The Precision of a Rolex Superlative Chronometer is from the order of −two/+2 seconds each day – the speed deviation tolerated from the manufacturer to get a completed view is considerably smaller than that accepted by COSC for official certification on the motion alone. The Superlative Chronometer standing is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/
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