Airspeed Indicator, Sensitive, 700MPH, Army Type F-1A, US Army Air Force, WWII Sally Bomber and protects the lens from

and protects the lens from dirt and oil

which pioneered the way for future designs of aerial refueling aircraft

The selector enables selection of the desired track and provides to-from information

a green light would illuminate

home of RAF Hucknall north of Nottingham England

Airspeed Indicator, Sensitive, 700MPH, Army Type F-1A, US Army Air Force, WWII Sally Bomber and protects the lens fromThe 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