Airspeed Indicator, 420 Knots, US Navy Fairey Battle with two clamping screws

with two clamping screws

The black paint on its face shows some minor micro blistering

Reference Number 41-7952

The Gunners Quadrant was also used to level the guns of aircraft such as the B-29 Superfortress and to harmonize the guns with their gun sights

has a service tag from the WWII-era Rolls Royce Flight Test establishment situated at Hucknall Aerodrome

Airspeed Indicator, 420 Knots, US Navy Fairey Battle with two clamping screwsHere is an Air Speed Indicator as used in WWII era and post WWII era aircraft of the US Navy such as the F4U Corsair fighter (see illustration of the F4U instrument panel from its flight manual dated 1944 showing its location). On this style of air speed indicator, speed between 0 200 knots is read on the outer pointer arrow clockwise along the outer perimeter scale, from 0 360 degrees. Once past 12 o'clock position, speed is then read from 200 knots