Astro Compass, Mk II, and Case, Sperti JU-88 The corrosion is evidence of

The corrosion is evidence of its age

Type AN5780-3

Here is an authentic original Flight Manual for the Boeing Stratofortress B-52 B

was commonly used by US Navy aircraft and was an earlier generation which was superceded by the AN-N6 (24v)

but this may have been used in an McDonnell Douglas's line of MD 500 Defender helicopters

Astro Compass, Mk II, and Case, Sperti JU-88 The corrosion is evidence ofA WWII era Astro Compass, Mk II, in its original bakelite case, used for celestial navigation. Used across many versions of US Army Air Force aircraft with navigator crew during the era, such as bombers B 17 Flying Fortress, B 24 Liberator, and B 29 Superfortress, and transports C 46 Commando, C 47 Dakota, and C 54 Skymaster. The compass would be placed in a fixed mount on top of the instrument panel or in the navigators compartment, and sighted to a