Airspeed Indicator, Sensitive, 700MPH, Army Type F-1A, US Army Air Corps, WWII F-89 model 828 type 19Y1S

model 828 type 19Y1S

made by Sperry

Here is a Wheel Position Indicator for a US military vehicle with what appears to be tandem axle steering

The manual appears to be complete with hundreds of pages of text

It is in fine but 'experienced' condition for its age

Airspeed Indicator, Sensitive, 700MPH, Army Type F-1A, US Army Air Corps, WWII F-89 model 828 type 19Y1SThe 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 739U 03, and has a