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2. Seiko - Wikipedia

   en.wikipedia.org/wiki/Seiko

   In 2021, Akio Naito, President of the Seiko Watch Corporation, [37] said that enthusiasts' respect for the brand can "influence the wider range of consumers." [38] This influence can be seen in the Prospex range, where Seiko fans' nicknames resulted in the company eventually adopting these product names. For example, Seiko's own London boutique ...

3. Automatic quartz - Wikipedia

   en.wikipedia.org/wiki/Automatic_quartz

   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; 3M62; 4M21; 4M71; 5D22 5D44 (Direct Drive) 5D88 (Direct Drive Moonphase) 5J21 5J22 ...

4. Astron (wristwatch) - Wikipedia

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

   The Astron was unveiled in Tokyo on December 25, 1969, after ten years of research and development at Suwa Seikosha (currently named Seiko Epson), a manufacturing company of Seiko Group. Within one week 100 gold watches had been sold, at a retail price of 450,000 yen ( US$1,250 (equivalent to $10,386 in 2023)) each (at the time, equivalent to ...

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. Seikosha - Wikipedia

   en.wikipedia.org/wiki/Seikosha

   2009 — Seiko Instruments becomes a wholly owned subsidiary of Seiko Holdings. 2020 — Seiko Precision transfers its business operations to Seiko Time Systems Inc. and Seiko Solutions Inc. and dissolves. 2020 — Seiko Instruments transfers its watch business (development and manufacturing of the Seiko timepieces) to Seiko Watch Corporation.

7. Seiko Group - Wikipedia

   en.wikipedia.org/wiki/Seiko_Group

   Seiko, SII and Epson logos. Three companies share "Seiko" in their official names but have different corporate visual identities.. Seiko Group (セイコー・グループ, Seikō Gurūpu) was a Japanese corporate group consisting of three core companies Seiko Holdings Corp. (Seiko; f/k/a K. Hattori & Co., Hattori Seiko), Seiko Instruments Inc. (SII; f/k/a Daini Seikosha, Seiko Instruments ...