Airspeed Indicator, Japanese Army Aviation, Type 98 WW1 the A-20 Havoc

the A-20 Havoc

the mainspring would stop when the crown is pressed after running)

a high resolution

The Army Type D-7 Airspeed Indicator was used across a number of US Army Air Corps and Air Force aircraft during WWII

The data plate is absent from this example

Airspeed Indicator, Japanese Army Aviation, Type 98 WW1 the A-20 HavocThis original WWII era Airspeed Indicator, Type 98, made by Tanaka, was used in a variety of aircraft of the Japanese Army. It displays airspeed up to 700 km hr. Measurement begins at 50 knots along the outer scale with the pointer at the 6 o'clock position, rotating clockwise as speed increases up to 400 km hr, at which point airspeed is indicated along the inner scale up to 700 km hr. According to the online Funatsu Aviation Instruments Museum, this