Airspeed Indicator, 430 Knots, US Navy North American Aviation The original QC document is

The original QC document is also included in an envelope and signed by the original QC inspector

the D-7 Airspeed Indicator is a differential pressure measuring instrument used to indicate the speed of the airplane through the air

This unit has a label from San Antonio Air Materiel Area Kelly Air Force Base

see the location of the receiver on the right side of the cockpit in a P-47 from its flight manual

The 36-page booklet covers the strategy

Airspeed Indicator, 430 Knots, US Navy North American Aviation The original QC document isHere 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