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2. Automatic watch - Wikipedia

   en.wikipedia.org/wiki/Automatic_watch

   The Rolex Watch Company improved Harwood's design in 1930 and used it as the basis for the Shants Company, in which the centrally mounted semi-circular weight could rotate through a full 360° rather than the about 200° of the 'bumper' winder. Rolex's version also increased the amount of energy stored in the mainspring, allowing it to run ...

3. Rolex - Wikipedia

   en.wikipedia.org/wiki/Rolex

   Rolex watch in original packaging. Rolex (/ ˈ r oʊ l ɛ k s / ⓘ) is a Swiss watch brand and manufacturer based in Geneva, Switzerland. [2] Founded in 1905 as Wilsdorf and Davis by German businessman Hans Wilsdorf and his eventual brother-in-law Alfred Davis in London, the company registered Rolex as the brand name of its watches in 1908 and became Rolex Watch Co. Ltd. in 1915.

4. List of watch manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_watch_manufacturers

   This list is a duplicate of Category:Watch brands, which will likely be more up-to-date and complete. Manufacturers that are named after the founder are sorted by surname. Manufacturers that are named after the founder are sorted by surname.

5. Rolex Cosmograph Daytona - Wikipedia

   en.wikipedia.org/wiki/Rolex_Cosmograph_Daytona

   For instance, a Rolex watch with a serial number starting with 28000 was produced in 1926. Reference 6234 has three smaller sub-dials, to mark the passage of seconds up to 60 seconds (at the 9 o'clock position), minutes up to 30 minutes (at the 3 o'clock position), and hours up to 12 hours (at the 6 o'clock position); all of these match the ...

6. Automatic quartz - Wikipedia

   en.wikipedia.org/wiki/Automatic_quartz

   Automatic quartz is a collective term describing watch movements that combine a self-winding rotor mechanism [1] (as used in automatic mechanical watches) to generate electricity with a piezoelectric quartz crystal as its timing element. Such movements aim to provide the advantages of quartz without the inconvenience and environmental impact of ...

7. John Harwood (watchmaker) - Wikipedia

   en.wikipedia.org/wiki/John_Harwood_(watchmaker)

   In 1922 he moved to the Isle of Man to set up his own watch repair business. [3] Harwood self-winding watch. In 1923, supported by a local businessman, he developed a self-winding wristwatch and applied for a patent in Switzerland, which was granted in September, 1924. His design ensured that the watch could be hermetically sealed against the ...