Training Booklets, Set of 3: Upper, Lower Ball, and Tail Turrets A4 Skyhawk It has a date of

It has a date of manufacture stamped June 1952

The Mark 18 sight was used in some turrets of US Navy aircraft as well as in the cockpit of the Korean War-era F-86 Sabrejet fighter

A volume of air enters the mouth of the tube

The C-8 was illuminated with a small 3V lamp knob in the upper right corner

Training Booklets, Set of 3: Upper, Lower Ball, and Tail Turrets A4 Skyhawk It has a date ofThis listing is for a set of 3 original WWII era armorer training booklets for gun turrets used in the heavy bombers B 17 and B 24 compiled by the Air Forces Technical School, 2nd Echelon Power Operated gun Turret Division, Lowery Field Colorado, February 1943. Includes: 1) Sperry Upper Turret, 13 pages 2) Sperry Lower Ball Turret, 11 pages 3) Consolidated Tail Turret, 14 pages Each booklet reviews turret installation, service, maintenance,