The Precision of the Rolex Superlative Chronometer is with the order of −two/+two seconds every day – the speed deviation tolerated with the model to get a finished look at is appreciably lesser than that accepted by COSC for Formal certification of your movement on your own. The Superlative Chronometer https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/
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