Altimeter, Air Section US Signal Corps, 15,000FT, WWI B-52 published by the Technical Air

published by the Technical Air Intelligence Center of the US Navy

Includes the original carton and label

25" square mount and 4" deep

Observers worked within the structure of the Ground Observer Corps to ensure proper training and communication

Here is a Mach Speed Indicator

Altimeter, Air Section US Signal Corps, 15,000FT, WWI B-52 published by the Technical AirThis 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. Made by Taylor Instruments, item # 2081 A. 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