Compass, Aperiodic, US Army Air Force Type D-12 Victor According to the US Army

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

according to their flight manuals from the 1950's

or Sacramento Air Material Area at McClellan Air Base

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

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

Compass, Aperiodic, US Army Air Force Type D-12 Victor According to the US ArmyThe 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