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  2. Quartz clock - Wikipedia

    en.wikipedia.org/wiki/Quartz_clock

    Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz clocks and watches are at least an order of magnitude more accurate than mechanical clocks. Generally, some form of digital logic ...

  3. List of ETA Movements - Wikipedia

    en.wikipedia.org/wiki/List_of_ETA_Movements

    No. Yes. Yes. ETACHRON. Chronograph mechanism with cams, 3 push buttons, chronograph 60 seconds, 30 minutes and 12 hours counters, date in window, date correction by means of push button at 10 o’clock. 7754 [24] Yes. Yes. small second.

  4. Omega Electroquartz - Wikipedia

    en.wikipedia.org/wiki/Omega_Electroquartz

    The Omega Electroquartz was introduced in 1969 as the first Swiss quartz watch to be produced. It was the collaboration of 20 Swiss watch companies and the movement was utilised by Rolex, Patek Phillipe and Omega amongst others. The Beta 21 movement used in the Electroquartz was accurate to 5 seconds per month, far better than any automatic or ...

  5. Radio clock - Wikipedia

    en.wikipedia.org/wiki/Radio_clock

    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. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    The Shortt–Synchronome clock, an electrical driven pendulum clock designed in 1921, was the first clock to be a more accurate timekeeper than the Earth itself. [167] A succession of innovations and discoveries led to the invention of the modern quartz timer. The vacuum tube oscillator was invented in 1912. [168]

  7. Omega Chrono-Quartz - Wikipedia

    en.wikipedia.org/wiki/Omega_Chrono-Quartz

    The Omega Chrono-Quartz was the world's first digital/analogue chronograph. It was invented by Omega SA. The watch launched at the 1976 Montreal Olympic Games and was Omega's flagship chronograph at that time. The watch is noteworthy as it was the first chronograph wristwatch in the world to combine analogue display for the time functions and a ...

  8. COSC - Wikipedia

    en.wikipedia.org/wiki/COSC

    Founded in its current form in 1973, the COSC is a Swiss non-profit organization that tests chronometers that are Swiss Made. COSC is an acronym for the organization's French language name, Contrôle Officiel Suisse des Chronomètres. COSC testing generally applies to watches manufactured or assembled in Switzerland. [1]

  9. Omega Seamaster - Wikipedia

    en.wikipedia.org/wiki/Omega_Seamaster

    Manual / Automatic / Quartz. Introduced. 1948. The Omega Seamaster is a line of automatic winding mechanical diving watches from Omega with a history that can be traced back to the original water-resistant dress-style watch released in 1948. The Seamaster collection is perhaps best known today for the Seamaster Diver Professional 300m model ...

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