Altimeter, Sensitive, Type C-12, 50,000 ft, US Army Air Force WWII Mosquito The AN 5771-5 Suction Gage

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

The lamp projected the star chart image onto the map table below

When the signal lamp is used in this manner no radio transmission takes place

According to other websites which showcase British aviation artifacts

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 The AN 5771-5 Suction GageHere 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