The blued steel needle has a brass pivot that can be locked by a small system.
The bottom of the compass is engraved with the 4 cardinal points and an arrow indicating the magnetic declination at approximately 12° West. The whole thing is covered in glass.
The back of the instrument is unengraved, revealing two screws that hold the compass in place.
Dimensions of the dial: 6.7 cm x 6.7 cm x 1.3 cm; of the case: 8.3 cm x 8.5 cm x 2.2 cm.
With its shaped case.
Made in Germany circa 1730.