WW2 RAF Bomber aircraft compass

[River Rat1]

Got this 15 or more years ago at a military show in San Jose Ca when I use to live in the bay area from somebody in the parking lot before I went into the show it was cheap could not pass it up. Kind of large so don't have it on display I should change that. But most likely for a Lancaster bomber due to its size just too big for a fighter. Even came with its original shipping crate.