Ammeter, 50mA, WWII Japanese Navy Aircraft Italian used for the Twin Compass

used for the Twin Compass System

Right Auxiliary

where they could then removed from the aircraft before entering combat (but at times were left in the aircraft for subsequent use)

Here is an aircraft battery Ammeter

changing the yellow/blue indicator

Ammeter, 50mA, WWII Japanese Navy Aircraft Italian used for the Twin CompassThis is a Japanese Ammeter, 50mA. It is presumed to be a WWII era indicator used in aircraft of the Japanese Navy, judging from the anchor symbol on its face (center). This has not been verified. Aircraft that may have used this have not yet been identified. It is in good condition given its age. Measures ~3. 5 inches diameter and ~1. 5 inches deep. The glass and case are intact and the lettering is distinct.