Altimeter, Type C, Tyco, 25,000FT, WWI to 1926 Air Service USArmy Peggy Bomber It is in superb condition

It is in superb condition given its age

The toggles do flip and the keying switch still has its spring action

this acronym may be from an office of the Joint Intelligence Collecting Agency office in North Africa

and the left knob sets the course heading

These instruments range from New Old Stock to clearly 'experienced' but are in reasonable shape for their ages

Altimeter, Type C, Tyco, 25,000FT, WWI to 1926 Air Service USArmy Peggy Bomber It is in superb conditionHere 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