A glossary of watch terminology explained, listed in alphabetical order:
A
Acrylic crystal
A form of transparent plastic used as a protective covering for the watch face, usually found on cheaper watches. It’s more prone to scratches than mineral glass or sapphire crystal.
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Altimeter
Measures altitude.
Analog
Traditional watch face with hands and numbers/markers around the dial.
Analog quartz
A watch with a traditional face with hands and numbers/markers around the dial that is regulated by a quartz crystal.
Automatic mechanical watch
A watch that is powered by the motion of the wearer’s arm.
B
Back-light
A light usually found in digital watches to allow the wearer to see the time display in low light/dark.
Battery life
The period of time a battery is expected to power the watch before it runs out of energy and needs replacing. Bear in mind that the battery life can start at the time the manufacturer installed the battery in the watch, not necessarily when you bought the watch!
Bezel
The bezel is the ring around the watch face that secures the transparent protective window to the dial.
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Cabochon crown
A cabochon crown can be a small round jewel or synthetic stone that is used to decorate the tip of the watch crown or winding stem (typically a colored tip).
Calibre
The movement or mechanism which powers the watch.
Case/Case-back
The case is the main body which houses the inner workings of the watch, with the case-back sitting on the back of the watch’s case. The case-back is usually the part which has to be removed to replace a battery.
Chronograph
Dual-purpose watch with independent actions – 1 system provides the time, while the other system measures intervals of time much like a stopwatch.
Chronometer certified
A Chronometer certified watch as an automatic mechanical watch that has passed rigorous precision & accuracy tests to obtain an official COSC certified rating (Swiss Official Chronometer Testing Institute). The movement of a Chronometer certified watch should correspond to 99.99% precision with a tolerance of -4/+6 seconds per 24 hours.
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Clasp
The clasp is the mechanism that fastens the watch band, strap or bracelet around your wrist. There are several different types of clasps, including buckle clasps usually found on leather straps or deployment type clasps usually found on metal bands/bracelets.
Crown
Also referred to as the winder or winding stem. The crown is the small knob on an anolog watch usually found on the outside of the case at the 3 o’clock position. It is used to set the hands to the correct time position.
Crystal window
The transparent mineral/synthetic glass-type window that protects the watch face.>> Click here to go forward to Part 2 of Watch Terminology Explained (D-O)
>> Click here to go forward to Part 3 of Watch Terminology Explained (P-Z)
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