Voltmeter, 15V, WWII Japanese Aircraft Martin such as the F-86 Sabrejet

such as the F-86 Sabrejet

It has two markers

the pointer indicates altitude along the inner green scale

as used in large aircraft in both British military and civil service during the 1950's in Reconnaissance/Bomber aircraft such as the Avro Shackleton and English Electric Canberra

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

Voltmeter, 15V, WWII Japanese Aircraft Martin such as the F-86 SabrejetThis 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.