Watch Glossary

In-house automatic, 70-hour reserve, chronometer certified, used in Atmos clocks

Synthetic ruby or sapphire bearing reducing friction at watch movement pivot points

Total number of synthetic ruby jewel bearings in a movement; more jewels typically reduce friction.

Metal-lined bearing holes that hold synthetic ruby jewels to reduce friction on pivots.

Synthetic rubies used as low-friction bearings for watch pivots and components.