Watch Glossary and Terms with Images

A thirteen-piece dial comprises 12 enamelled cartouches for the hours set around a thirteenth central enamelled piece, often decorated and with the maker;s signature. A calendar dial gives calendar indications such as the day, date, month, year and religious festivals. A multiple time zone dial (see complication) gives the time in two or more zones. A dial with tide gauge (see complication) gives high and low tide times for a given location.They either pass or fail the watch movement. If the watch passes, it is called a chronometer.CrownKnob located on the outside of a watch case and used to wind a mechanical watch mainspring. It is also used for setting the right time and for correcting calendar indications. D ImagesDateOrdinal number referring to a day of the month, for example: the 10th February.Date-watchWatch indicating the date, the month and sometimes the year and the phases of the moon.DeployantThis clasp mechanism found on most high-end watches derives its name from the French adjective Deployant - which means to unfold, unfurl or spread out. Commonly and mistakenly called Deployment, the Deployant clasp is an expanding metal clasp that permits both metal and fabric bracelets to close invisibly around the wrist.DialIndicating "face" or plate of metal or other material, bearing various markings to show, in ordinary watches and clocks, the hours, minutes and seconds. Dials vary in shape, decoration, material, etc. The indications are given by means of numerals, divisions or symbols of various types.An aperture dial has openings (apertures) through which the time indications can be read.