The Precision of a Rolex Superlative Chronometer is on the order of −two/+two seconds a day – the rate deviation tolerated through the brand name for a completed observe is significantly smaller than that recognized by COSC for official certification in the motion on your own. The Superlative Chronometer position https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/
Chronometer watches - An Overview
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