Altimeter, Sensitive, Type C-12, 50,000 ft, US Army Air Force WWII B5N2 Kate The cover has become detached

The cover has become detached from its staples

for the US Army Air Corps

The Disk Speed Indicator Mk XV was used by WWII US Army Air Force and Navy bombardiers to verify and calibrate the disk speed of the Norden Bomb Sight during flight before initiating the bomb run

The gyro is uncaged when the knob is pulled out

The cabinet design appears to be repurposed from that used by the Fl22861 Altitude Recorder/Barograph

Altimeter, Sensitive, Type C-12, 50,000 ft, US Army Air Force WWII B5N2 Kate The cover has become detachedHere is a WWII era Sensitive Altimeter, Air Corps US Army Type C 12, made by Kollsman. 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 C 12 Sensitive Altimeter displayed altitude using 3 pointers. The first and