Airspeed Indicator 320 MPH Mk IXD RAF F-86 It appears to have never

It appears to have never been put into service judging from its superb condition

The calibration screw is on the rear of the instrument at the 3 o'clock position

long and short

The case is open

This 77-page manual describes the gun and its subassemblies

Airspeed Indicator 320 MPH Mk IXD RAF F-86 It appears to have neverThis is an excellent example of a WWII era Air Speed Indicator Mark IXD, as used in the British RAF Fairey Battle bomber and the Airspeed Oxford utility aircraft. This particular specimen has a serial number showing a year of manufacture of 1940. Air speed from 0 200 MPH is indicated by a clockwise rotating pointer, starting at the 6 o'clock position, along the outer perimeter scale. As the aircraft passes 200 MPH, air speed is indicated along the