Glossary of watchmaking

Onyx

Onyx

A black agate that is often found as watch dials.

Terms with the same letter

Observatory chronometer Official rating certificate Oignon (watch) Oil sink Oiling Onyx Opale Opaque Organic Orient Ornamental gems Oscillating pinion Oscillating weight (Rotor) Oscillation Oscillator Oval

T T

The helical rib around a screw shank.

A thin sheet of glass or a transparent synthetic material to protect a clock or watch dial. Sapphire crystalMineral...