Gun Sight, Ball Turret, Type K-4 Sperry, B-17, B-24 RAAF This offer is for an

This offer is for an Distance Indicator

Compass Scale

in its original bakelite case

22317 as used in the WWII-era JU-87 Stuka and JU-88 dive bombers and some ME 110 fighters of the German Luftwaffe

and shutter speed is adjustable from 125 to 500

Gun Sight, Ball Turret, Type K-4 Sperry, B-17, B-24 RAAF This offer is for anThis is an electro mechanical, automatic Type K 4 Computing Gun Sight used in the Sperry ball turret in WWII era heavy bombers such as the B 17 Flying Fortress and B 24 Liberator. Mounted within the ball turret, it hung from the 'ceiling' of the turret just in front of the forehead of the turret gunner (see illustration from turret manual). The gunner took aim at his target by looking through the glass screen mounted on an optic head the bottom of the