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  2. List of ETA Movements - Wikipedia

    en.wikipedia.org/wiki/List_of_ETA_Movements

    Chronograph mechanism with cams, 2 push buttons, chronograph 60 seconds, 30 minutes and 12 hours counters, date indication by hand, day, month, and moon phases showing in dial apertures, quick correction of date, day, month, and moon phases, 24 hours hand

  3. Nicolas Auguste Tissot - Wikipedia

    en.wikipedia.org/wiki/Nicolas_Auguste_Tissot

    Nicolas Auguste Tissot (French:; March 16, 1824 – July 14, 1907) was a French cartographer, who in 1859 and 1881 published an analysis of the distortion that occurs on map projections. He devised Tissot's indicatrix , or distortion circle, which when plotted on a map will appear as an ellipse whose elongation depends on the amount of ...

  4. Tissot - Wikipedia

    en.wikipedia.org/wiki/Tissot

    Tissot watches are classified by the Swatch Group as "mid-range market" products. [9] Tissot is an official timekeeper for the world championships in cycling, motorcycling, fencing and ice hockey, etc. Tissot was a sponsor for the Formula One car-racing teams Lotus, Renault, and Sauber.

  5. Complication (horology) - Wikipedia

    en.wikipedia.org/wiki/Complication_(horology)

    The complications include the date of Easter, sidereal time, and a 2800-star celestial chart. The Supercomplication delivered to Henry Graves, Jr. in 1933 has 24 complications. The watch was reportedly the culmination of a watch arms race between Graves and James Ward Packard. The Super-complication took three years to design and five to build ...

  6. Tissot's indicatrix - Wikipedia

    en.wikipedia.org/wiki/Tissot's_indicatrix

    The Behrmann projection with Tissot's indicatrices The Mercator projection with Tissot's indicatrices. In cartography, a Tissot's indicatrix (Tissot indicatrix, Tissot's ellipse, Tissot ellipse, ellipse of distortion) (plural: "Tissot's indicatrices") is a mathematical contrivance presented by French mathematician Nicolas Auguste Tissot in 1859 and 1871 in order to characterize local ...

  7. Mathey-Tissot - Wikipedia

    en.wikipedia.org/wiki/Mathey-Tissot

    Mathey-Tissot no longer produces its own watch movements in house. Instead, the company customizes mechanical and quartz watches with movements sourced from others. [4] Its logo is similar to the "peace symbol" of the Campaign for Nuclear Disarmament, but turned upside-down, with the words Mathey-Tissot in manuscript, above the printed words "since 1886".

  8. Balance wheel - Wikipedia

    en.wikipedia.org/wiki/Balance_wheel

    A balance wheel, or balance, is the timekeeping device used in mechanical watches and small clocks, analogous to the pendulum in a pendulum clock.It is a weighted wheel that rotates back and forth, being returned toward its center position by a spiral torsion spring, known as the balance spring or hairspring.

  9. COSC - Wikipedia

    en.wikipedia.org/wiki/COSC

    That is, the watch should not delay at all, and the upper limit is 5 seconds fast in 24 hours. The criterion of resistance to magnetic fields is innovative. Until now, the ISO 764 Horology — Magnetic resistant watches standard defines that an antimagnetic watch must support a magnetic field of 4,800 A/m, which corresponds to 60 gauss. METAS ...