Altimeter, Sensitive, Type C-13, 35,000 ft, US Navy WWII 671K-05 H-46 having an accuracy within plus

having an accuracy within plus or minus 6 feet on the 400-foot range and within plus or minus 60 feet on the 4000-foot range

This knob is very stiff and could use a bit of TLC

It was the forerunner of the Bendix Polar Path and Sperry CL 11

the gyro produced directional indication signals which were amplified and transmitted to the autopilot system and indicators on the flight deck of the aircraft

but there is still a metal government seal wired into place at 4 o'clock to provide evidence if opened

Altimeter, Sensitive, Type C-13, 35,000 ft, US Navy WWII 671K-05 H-46 having an accuracy within plusHere is an early WWII era Sensitive Altimeter, Air Corps US Army Type C 13 (also AN 5760 1), made by Kollsman. part number 671K 05. The C 13 Altimeter was used across all aircraft of the US Navy and 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. This altimeter is