Trotteuse, French seconds hand direct drive. Such dimechanical is obtained by mechanical or electronic means. Etablisseur French term for a watch factory which is engaged only in assembling watches, without itself producing the components, which it buys from specialist suppliers. Glass, Crystal Thin plate of glass or transparent synthetic material, for protecting the dials of watches, clocks, etc. Hand Indicator, usually made of a thin, light piece of metal, very variable in form, which moves over a graduated dial or scale.
Watches usually have three hands showing the hours, minutes and seconds.
Horn Variously shaped part of a watch, usually made flush with the case band and used to fix the wristlet. Round horns, faceted horns are some types. Thin horns, hardly flush with the case band are named ' loops '. Jewel Bearing, end stone or pallet used for reducing friction. Mainspring The driving spring of a watch or clock, contained in the barrel.