Jewels
Jewels are often used in top quality wristwatches, not just externally for decoration but also internally for functionality. The hard surface of the jewels has a lower friction coefficient with metal, which increases the accuracy and lifetime of the watch. Jewel bearings were invented around 1702 by Nicolas Fatio de Duillier and Pierre and Jacob Debaufre. At the time, many watches used minerals su…Read More