Seiko caliber 6R15 - the heart of many great watches

December 10, 2018

Seiko caliber 6R15 - the heart of many great watches

Ever since Kintaro Hattori made Japan’s first wristwatch in 1913, the quality of Seiko watches could measure with top Swiss manufacturers. But in 1977, another visionary at Seiko came up with the idea of “the everlasting watch”. Around 600 prototypes and almost 30 years later, Seiko made his famous Spring Drive that made the difference among mechanical watches because it brought a new level of accuracy.

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