A dome-like polished precious stone or gem, often used to decorate the lugs or crown on a watch.
Movements are normally given names to distinguish them before they are installed into a watch case. This could be a word or number, depending on the brand.
The main body of a watch, which holds the movement and protects it from dust, damp and shocks. Can be made of precious metals such as gold or platinum to form the look of a watch from the exterior.
Ceramic is a high-tech material chosen for use in watch cases and decorative elements because it’s extremely hardwearing and scratch-resistant. It’s often finished with a high polish
A ring- or grid-like band on the dial that can bear hour and minute numeral indexes or various other indices needed for calculation.
A watch with a stop/start function that enables the wearer to measure time intervals, normally up to an hour. Typically represented on the dial by a number of sub-dials, with a central seconds hand.
This is a watch that meets a standard set by the Contrôle Officiel Suisse des Chronomètres (COSC). The watch will have undergone precision tests at different temperatures, in different atmospheres, and will have obtained a certificate, usually included with purchase.
A feature on a watch that is additional to its normal time-keeping function, including calendars, moon phases, alarm clocks, repeating mechanisms, second time zones and chronographs.
The COSC (Contrôle Officiel Suisse des Chronomètres) awards the title of ‘chronometre’ to each watch that passes the bureau’s 15 days of tests, including testing for accuracy and consistency in different positions and at different temperatures.
A button found on the outside of the watch case which can be used for winding the mainspring, and setting a watch to the correct time, date etc