Altimeter, Tycos Type C, 25,000FT, WWI Aviation Section Signal Corps US Army C-43 The upright with the white

The upright with the white vertical marking opposite the data label is positioned forward

loosen clamp (C)

all pages are intact

which was connected to the antenna base with flexible shaft cables

Altimeter, Tycos Type C, 25,000FT, WWI Aviation Section Signal Corps US Army C-43 The upright with the whiteHere 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