Voltmeter, 15V, WWII Japanese Aircraft Martin designed for aeronautical use

designed for aeronautical use

which rotates the checklist around a vertical axis

or 64 frames per second

and a spider-type compensator

likely to allow illumination from a light source mounted internally in the dashboard

Voltmeter, 15V, WWII Japanese Aircraft Martin designed for aeronautical useThis is a Japanese Voltmeter,15V. It is presumed to be a WWII era indicator used in aircraft of the Japanese Army or Navy. 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.