A Bezard compass made by Optos. Optos is probably a German, Austrian or Swiss company.
Divisions: 6400 mils. All parts are made of aluminium (except for the needle) If the lid is closed, the needle is locked. But not the normal Bezard way. The axle of the lid depresses the needle lever raising the magnetic needle.
Contains Radium paint. (1.3 micro sievert/h)