Airspeed Indicator, 430 Knots, R88-I-350-25 A-35 Vengeance part number 1828-1-A

part number 1828-1-A

dated 1945 (see document under Downloads):

and can therefore be centered on the index mark in the sighting tube

were naive

The dial in the lower center is a stopwatch

Airspeed Indicator, 430 Knots, R88-I-350-25 A-35 Vengeance part number 1828-1-AHere 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). It was also used in USN Fighters F6F Hellcat and F7F Tigercat, as well as Torpedo Bomber TBM Avenger and patrol bombers PBY 5 Catalina and PBM 5 Mariner, among others. On this style of air speed indicator, speed between 0 200