Airspeed Indicator 450+ Knots Mk 9L Ref 6A/4721 RAF KC-97 When electrically powered and in-flight

When electrically powered and in-flight

B-25 Mitchell

This is a late WWII-era Wheel and Flap Position Indicator

MsoNormalTable {mso-style-name:"Table Normal"

Airspeed Indicator 450+ Knots Mk 9L Ref 6A/4721 RAF KC-97 When electrically powered and in-flightThis is an excellent example of a post WWII era Air Speed Indicator Mark 9L, Ref 6A 4721, as used in the British RAF fighters Supermarine Spitfire and Seafire. Air speed from 0 270 Knots is indicated by a clockwise rotating pointer, starting at the 6 o'clock position, along the outer perimeter scale. As the aircraft passes 270 Knots, air speed is indicated along the inner scale up to 450 Knots, with gradations up to 500 Knots. The indicator measures