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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 ...
Seiko Watch Corp., a subsidiary of Seiko Holdings Corp., markets SEIKO watches while Seiko Instruments Inc. and Seiko Epson Corp. manufacture their movements. [2] Time Module (TMI), a member of the Seiko Group, was established in 1987 with funding from Seiko Watch Company, Seiko Instruments Inc., and Seiko Epson Corp. to manufacture watch ...
An automatic watch, also known as a self-winding watch or simply an automatic, is a mechanical watch where the natural motion of the wearer provides energy to wind the mainspring, making manual winding unnecessary if worn enough. [ 1] It is distinguished from a manual watch in that a manual watch must have its mainspring wound by hand at ...
Pulsar (watch) A modern analog 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.
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 ...
Quartz movement of the Seiko Astron, 1969. The quartz crisis (Swiss) or quartz revolution (American, Japan and other countries) was the advancement in the watchmaking industry caused by the advent of quartz watches in the 1970s and early 1980s, that largely replaced mechanical watches around the world.
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