Ammeter, 250mA, WWII Japanese Navy Aircraft Vickers It is about 3/4 inch

It is about 3/4 inch thick

The camera itself appears to be in good cosmetic condition

The lens appears to be a plastic material

NAS Coco Solo housed several Patrol/Patrol Bomber aircraft during its tenure

lubricated

Ammeter, 250mA, WWII Japanese Navy Aircraft Vickers It is about 3/4 inchThis 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.