A Look Inside Grand Seiko’s 9R Spring Drive Movement
Spring Drive was, for a long time, something I thought I understood, at least on a rudimentary level. My knowledge came primarily from research I had done myself, as well as explanations I’d gotten from enthusiasts who themselves likely only had a cursory understanding of the movement’s most basic mechanics. But it wasn?t until I visited Japan last year and had an opportunity to get a closer look at Spring Drive that I truly grasped its mechanical genius.
Grand Seiko’s 9R65 Spring Drive caliber.
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