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The best mechanical watch ever, with a mechanical caliber matching the Grand Seiko and a precision stricter than the Contrôle Officiel Suisse des Chronomètres (COSC) Standard (new GS standard). It has been refining, engineered with a new hair spring, new main spring, precise MEMS-based (processing technology used for semiconductors and other ultra-precision components) escapement, 10-beat technology, and 3-day self-winding technology.

Name 9S5
Time/Period 1998