Altimeter, Japanese Naval Aviation, Sensitive Model 2, 10,000 M A-1 Skyraider type AChS-1

type AChS-1

used to indicate the supercharger power being delivered to the engine when demanded

A-20 Havoc

The manual is hard-bound

These systems were used in versions of the WWII-era Air Corps US Army Douglas C-47 Skytrain transport

Altimeter, Japanese Naval Aviation, Sensitive Model 2, 10,000 M A-1 Skyraider type AChS-1This specimen of the Model 2 Sensitive Altimeter is made by Tanaka. The scale is interesting in that the long pointer rotates clockwise from the 6 o'clock position indicating altitude in 100 Meters per index tick mark along the outer scale. Once the aircraft reaches 5000 Meters, the short pointer begins to rotate clockwise, indicating altitude up to 10,000 Meters along the small inner scale. The knob adjusts the accuracy of the reading by calibrating