Altimeter, Sensitive, Type C-12, 50,000 ft, US Army Air Force WWII Mosquito According to other websites which

According to other websites which showcase British aviation artifacts

azimuth and elevation of the identified target and allow the observer to take control if the “blip” was identified as unfriendly

slips into the frame on the front of the panel

Must have been a high pressure application judging from its construction (number of screws and thickness of lens)

Altimeter, Sensitive, Type C-12, 50,000 ft, US Army Air Force WWII Mosquito According to other websites whichHere is an early WWII era Sensitive Altimeter, Air Corps US Army Type C 12, made by Conn, part number 80000. 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 knob is used to adjust the altimeter to the barometric