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The Spring Drive uses a conventional mainspring and barrel along with automatic and/or stem winding to store energy, just as in a mechanical watch. 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 a stator.
In 1998, Grand Seiko was released with the first new mechanical movement in 20 years. [5] In 1999, Seiko launched Spring Drive, the world's first mechanical wristwatch with the accuracy of quartz. [5] In 2004, the Astron, launched in 1969, was selected as an IEEE milestone. In the same year, Seiko began operating the Shizukuishi Watch Studio ...
Analogue. Introduced. December 25, 1969. Quartz Movement of the Seiko Astron, 1969 (Deutsches Uhrenmuseum, Inv. Inv. 2010-006) The Astron wristwatch, formally known as the Seiko Quartz-Astron 35SQ, was the world's first "quartz clock" wristwatch. It is now registered on the List of IEEE Milestones as a key advance in electrical engineering .
The company has developed many timepiece technologies, such as the world's first portable quartz timer (Seiko QC-951) in 1963, the world's first quartz watch (Seiko Quartz Astron 35SQ) in 1969, the first automatic power-generating quartz watch (Seiko Auto-Quartz) in 1988, and the Spring Drive watch movement in 1999.
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'.
The parent company of Saks Fifth Avenue has signed a deal to buy upscale rival Neiman Marcus Group, which owns Neiman Marcus and Bergdorf Goodman stores, for $2.65 billion, with online behemoth ...
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