Heading Selector, Zero Reader C-46 and the Sperry part number

and the Sperry part number is 673447

Weston model 1534

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

and EC-121 aircraft

as used in aircraft of the US Army Air Force and US Navy with tail wheel landing gear

Heading Selector, Zero Reader C-46 and the Sperry part numberThe 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