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  2. Tachymeter (watch) - Wikipedia

    en.wikipedia.org/wiki/Tachymeter_(watch)

    Tachymeter scale on a Citizen watch bezel. A tachymeter (pronounced / t æ ˈ k ɪ m ə t ər /) is a scale sometimes inscribed around the rim of an analog watch with a chronograph.It can be used to conveniently compute the frequency in inverse-hours of an event of a known second-defined period, such as speed (distance over hours) based on travel time (distance over speed), or measure distance ...

  3. Calculator watch - Wikipedia

    en.wikipedia.org/wiki/Calculator_watch

    A calculator watch is a digital watch with a built-in calculator, usually including buttons on the watch face. Calculator watches were first introduced in the 1970s and continue to be produced, despite falling from their peak popularity during the 1980s. The most dominant brands were the Casio Databank series and Timex .

  4. Digital Rights Watch - Wikipedia

    en.wikipedia.org/wiki/Digital_Rights_Watch

    Digital Rights Watch is a member of the CIVICUS World Alliance for Citizen Participation, the Australian Digital Inclusion Alliance, and the global Keep It On campaign. In October 2017, Digital Rights Watch's Chair Tim Singleton Norton received a special mention in the Access Now Global Heroes and Villains of Human Rights Awards.

  5. Diving watch - Wikipedia

    en.wikipedia.org/wiki/Diving_watch

    A diving watch, also commonly referred to as a diver's or dive watch, is a watch designed for underwater diving that features, as a minimum, a water resistance greater than 1.1 MPa (11 atm), the equivalent of 100 m (330 ft). The typical diver's watch will have a water resistance of around 200 to 300 m (660 to 980 ft), though modern technology ...

  6. Chronograph - Wikipedia

    en.wikipedia.org/wiki/Chronograph

    Citizen Atessa Eco-Drive ATV53-3023 analog-digital chronograph with 4 area Radio Controlled reception (North America, Europe, China, Japan) A chronograph is a specific type of watch that is used as a stopwatch combined with a display watch. A basic chronograph has an independent sweep second hand and a minute sub-dial; it can be started ...

  7. History of watches - Wikipedia

    en.wikipedia.org/wiki/History_of_watches

    A 16th-century portable drum watch with sundial. The 24-hour dial has Roman numerals on the outer band and Hindu–Arabic numerals on the inner one. [1] The history of watches began in 16th-century Europe, where watches evolved from portable spring-driven clocks, which first appeared in the 15th century. The watch was developed by inventors and ...

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