Riviera compass bearing Prism. The white rose has black graduation each grade. Internally accessible in case of repair. Fully removable and repairable. Device to trap air.
- Apparent diameter 2-1/4 (-57,5 mm);
- Jewel and pivot movements;
- Prismatic lens reading;
- Standard 1,5 V DC lighting (battery);
- Air bubble trap;
- White card with black 1° graduation.