Boost Pressure Gauge, -7 to 16 PSI, Mk IIIK JU-87 The Army Type F-1A Airspeed

The Army Type F-1A Airspeed Indicator was used across a number of US Army Air Corps and Air Force aircraft during WWII

MIL-G-7734B

But overall

foldouts of cockpit pictures and instrument panel

There are no part numbers on it

Boost Pressure Gauge, -7 to 16 PSI, Mk IIIK JU-87 The Army Type F-1A AirspeedThis is an authentic WWII era Boost Pressure Gauge Mk IIIK, indicating supercharger pressure from 7 to 16 PSI, as used in aircraft of the British RAF and the Royal Australian Air Force. It has a serial number indicating a year of manufacture of 1941. According to the guide "RAAF 346 Types and Locations of Instruments", the Mk IIIK Boost Gauge was used in versions of the Spitfire and Mosquito. This example is clearly experienced. There is a crack on