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Grand Seiko Movement Series

A Look Inside Grand Seiko’s 9R Spring Drive Movement

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Spring Drive was, for a long time, something I thought I understood, at least on …

A Look Inside Grand Seiko’s 9S Hi-Beat Mechanical Movement

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High-beat movements, or calibers that run at 36,000 beats-per-hour/10 beats-per-second, are relatively uncommon in the industry today. The prevailing standard for quite some time now …

A Look Inside Grand Seiko’s 9S Mechanical Movement

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Grand Seiko is no stranger to high-grade, high-accuracy mechanical movements, and today’s Grand Seiko calibers are built on the brand’s storied heritage of mechanical excellence. …
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A Look Inside Grand Seiko’s 9F Quartz Movement

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Ever wondered what makes Grand Seiko's 9F quartz calibers so good? We break it down.