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2. Automatic quartz - Wikipedia

   en.wikipedia.org/wiki/Automatic_quartz

   As of 2007, Seiko has sold more than eight million automatic quartz watches. [2] The different calibres of Kinetic watches currently are relatively large and heavy, weighing in at 1/3 of a pound (150 grams) or more on many models. Therefore, most Seiko Kinetic watches are only available in a men's size. Movement calibers： 1M20; 3M21 3M22 ...

3. Seiko - Wikipedia

   en.wikipedia.org/wiki/Seiko

   Seiko later went on to introduce the first quartz chronograph. [5] The year 1969 marked the launch of the Astron, as well as several other wristwatches that Seiko positioned as its own historical models. In the same year, Seiko introduced the Five Sport Speed Timer, the world's first Magic Lever watch with a vertical clutch and column wheel.

4. Spring Drive - Wikipedia

   en.wikipedia.org/wiki/Spring_Drive

   The Seiko Spacewalk is a limited edition Spring Drive model, designed specifically for use in space Spring Drive is a name given to a series of watch movements produced by Epson in Shiojiri . The concept of using a mainspring to power a quartz timing package was first conceived in 1977 by Yoshikazu Akahane (赤羽 好和) at Suwa Seikosha [ 1 ...

5. Pulsar (watch) - Wikipedia

   en.wikipedia.org/wiki/Pulsar_(watch)

   Pulsar is a watch brand and currently a Seiko Watch Corporation of America (SCA) division. Pulsar was the world's first electronic digital watch. Current Pulsar watches are mostly analog and use the same movements in Seikos such as the 7T62 quartz chronograph movement. Pulsar quartz chronograph

6. Astron (wristwatch) - Wikipedia

   en.wikipedia.org/wiki/Astron_(wristwatch)

   In 2019, Seiko released several limited edition Astron models to commemorate the 50th anniversary of the quartz Astron. [5] [6] Among them, the model produced in a limited edition of 50 pieces (3.8 million yen) mimics the original case design and has a rough engraving pattern by craftsmen belonging to Epson's "Micro Artist Workshop". [6]

7. Watch - Wikipedia

   en.wikipedia.org/wiki/Watch

   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, except that electrical power is generated instead of mechanical ...

8. Automatic watch - Wikipedia

   en.wikipedia.org/wiki/Automatic_watch

   Backside view of an automatic watch with exhibition case back, showing its movement.The semicircular central rotor which winds the mainspring is plainly visible. Video of the rotor turning in an automatic wristwatch having a glass back, when the watch is moved by hand

9. Eco-Drive - Wikipedia

   en.wikipedia.org/wiki/Eco-Drive

   Example of the invisible solar cells thanks to VITRO technology, using the CB0021-06E radio-controlled watch model (from 2011 to 2018). Eco-Drive is a model range of watches manufactured and marketed worldwide by Citizen Watch Co., Ltd., powered primarily by light. As of 2007, the company estimated the drive system had eliminated the disposal ...