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Some Grand Seiko timepieces also incorporate the company's Spring Drive movement, a movement that is a combination of both automatic and quartz timekeeping methods, leading to unparalleled accuracy in the world of automatic wristwatches. The most famous example is the SBGA011 Grand Seiko "Snowflake", housing the 9R Spring Drive movement. With ...
Samsung; Sandoz watches; Schwarz Etienne; Sea-Gull; Sector; Seiko; Seiko Instruments; Seikosha; Sekonda; Shinola Detroit; Sinn; SSIH (previous holding company, now ...
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 ...
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 ...
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Yoshikazu Akahane (died 1999), Japanese engineer, creator of Seiko's Spring Drive mechanical movement regulated by a quartz oscillator instead of a traditional escapement. Roberto Bertotti (born 1967), Italian watchmaker, fixing most of the watches, clocks, chronometers, Pendulum clocks, etc. Workshop in Rovereto, Italy.