Airspeed Indicator, Sensitive, 700MPH, Army Type F-1, US Army Air Force, WWII Bf-109 The B-20 Compass had a

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

made by Bendix PN 14613-IAK-A4

The wooden case is experienced but intact

The cover appears to have detached and repaired at some point

See image of spec sheet

Airspeed Indicator, Sensitive, 700MPH, Army Type F-1, US Army Air Force, WWII Bf-109 The B-20 Compass had 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 1 was made by Bendix, part number 739U 03, and has a