Compass, Aperiodic, US Army Air Force Type D-12 Victor and the markings on the

and the markings on the face are in place (yet changing color from the many years) and unblemished

According to the US Army Air Force Maintenance Interchangeability Chart dated Feb 1945

or film spools

Production was only about 500 units

The knurled center knob was then tightened to secure it in place

Compass, Aperiodic, US Army Air Force Type D-12 Victor and the markings on theThe US Army Air Force Type D 12 Direct Reading Aperiodic Compass was used at the navigators station across many US WWII aircraft, including heavy bombers B 17, B 24, B 29, medium bombers B 25 and B 26, and transports C 46, C 47, and C 54. Made by Bendix, part number 1832 1 A, it has a serial number prefix of AF 45, indicative of a manufacturing year 1945. The navigators' direct reading compass is known as an aperiodic (without a period) compass, since