Heading Selector, Zero Reader C-46 See photo of the location

See photo of the location of the instruments on the Flight Engineers lower instrument panel from the C-121 flight manual dated 1958

and EC-121 aircraft

It is in exceptional condition given its age and appears to be new old stock

Weston model 1534

Heading Selector, Zero Reader C-46 See photo of the locationThe Zero Reader Heading Selector, made by Sperry part number 672670 2, was a component of the Zero Reader Flight Computer. The Zero Reader was used in a number of Cold War era aircraft of the US Air Force, such as the F 89 Scorpion and F 94 Starfire jet fighters interceptors (see photos from F 89 flight manual showing the location of this instrument). According to the F 94 Starfire Flight Manual: The Zero Reader is an automatic flight instrument that