Altimeter, Sensitive, Type C-12, 50,000 ft, US Army Air Force WWII F4F Wildcat The clock works when wound

The clock works when wound and seems to keep time

It's condition gives clues of its age

as used in B-17s (glass cracked)

Each drawing is 8

75 inches diameter and ~1 inch deep

Altimeter, Sensitive, Type C-12, 50,000 ft, US Army Air Force WWII F4F Wildcat The clock works when woundHere is an early WWII era Sensitive Altimeter, Air Corps US Army Type C 12, made by Kollsman. 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. It has a serial number prefix AF 43, evidence of a manufacturing year