Altimeter, Type C, Tyco, 25,000FT, WWI to 1926 Air Service USArmy F9F Panther It has date stamp of

It has date stamp of January 1951 and Boeing tamper evidence seals

part number 1818-1-A

Its former owner was an RCAF F-86 Pilot

which would be rotated to align with the compass card floating in the reservoir below it

Altimeter, Type C, Tyco, 25,000FT, WWI to 1926 Air Service USArmy F9F Panther It has date stamp ofHere is an Altimeter used in military aircraft of the Air Service, US Army, which existed with that name from 1918 1926 until it was renamed Air Corps US Army. Crudely measured altitude from 0 25,000 ft, which was pretty high for aircraft of that era and requiring supplemental oxygen for the crew to exceed ~12,500 ft based upon modern standards. The knob would rotate the face of the dial while the pointer remains fixed to set the present field