The indications are given by means of numerals, divisions or symbols of various types. Such displays can be obtained by mechanicalor 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.
Jewel Bearing, endstone or pallet used for reducing friction. Mainspring The driving spring of a watch or clock, contained in the barrel. Marine chronometers with mechanical movements are mounted on gimbals so that they remain in the horizontal position is necessary for their precision. Middle part of the case, in which the movement is fitted. Repeater Watch that strikes the hours by means of a mechanism operated by a push-piece or bolt.