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A watch is a timepiece intended to be carried or worn by a person.wikipedia
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clockstimepiecemechanical clock
A watch is a timepiece intended to be carried or worn by a person.
Watches and other timepieces that can be carried on one's person are often distinguished from clocks.

Mechanical watch

mechanicalmechanical watchesmanual winding
These are called mechanical watches.
A mechanical watch is a watch that uses a clockwork mechanism to measure the passage of time, as opposed to quartz watches which function electronically via a small battery.


smart watchsmartwatcheswatch phone
Developments in the 2010s include smartwatches, which are elaborate computer-like electronic devices designed to be worn on a wrist.
A smartwatch is a wearable computer in the form of a wristwatch; modern smartwatches provide a local touchscreen interface for daily use, while an associated smartphone app provides for management and telemetry (such as long-term biomonitoring).


The study of timekeeping is known as horology.
Clocks, watches, clockwork, sundials, hourglasses, clepsydras, timers, time recorders, marine chronometers and atomic clocks are all examples of instruments used to measure time.

Watch strap

A wristwatch is designed to be worn around the wrist, attached by a watch strap or other type of bracelet.
A watch strap, watch band, or watch bracelet is a bracelet that straps a wrist watch onto the wrist.


chronographschronographic wristwatchtimer
Most electronic quartz watches, on the other hand, include time-related features such as timers, chronographs and alarm functions.
A chronograph is a specific type of watch that is used as a stopwatch combined with a display watch.

Alarm clock

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Most electronic quartz watches, on the other hand, include time-related features such as timers, chronographs and alarm functions.
Alarm clocks are also found on mobile phones, watches, and computers.

List of most expensive watches sold at auction

most expensive watch ever sold at auctionmost expensive watches ever sold at auctionmost expensive watches ever sold at auctions
As of 2018, the most expensive watch ever sold at auction is the Patek Philippe Henry Graves Supercomplication, which is the world's most complicated mechanical watch until 1989, reaching a final price of 24 million US dollars (23,237,000 CHF) in Geneva on November 11th, 2014.
This list of most expensive watches sold at auction documents the watches sold at auction worldwide for at least 1.5 million US dollars.

Movement (clockwork)

movementmovementswatch movement
Today, most watches in the market that are inexpensive and medium-priced, used mainly for timekeeping, have quartz movements.
In horology, a movement, also known as a caliber, is the mechanism of a watch or timepiece, as opposed to the case, which encloses and protects the movement, and the face, which displays the time.

Quartz crisis

Quartz Revolutionadventchallenge
Historically, this is called the quartz revolution.
In 1954, Swiss engineer Max Hetzel developed an electronic wristwatch that used an electrically charged tuning fork powered by a 1.35 volt battery.


In continental Europe Girard-Perregaux and other Swiss watchmakers began supplying German naval officers with wristwatches in about 1880.
Girard-Perregaux is a luxury Swiss watch manufacture with its origins dating back to 1791.

Balance wheel

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During most of its history the watch was a mechanical device, driven by clockwork, powered by winding a mainspring, and keeping time with an oscillating balance wheel.
Until the 1980s balance wheels were the timekeeping technology used in chronometers, bank vault time locks, time fuzes for munitions, alarm clocks, kitchen timers and stopwatches, but quartz technology has taken over these applications, and the main remaining use is in quality mechanical watches.


TudorOyster DateRolex Australia
Hans Wilsdorf moved to London in 1905 and set up his own business, Wilsdorf & Davis, with his brother-in-law Alfred Davis, providing quality timepieces at affordable prices; the company later became Rolex.
In particular, Paul Newman's Rolex Daytona currently holds the title of the most expensive wristwatch and the second most expensive watch ever sold at auction, reaching a final price of 17.75 million US dollars in New York on October 26th, 2017.

Clock face

dialfacehour hand
This innovation increased watches' accuracy enormously, reducing error from perhaps several hours per day to perhaps 10 minutes per day, resulting in the addition of the minute hand to the face from around 1680 in Britain and 1700 in France.
A clock face, or dial, is the part of an analog clock (or watch) that displays the time through the use of a fixed-numbered dial or dials and moving hands.

