Altimeter, Sensitive, Type C-13, 35,000 ft, Air Corps US Army WWII B-17, B-24, P-38, P-51 Cold War as well as in any

as well as in any models of these aircraft used by the US Navy

provided directional indication (left or right) to the pilot and the navigator with respect to the source of the signal

They were only as accurate as the observers knowledge of aircraft identification and of course

Aircraft that may have used this have not yet been identified

as used in US Navy aircraft during WWII

Altimeter, Sensitive, Type C-13, 35,000 ft, Air Corps US Army WWII B-17, B-24, P-38, P-51 Cold War as well as in anyHere 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 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 C 13 Sensitive Altimeter