Altimeter, Sensitive, Type C-12, 50,000 ft, US Army Air Force WWII Mosquito and is in its original

and is in its original

slips into the frame on the front of the panel

Sweeting’s book "Combat Flying Equipment":

According to other websites which showcase British aviation artifacts

The AN 5771-5 Suction Gage was used across all aircraft of the US Army Air Corps

Altimeter, Sensitive, Type C-12, 50,000 ft, US Army Air Force WWII Mosquito and is in its originalHere 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