Pocket watch

pocketwatchfob watchwatch fob
A pocket watch is designed for a person to carry in a pocket.
A pocket watch (or pocketwatch) is a watch that is made to be carried in a pocket, as opposed to a wristwatch, which is strapped to the wrist.

Quartz clock

quartz watchquartzquartz movement
In the 1960s the electronic quartz watch was invented, which was powered by a battery and kept time with a vibrating quartz crystal. The introduction of the quartz watch in 1967, (the Beta 1 and the Astron) was a revolutionary improvement in watch technology.
Since the 1980s, when the advent of solid-state digital electronics allowed them to be made compact and inexpensive, quartz timekeepers have become the world's most widely used timekeeping technology, used in most clocks and watches, as well as computers and other appliances that keep time.


Bulova Watch CompanyAccutronBulova Watch Co.
Introduced by Bulova in 1960, they use a tuning fork with a precise frequency (most often 360 hertz) to drive a mechanical watch.
It manufactures watches and clocks and is based in New York City.


Hattori SeikoHattori Seiko Co.lorus
In 1959 Seiko placed an order with Epson (a daughter company of Seiko and the 'brain' behind the quartz revolution) to start developing a quartz wristwatch.
Seiko Holdings Corporation, commonly known as Seiko, is a Japanese holding company that has subsidiaries which manufactures and sells watches, clocks, electronic devices, semiconductors, jewelries, and optical products.

Electric watch

electromechanical watchelectronic watchelectronic watches
Tuning-fork watches were rendered obsolete when electronic quartz watches were developed.
In horology the term electric watch is used for the first generation electrically-powered wristwatches which were first publicly displayed by both Elgin National Watch Company and LIP on the 19th of March 1952 with working laboratory examples in Chicago and Paris.

Astron (wristwatch)

Astron35 SQ AstronElectronic Quartz Wristwatch
The introduction of the quartz watch in 1967, (the Beta 1 and the Astron) was a revolutionary improvement in watch technology.
The Astron wristwatch, formally known as the Seiko Quartz-Astron 35SQ, was the world's first "quartz clock" wristwatch.

Thomas Tompion

The verge escapement was replaced in quality watches by the cylinder escapement, invented by Thomas Tompion in 1695 and further developed by George Graham in the 1720s.
Due to his relationship with the scientist Robert Hooke he made some of the first watches with balance springs, these had the potential to be much more accurate than earlier watches.

The Swatch Group

Swatch GroupSwatch Group USAThe Swatch Group Ltd.
After a consolidation of the mechanical watch industry in Switzerland during the 1970s, mass production of quartz wristwatches took off under the leadership of the Swatch Group of companies, a Swiss conglomerate with vertical control of the production of Swiss watches and related products.
The Swatch Group AG is a Swiss manufacturer of watches and jewellery.

Crystal oscillator

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In place of a balance wheel which oscillated at perhaps 5 or 6 beats per second, it used a quartz crystal resonator which vibrated at 8,192 Hz, driven by a battery-powered oscillator circuit.
Most are used for consumer devices such as wristwatches, clocks, radios, computers, and cellphones.

Button cell

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For quartz wristwatches, subsidiaries of Swatch manufacture watch batteries (Renata), oscillators (Oscilloquartz, now Micro Crystal AG) and integrated circuits (Ebauches Electronic SA, renamed EM Microelectronic-Marin).
Button cells are used to power small portable electronics devices such as wrist watches, pocket calculators, artificial cardiac pacemakers, implantable cardiac defibrillators, automobile keyless entry transmitters, and hearing aids.

Timex Group USA

TimexTimex CorporationWaterbury Clock Company
The pin-lever escapement (called the Roskopf movement after its inventor, Georges Frederic Roskopf), which is a cheaper version of the fully levered movement, was manufactured in huge quantities by many Swiss manufacturers as well as by Timex, until it was replaced by quartz movements.
The Waterbury Clock Company met this need by modifying the small Ingersoll ladies' Midget pocket watch to become military-issue wristwatches — lugs were added for a canvas strap, the crown was repositioned to 3 o'clock, hands and numbers were made luminescent for nighttime readability, thus making one of the first wrist watches.