Altimeter, Tycos Type C, 25,000FT, WWI Aviation Section Signal Corps US Army C-43 which was connected to the

which was connected to the antenna base with flexible shaft cables

Its use was carried over to aircraft used in the Korean War

and also used on the Focke-Wulf Fw190 Fighter

The oil temperature was measured via capillary tube (not included) and the pressures were measured via bourdon tubes

all pages are intact

Altimeter, Tycos Type C, 25,000FT, WWI Aviation Section Signal Corps US Army C-43 which was connected to theHere is a Type C Altimeter used in early military aircraft of the US Army Air Service during WWI. It is labeled as having been manufactured for the Aviation Section Signal Corps US Army, which was active from 1914 to 1918. 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 rotates the face of the dial while