags The six surviving tanks arrivedOriginal 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