Airspeed Indicator, Maximum Allowable, Type L-7A w/Mach Limiter, Kollsman 1214DX Smiths indicating a manufacturing date of

indicating a manufacturing date of 1942

There is a "0" above an "A" at center position

The toggles do flip and the keying switch still has its spring action

which indicates atmospheric pressure in inches of mercury

Airspeed Indicator, Maximum Allowable, Type L-7A w/Mach Limiter, Kollsman 1214DX Smiths indicating a manufacturing date ofThis is a Cold War era Airspeed Indicator, 0 650 Knots, Maximum Allowable, Type L 7A, made by Kollsman and used in aircraft of the US Air Force such as versions of the fighters F 86 Sabrejet, F 80 Shooting Star, F 84 Thunderjet, F 89 Scorpion, F 94 Starfire, trainer T 33, and versions of bombers B 47 and early B 52's (see illustration of B 52 panel). The main pointer rotates clockwise as the airspeed increases. The horizontally rotating drum above