Altimeter in Display Case, Aviation Section US Signal Corps, 15,000FT, WWI OH-6 Cayuse

Altimeter in Display Case, Aviation Section US Signal Corps, 15,000FT, WWI OH-6 CayuseThis 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

It red lines at 110degC

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

Reference Number 41-7952

The indicator would have required the separate lamp module (Fl26682 & 27003

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

The throttle grip contains the speed brake control switch

This Airspeed Indicator is a WWII-era US Army Air Force Type D-7

it has a manufacturing date of Feb 14

As the engine speed increased

and a taller tail fin

TO 30-100D-1 dated Jan 1944

to Military-Extended