A watch feature that sounds an alarm at a pre-set time, or at regular intervals.

Analogue Digital
A watch that has both a digital display and the hands of a conventional watch. Usually common among sports-style watches.

Analogue Quartz
Most commonly-used term for any analogue timepiece that operates on battery or solar power and which is regulated by a quartz crystal.

Analogue Watch
A watch with a dial, hands, and numbers or markers that display a 12-hour time span.

Atmosphere (ATM)
Unit of pressure used to indicate water-resistance. One ATM is equivalent to 33 feet.

The strap, band, or bracelet that holds your watch to your wrist. A watch band can be made of leather, plastic, metal or fabric.


The surface ring on the watch face that surrounds and holds the crystal in place. Many watches have a uni- or multi-directional bezel that can twist clockwise or anticlockwise. This type of bezel can assist in calculations for elapsed time.

Cabochon Crown
A rounded semi-precious stone of synthetic material, usually black, fitted into the watch’s crown as an ornament.

The metal encasing the bezel and face. Stainless steel is the most typical metal used, but titanium, gold, silver, and platinum are also common.



A multi-functional sports watch with a stopwatch function. Most chronographs have two or three sub-dials (or mini-dials) for measuring fractions of seconds, minutes in increments other than 60, and hours in larger increments.


Precision watch set in various temperatures and positions and with accuracy so exact that it has met time standards set by an official watch institute in Switzerland.


Precision watch set in various temperatures and positions and with accuracy so exact that it has met time standards set by an official watch institute in Switzerland.


The latching mechanism that connects the two ends of the watch bracelet around the wrist. There are different types of watch clasps, such as the Deployment Buckle, Bracelet Clasp, Folding Clasp, Hook Buckle, Hidden Watch Clasp, and the Push-Button Hidden Clasp.



End of Life (EOL)
The end of life of a battery in a quartz movement watch is indicated by the second hand jumping every four seconds, or by a flashing digital display.

This refers to the visible area of the watch within the watch bezel where the dial is contained.


A knob that is usually found on the middle-right side of a watch that is used to set the time, date, etc. Most pull out to set the time. In water resistant styles, the crowns should screw down.


Day/Date Window
A window on the watch face that displays the day or date of the month.


The watch face. The numerals, indices, and surface design are usually set, though some are printed on.








Digital Watch
A mechanical or solid state watch in which time is shown through changing digits rather than with hands and a dial.


A type of dial with intricate engraving, usually very thin lines interwoven to create a surface texture.


The pointing devices anchored at the center of the dial and circling around to indicate hours, minutes, seconds, and any other special feature of the watch.



The science of time measurement, including the art of designing and constructing timepieces.


Synthetic sapphires or rubies that are used as bearings for gears of a mechanical watch. A quality hand-wound or automatic mechanical watch contains at least 17 jewels.



A revolutionary movement of micro-electronics that runs on energy generated from the natural movement of the wrist. Does not require batteries.


Liquid-Crystal Display (LCD)
A digital watch display that shows the time electronically by means of liquid held in a thin layer between two transparent plates.

Extensions on either side of the bezel where the bracelet or strap is attached.

The iridescent, milky interior shell of a fresh water mollusk that is sliced thin and used in watch dials. Mother-of-Pearl dials usually come in a milky white luster, but can also come in colours such as silvery gray, gray blue, pink, and salmon.


Moon Phase
An indicator window in the watch that keeps track of the phases of the moon.




Shiny, stainless steel used in many fashion timepieces.


Power Reserve
A feature of a mechanical watch that shows how much longer the watch will operate before it must be wound again.


Quartz Crystal Movement
A movement that allows a watch to be worn without being wound. It is powered by a quartz crystal that vibrates to maintain accuracy. Digital quartz has no mechanical parts but is powered by a battery.

Sapphire Crystal
A crystal (the cover that protects the watch’s face) made of synthetic sapphire with a hardness second only to a diamond. It is transparent and scratch-resistant.

Screw-Lock Crown
A crown that can be screwed into the case to make the watch watertight.




Skeleton Case
A transparent front or back that permits one to view the inner workings of the watch.


A watch that uses solar energy derived from any light source to power the quartz movement. The batteries are recharged by solar panels on the watch’s face, and a power reserve function allows the watch to run in the dark.


Water Resistant
Ability to resist damage caused by exposure to water.