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  2. Seiko - Wikipedia

    en.wikipedia.org/wiki/Seiko

    Seiko Group Corporation (セイコーグループ株式会社, Seikō Gurūpu kabushiki gaisha), commonly known as Seiko ( / ˈseɪkoʊ / SAY-koh, Japanese: [seːkoː] ), is a Japanese maker of watches, clocks, electronic devices, semiconductors, jewelry, and optical products. Founded in 1881 by Kintarō Hattori in Tokyo, Seiko introduced the ...

  3. Diving watch - Wikipedia

    en.wikipedia.org/wiki/Diving_watch

    Monitoring dive time by the diver. A diving watch, also commonly referred to as a diver's or dive watch, is a watch designed for underwater diving that features, as a minimum, a water resistance greater than 1.1 MPa (11 atm), the equivalent of 100 m (330 ft). The typical diver's watch will have a water resistance of around 200 to 300 m (660 to ...

  4. Automatic quartz - Wikipedia

    en.wikipedia.org/wiki/Automatic_quartz

    Seiko AGS SCUBA Diver 200m 5M23-6A60, 1993. 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 ...

  5. Citizen Watch - Wikipedia

    en.wikipedia.org/wiki/Citizen_Watch

    Citizen Watch Co., Ltd. Citizen Watch Co., Ltd. (シチズン時計株式会社, Shichizun tokei Kabushiki-gaisha) is an electronics company primarily known for its watches and is the core company of a Japanese global corporate group based in Nishitokyo, Tokyo, Japan. In addition to Citizen brand watches, it is the parent of American watch ...

  6. Spring Drive - Wikipedia

    en.wikipedia.org/wiki/Spring_Drive

    Spring Drive. 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] (now a part of Epson after a 1985 merger). [2] Specified to one second accuracy per day ...

  7. US military watches - Wikipedia

    en.wikipedia.org/wiki/US_military_watches

    18W8 (INT) wristwatch (watertight) "buship" "canteen" dive watch. An iconic post military watch and a result of the Navy's FSX-797, colloquially known as the US Navy's Bureau of Ships "canteen watch", started out with Jacques Depollier & Sons' waterproof and dustproof strap watch. The first known example of the now common "screw down crown ...

  8. List of watch manufacturers - Wikipedia

    en.wikipedia.org/wiki/List_of_watch_manufacturers

    Samsung Galaxy Watch; Sandoz watches; Schwarz Etienne; Sea-Gull; Sector; Seiko; Seiko Epson; Seiko Instruments; Seikosha; Sekonda; Shinola Detroit; Sinn; SSIH ...

  9. Seiko Group - Wikipedia

    en.wikipedia.org/wiki/Seiko_Group

    Seiko Group (セイコー・グループ, Seikō Gurūpu) is a Japanese corporate group consisting of three core companies Seiko Group Corp. (Seiko), Seiko Instruments Inc. (SII) and Seiko Epson Corp (Epson). The three companies are linked by a common thread of timepiece technology. Epson has established its own brand image and rarely uses 'Seiko'.

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