Grand Seiko has revealed what it claims to be the most accurate mainspring-powered watch ever made at Watches and Wonders.
The Seiko 5 isn't the only affordable watch worthy of your wrist. For more budget ticker intel, check our guide to the best ...
Learn more There are different ways to measure timekeeping accuracy. Saying that Seiko’s most accurate watch is any Grand Seiko Spring Drive is correct because it is the brand’s mechanical movement ...
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