The Precision of the Rolex Superlative Chronometer is of the order of −two/+2 seconds on a daily basis – the speed deviation tolerated from the brand for just a concluded check out is considerably smaller than that accepted by COSC for official certification from the movement on your own. The https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/
Chronometer watches - An Overview
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