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  2. Citizen Watch - Wikipedia

    en.wikipedia.org/wiki/Citizen_Watch

    Citizen launched the world's first multi-band atomic timekeeping watch in 1993 and has remained a pioneer of this field. Synchronized to atomic clocks, these watches are accurate to within one second in one hundred thousand years. [7] The Skyhawk A-T line features radio-controlled timekeeping.

  3. List of atomic clocks - Wikipedia

    en.wikipedia.org/wiki/List_of_atomic_clocks

    18 cesium atomic clocks and 4 hydrogen maser clocks Cs, H National Institute of Information and Communications Technology; Koganei, ...

  4. Atomic clock - Wikipedia

    en.wikipedia.org/wiki/Atomic_clock

    Atomic clocks are installed at sites of time signal radio transmitters. [113] They are used at some long-wave and medium-wave broadcasting stations to deliver a very precise carrier frequency. [114] Atomic clocks are used in many scientific disciplines, such as for long-baseline interferometry in radio astronomy. [115]

  5. Radio clock - Wikipedia

    en.wikipedia.org/wiki/Radio_clock

    A modern LF radio-controlled clock. A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [1]) referred to as an "atomic clock", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.

  6. Our Favorite Citizen Watches for Men: Eco-Drive, Sports ... - AOL

    www.aol.com/lifestyle/favorite-citizen-watches...

    Citizen’s Eco-Drive technology makes these watches some of the most environmentally friendly on the market. Our Favorite Citizen Watches for Men: Eco-Drive, Sports Watches, Dress Watches ...

  7. Quartz clock - Wikipedia

    en.wikipedia.org/wiki/Quartz_clock

    Standard-quality 32 768 Hz resonators of this type are warranted to have a long-term accuracy of about six parts per million (0.0006%) at 31 °C (87.8 °F): that is, a typical quartz clock or wristwatch will gain or lose 15 seconds per 30 days (within a normal temperature range of 5 to 35 °C or 41 to 95 °F) or less than a half second clock ...

  8. Eco-Drive - Wikipedia

    en.wikipedia.org/wiki/Eco-Drive

    In 2012 Citizen announced the Eco-Drive RING Concept Model. This watch features a ring-shaped solar cell surrounding the watch case sidewall. [13] [14] In 2018 Citizen announced it developed the Caliber 0100 Eco-Drive prototype autonomous high-accuracy quartz watch movement which is claimed to be accurate to ± 1 second per year. [15]

  9. Casio Wave Ceptor - Wikipedia

    en.wikipedia.org/wiki/Casio_Wave_Ceptor

    These signals transmit the time measured by atomic clocks accurate to one second in millions of years. By synchronizing daily with the signals, the Wave Ceptor watches achieve high accuracy, using a quartz crystal to keep time in the interim.