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2. Automatic quartz - Wikipedia

   en.wikipedia.org/wiki/Automatic_quartz

   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). In 1991 the company introduced the Kinetic brand name. [4] Today Seiko offers a wide range of watches with various Kinetic movements.

3. Seiko - Wikipedia

   en.wikipedia.org/wiki/Seiko

   Portrait of Kintarō Hattori, 1916. In 1881, Seiko founder Kintarō Hattori opened a watch and jewelry shop called "K. Hattori" (服部時計店) in Tokyo. [12]Kintarō Hattori had been working as clockmaker apprentice since the age of 13, with multiple stints in different watch shops, such as “Kobayashi Clock Shop”, run by an expert technician named Seijiro Sakurai; “Kameda Clock Shop ...

4. MIL-W-46374 - Wikipedia

   en.wikipedia.org/wiki/MIL-W-46374

   MIL-W-46374 is a specification first published on October 30, 1964, [1] for US military watches. [2] The 46374 was specified as an accurate, disposable watch. In its span, it encompassed metal and plastic cased watches with both mechanical and quartz movements. [2] The 46374 replaced the MIL-W-3818, reducing cost and inheriting the dial from ...

5. Spring Drive - Wikipedia

   en.wikipedia.org/wiki/Spring_Drive

   The Spring Drive uses a conventional mainspring [3] and barrel [4] along with automatic and/or stem winding to store energy, just as in a mechanical watch. [3] However, the escapement and balance wheel in mechanical watches is replaced by Seiko's Tri-synchro Regulator system, a phase-locked loop wherein a rotor, which Seiko refers to as a "glide wheel", is powered by the mainspring barrel via ...

6. US military watches - Wikipedia

   en.wikipedia.org/wiki/US_military_watches

   Military watches are believed to have received their name from a German military request for a soldier in a watch house, otherwise known as a guard tower. One story tells that the military wristwatches came into use when a German naval officer needed to know the time but could not pull out a pocket watch since both his hands were busy operating the machine.

7. Watch - Wikipedia

   en.wikipedia.org/wiki/Watch

   Some electronic watches are powered by the movement of the wearer. For instance, Seiko's kinetic-powered quartz watches use the motion of the wearer's arm: turning a rotating weight which causes a tiny generator to supply power to charge a rechargeable battery that runs the watch. The concept is similar to that of self-winding spring movements ...