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  2. Pocket watch - Wikipedia

    en.wikipedia.org/wiki/Pocket_watch

    Invented by Adrien Philippe in 1842 and commercialized by Patek Philippe & Co. in the 1850s, the stem-wind, stem-set movement did away with the watch key which was a necessity for the operation of any pocket watch up to that point. The first stem-wind and stem-set pocket watches were sold during the Great Exhibition in London in 1851 and the ...

  3. Wheel train - Wikipedia

    en.wikipedia.org/wiki/Wheel_train

    It is called the third wheel because the mainspring barrel is the first wheel and the center wheel is the second wheel in the gear train. Fourth wheel which, in clocks and watches with the second hand in a subdial, turns once per minute and the arbor projects through the face and holds the second hand. The fourth wheel also turns the escape ...

  4. Watch - Wikipedia

    en.wikipedia.org/wiki/Watch

    A so-called mystery watch, it is the first transparent watch, [50] c. 1890. The movement is fitted with a cylinder escapement. The movement is fitted with a cylinder escapement. The movement of a watch is the mechanism that measures the passage of time and displays the current time (and possibly other information including date, month, and day ...

  5. Stem - Wikipedia

    en.wikipedia.org/wiki/Stem

    Stem, part of a compound variable in the Rexx computer programming language; Stem (bicycle part), connecting the handlebars to the steerer tube of a bicycle fork; Stem (ship), the most forward part of a boat or ship's bow; Stem, part of a watch

  6. Automatic quartz - Wikipedia

    en.wikipedia.org/wiki/Automatic_quartz

    The first such watch was released in Germany in January 1988 and April of the same year in Japan (under the name Auto-Quartz). [3] The watches had an average monthly rate of ±15 sec and provided 75 hours of continuous operation when fully powered. Early automatic quartz movements were called AGS (Automatic Generating System).

  7. Mechanical watch - Wikipedia

    en.wikipedia.org/wiki/Mechanical_watch

    A mechanical watch is a watch that uses a clockwork mechanism to measure the passage of time, as opposed to quartz watches which function using the vibration modes of a piezoelectric quartz tuning fork, or radio watches, which are quartz watches synchronized to an atomic clock via radio waves.

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  9. Movement (clockwork) - Wikipedia

    en.wikipedia.org/wiki/Movement_(clockwork)

    A modern bridge watch movement. Watch movements come in various shapes to fit different case styles, such as round, tonneau, rectangular, rectangular with cut corners, oval and baguette, and are measured in lignes, or in millimetres. Each specific watch movement is called a caliber. [3]