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2. Automatic watch - Wikipedia

   en.wikipedia.org/wiki/Automatic_watch

   The earliest reference to self-winding watches is at the end of 1773 when a newspaper reported that Joseph Tlustos had invented a watch that did not need to be wound. [8] But his idea was probably based on the myth of perpetual motion, and it is unlikely that it was a practical solution to the problem of self-winding watches.

3. 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 ...

4. John Harwood (watchmaker) - Wikipedia

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

   The watches were first shown at the Basel Fair in 1926. [4] He set up the Harwood Self-Winding Watch Company in 1928 to market the watches in the UK, but the company failed in September 1931, not having sufficient financial resources to withstand the effects of the Great Depression. The watches also proved difficult to mass-produce and very ...

5. Miyota (watch movement manufacturer) - Wikipedia

   en.wikipedia.org/wiki/Miyota_(watch_movement...

   Miyota produces various 'standard' and 'premium' grade mechanical movements for automatic wristwatches.. The Miyota 8215 is an entry level non-hacking-earlier versions twenty-one jewel three-hand with date automatic wristwatch movement with a uni-directional winding system (left rotation) with an accuracy of -20 to +40 seconds per day, and a power reserve of over 40 hours.

6. Elgin National Watch Company - Wikipedia

   en.wikipedia.org/wiki/Elgin_National_Watch_Company

   The company built the Elgin National Watch Company Observatory in 1910 to maintain scientifically precise times in their watches. The company produced many of the self-winding wristwatch movements made in the United States, beginning with the 607 and 618 calibers (which were bumper wind) and the calibers 760 and 761 (30 and 27 jewels respectively).

7. Watch - Wikipedia

   en.wikipedia.org/wiki/Watch

   The first self-winding mechanism was invented for pocket watches in 1770 by Abraham-Louis Perrelet, [57] but the first "self-winding", or "automatic", wristwatch was the invention of a British watch repairer named John Harwood in 1923. This type of watch winds itself without requiring any special action by the wearer.