Ammeter, 250mA, WWII Japanese Navy Aircraft Vickers it has two WWII aircraft

it has two WWII aircraft etched on opposite corners

to keep the unit in a caged position for transport

lubricated

The lens appears to be a plastic material

It is about 3/4 inch thick

Ammeter, 250mA, WWII Japanese Navy Aircraft Vickers it has two WWII aircraftThis is a Japanese Ammeter, 250mA. It is presumed to be a WWII era indicator used in aircraft of the Japanese Navy, judging from the anchor symbol on the lower left of the dial. 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 2. 5 inches diameter and ~1. 5 inches deep. The glass and case are intact and the lettering is distinct.