Ammeter, 50mA, WWII Japanese Navy Aircraft Italian Here is an aircraft battery

Here is an aircraft battery Ammeter

Right Auxiliary

It was used in the H-21 Shawnee/Workhorse Piasecki Helicopter

used for the Twin Compass System

Ammeter, 50mA, WWII Japanese Navy Aircraft Italian Here is an aircraft batteryThis 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.