Airspeed Indicator, Sensitive, 700MPH, Army Type F-1A, US Army Air Force, WWII Sally Bomber The Type A-8 was a

The Type A-8 was a navigation stopwatch designed for timing ground speed meters for determining the velocity of aircraft relative to the ground

On the reverse side is the combination Climb and Descent Tabulator

a green light would illuminate

Not much is known about this altimeter

which pioneered the way for future designs of aerial refueling aircraft

Airspeed Indicator, Sensitive, 700MPH, Army Type F-1A, US Army Air Force, WWII Sally Bomber The Type A-8 was aThe Army Type F 1A Airspeed Indicator was used across a number of US Army Air Corps and Air Force aircraft during WWII, including heavy bombers B 17, B 24, B 29, medium bombers B 25 and B 26, as well as light bomber A 20, according to the Accessories Interchangeability Chart dated Feb 1945. It was also used in versions of US Army Air Force WWII fighters P 38, P 39, P 40, P 47, and P 51. This F 1A was made by Kollsman, part number 739BU 03, and has a