Altimeter, Sensitive, Type C-12, 50,000 ft, US Army Air Force WWII A-26 The aluminum semi-circle plate in

The aluminum semi-circle plate in the center is marked in minutes

The first ~200 pages describe various aspects of air services

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and ordnance terminal velocity

Altimeter, Sensitive, Type C-12, 50,000 ft, US Army Air Force WWII A-26 The aluminum semi-circle plate inHere is an early WWII era Sensitive Altimeter, Air Corps US Army Type C 12, made by Conn. The C 12 Altimeter was used across all aircraft of the Air Corps US Army, including heavy bombers B 17 and B 24, medium bombers, B 25 and B 26, Fighters P 38, P 39, P 40, P 47, and P 51, and transports C 46 and C 47, according to the Maintenance Interchangeability Chart dated Dec 1943. The C 12 Sensitive Altimeter displayed altitude using 3 pointers. The first