Altimeter in Display Case, Aviation Section US Signal Corps, 15,000FT, WWI OH-6 Cayuse this would be regarded as

this would be regarded as a 'non-sensitive' altimeter

It red lines at 110degC

and a taller tail fin

but the center knob is provided with which to rotate the dial

Reference Number 41-7952

Altimeter in Display Case, Aviation Section US Signal Corps, 15,000FT, WWI OH-6 Cayuse this would be regarded asThis is an Altimeter used in military aircraft of the Aviation Section, US Signal Corps, which existed from 1914 1918 and was the WWI era precursor to today's US Air Force. This altimeter crudely measured altitude from 0 15,000 ft. By loosening the small retaining lever, gripping the knurled rim of the faceplate and turning, the numerical scale rotates clockwise or counter clockwise while the pointer remains stationary, to correct the altitude reading