The Grand Seiko Spring Drive is a mechanical movement exclusive to the Japanese watch company. It mimics the accuracy and operation of a quartz movement without a secondary power source. It was a ...
Gear Patrol on MSN
Grand Seiko Once Again Raises the Bar for Mechanical Timekeeping
Seiko exponentially improves the accuracy of its Spring Drive movement, now measured in seconds per year, rather than month.
Grand Seiko has launched a new Spring Drive movement that’s accurate to within 20 seconds per year The revolutionary hybrid engine debuts in two striking new models One of the models, SLGB003, also ...
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