Airspeed Indicator, Japanese Naval Aviation, Model 3 "Kai" 2

Here is a WWII-era Airspeed Indicator, Model 3 Kai 2, as made by Tanaka, was used in a variety of aircraft used by the Japanese Navy (see anchor on data plate), including the infamous Zero fighter. It displays airspeed up to 400 knots.  Measurement begins at 50 knots along the outer scale with the pointer at the 8 o'clock position, rotating clockwise as speed increases up to 200 knots, at which point airspeed is indicated along the inner scale up to 400 knots.

This indicator was used in aircraft of the Japanese Navy such as*:

• Aichi E16A Type 2 Reconnaissance Seaplane Zuiun aka "Paul"
• Aichi B7A Torpedo/Dive Bomber Type 99 Ryuusei-Kai aka "Grace"
• Aichi M6A Submarine-launched Attack Seaplane Seiran
• Mitsubishi JM2 Fighter Raiden aka "Jack"
• Mitsubishi A6M2 Fighter Zero aka "Zeke"
• Nakajima C6N Carrier-based Reconnaissance Plane Saiun
• Yokosuka P1Y Bomber Ginga aka "Frances"
• Yokosuka D4Y Dive Bomber Type 1 Suisei aka "Judy"

*According to Funatsu Aviation Instruments Museum

It is in exceptional condition given its age. Measures ~3.25 inches diameter by ~3.5 inches deep.