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with spring drive self-winding watch (rolling by hand] Grand SEIKO (GRAND SEIKO) Heritage Collection spring drive standard design SBGA437 [regular article] SEIKO | SEIKO mail order | BicCamera. com
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Grand Seiko Spring Drive 8-Days and what's so "Seiko" about the Spring Drive technology - Monochrome Watches
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Grand Seiko Spring Drive 8-Days and what's so "Seiko" about the Spring Drive technology - Monochrome Watches
![Slimmer, more precise and more powerful. A new Spring Drive movement marks a new beginning for Grand Seiko. | Grand Seiko Slimmer, more precise and more powerful. A new Spring Drive movement marks a new beginning for Grand Seiko. | Grand Seiko](https://www.grand-seiko.com/be-en/-/media/Images/GlobalEn/GrandSeiko/Home/news/20200305-10/2020030510img01jpg.jpg)
Slimmer, more precise and more powerful. A new Spring Drive movement marks a new beginning for Grand Seiko. | Grand Seiko
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