The Precision of the Rolex Superlative Chronometer is from the buy of −two/+2 seconds a day – the rate deviation tolerated via the model for just a concluded enjoy is significantly scaled-down than that accepted by COSC for Formal certification on the motion on your own. The Superlative Chronometer position https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/