Airspeed Indicator, 500MPH, Army Type D-7, US Army Air Corps, WWII C-47 and responsible as a bomb-aimer

and responsible as a bomb-aimer

and Fuel pressure (from 0-25 PSI)

There is a Calibration checklist mounted inside of the felt-lined cherry wood case

Used to alter the Heading Index

Airspeed Indicator, 500MPH, Army Type D-7, US Army Air Corps, WWII C-47 and responsible as a bomb-aimerThe Army Type D 7 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 D 7 was made by Kollsman, part number 586K 026. The text "AC