Airspeed Indicator, Sensitive, 700MPH, Army Type F-1, US Army Air Force, WWII PBY Catalina This example is exceptional given

This example is exceptional given that the glass

Using three HFDF measurements

The time is set by pulling out and rotating the knob at the front corner and rotating

Briefly stated

Airspeed Indicator, Sensitive, 700MPH, Army Type F-1, US Army Air Force, WWII PBY Catalina This example is exceptional givenThe Army Type F 1 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 142 22B A A1, and has a