Airspeed Indicator, 500MPH, Army Type D-7, US Army Air Corps, WWII C-47 Used to alter the Heading

Used to alter the Heading Index

It also includes diagrams of instrument panels of specific aircraft showing the location of these instruments

The inside of the glass could use some cleaning

the precursor to today's US Air Force

and responsible as a bomb-aimer

Airspeed Indicator, 500MPH, Army Type D-7, US Army Air Corps, WWII C-47 Used to alter the HeadingThe 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