A Close Look At The Grand Seiko Caliber 9F 25th Anniversary Limited Edition Watch

Grand Seiko Caliber 9F 25th Anniversary watch, ref. number SBGT241.

In the late 1980s watches powered by quartz movements were undergoing a series of rapid innovations as brands resolved to add new functions to the quartz caliber.  At Seiko, the  Grand Sieko team chose to focus to the improvement and refinement of precision and durability and in 1993, Grand Seiko  unveiled a new quartz caliber:…

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