Compass, Navigational, US Army Air Force Type D-12
The US Army Air Force Type D-12 Navigational 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 D-12 was typically mounted on the navigator's desk. It has a rotating dial with directional markings, which would be rotated to align with the compass card floating in the reservoir below it. This example no longer contains fluid, and the fill port on the bottom has a small crack. Otherwise, it is a fine example.
Measures ~7 inches diameter and ~4 inches in height.