Altimeter, Air Section US Signal Corps, 15,000FT, WWI B-52 the board is strapped to

the board is strapped to the pilots left leg with the map inserted between the plastic panel and the aluminum frame

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

and the smallest pointer is just peaking from behind the 1000's pointer

which altered the angle of the projected light) to transmit Morse code

as evidenced by a clear window that is visible when looking in from behind

Altimeter, Air Section US Signal Corps, 15,000FT, WWI B-52 the board is strapped toThis 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