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High-beat precision and three days of power reserve. Introducing the first Grand Seiko mechanical chronograph, the Tentagraph. | Grand Seiko
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Grand Seiko Tentagraph Hi-Beat 36000 Automatic Chronograph SLGC001 Watch – Grand Seiko Official Boutique
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Hands-On: Grand Seiko Tentagraph SLGC001 Watch Is Brand's First-Ever Mechanical Chronograph | aBlogtoWatch
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