Altimeter, Sensitive AN5760-2, C-12, US Army Air Force, Kollsman, WWII Consolidated or Machmeter

or Machmeter

Each time it is depressed

The pointer rotates clockwise one full rotation to 2000 RPM

which essentially translates to Radium Expires 15 Sep 1943

Altimeter, Sensitive AN5760-2, C-12, US Army Air Force, Kollsman, WWII Consolidated or MachmeterThe Army AN5760 2 Type C 12 Sensitive Altimeter was used across a number of US Army Air Corps and Air Force aicraft during WWII, including heavy bombers B 17, B 24, B 29, medium bombers B 25 and B 26, as well as light bomber A 20, according to the Accessories Interchangeability Chart dated Feb 1945. It was also used in versions of US Army Air Force WWII fighters P 38, P 39, P 40, P 47, and P 51, as well as transports C 46 and C 47. This example was