Astro Compass, Mk II, and Case, Sperti JU-88 Type AN5780-3

Type AN5780-3

but doesn't affect the cosmetic appearance and could be replaced

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

see photo of the page from the manual describing its operation

Astro Compass, Mk II, and Case, Sperti JU-88 Type AN5780-3A 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