Now this is an unusual find.
This style of compass was issued to the 'Sleeping Beauty' submersible canoes circa WWII. The nickname was given as the canoes would glide silently then dive underwater, and operate unseen.
The box is marked with Canoe Compass Patt. 962S and the top of the lid says 'DELICATE INSTRUMNET HANDLE WITH CARE' and from the information we have found it was most likely used by British Special Forces.
The compact, boxed design was so the compass would fit in the small space available in the canoe.
This is not just a curious find, but a collectors item.
Measures approx: 23cm x 23cm x 11cm