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Seiko - Spring Drive Accuracy. A brief examination for real performance and long answer of if it matters.
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I've owned my Spring Drive Grand Seiko (SBGA413) for 1 month and the accuracy blew me away | WatchCrunch
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Amazon.com: Grand Seiko Heritage High-Intensity Titanium Hi Beat GMT SBGJ213 : Grand Seiko: Clothing, Shoes & Jewelry
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Grand Seiko Hi-Beat 36000 GMT Limited Edition SBGJ227 Watch Brings The Popular Green Dial GMT Back | aBlogtoWatch
![WTS] Grand Seiko High Accuracy Quartz 36mm Reference 8j56-8010 for $479 (price reduced). : r/Watchexchange WTS] Grand Seiko High Accuracy Quartz 36mm Reference 8j56-8010 for $479 (price reduced). : r/Watchexchange](https://preview.redd.it/wts-grand-seiko-high-accuracy-quartz-36mm-reference-8j56-v0-l93kp1qqiezb1.jpg?auto=webp&s=00c8c754e4686a17d5dc20d01ffc4da5011b7712)