Airspeed Indicator, Japanese Army Aviation, Type 98 WW1 It has a serial number

It has a serial number prefix of AF 42

The data plate is absent from this example

It consists of a master unit containing both the gyro and magnetic elements normally stowed in a part of the aircraft away from large masses of magnetic material which would distort the Earth’s magnetic field

Here is a WWII-era artifact: an Oxygen Flow Indicator

Airspeed Indicator, Japanese Army Aviation, Type 98 WW1 It has a serial numberThis 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