Airspeed Indicator, 700MPH, Army Type F-2, US Army Air Corps, WWII FW-190 but the directional lens is

but the directional lens is absent in this specimen

1 Pair of O-1 Second Lieutenant Embroidered Rank Insignia

The highly unusual design

At the top of the compass is a rotatable glass lens with parallel line markings and degree markings around its perimeter

The B-20 Compass had a small module containing magnets at the top of the compass to compensate for deviation

Airspeed Indicator, 700MPH, Army Type F-2, US Army Air Corps, WWII FW-190 but the directional lens isThe Army Type F 2 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 2 was made by Bendix, part number 1426 37A A6, and has a