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Rolex Daytona 116520 vs. Grand Seiko SBGC013 Round 1: Accuracy
Dec 30, 2015,11:56 AM
Source: WatchTime October 2001
Rolex is +-2 Seconds per Day
VS.
Source: http://www.grand-seiko.com/
+-10 Seconds per month, that would make it .33 seconds per day
So Round 1 goes to the Grand Seiko SBGC013
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