The Precision of the Rolex Superlative Chronometer is of your purchase of −2/+2 seconds a day – the speed deviation tolerated from the manufacturer for any finished view is significantly scaled-down than that approved by COSC for Formal certification of the movement on your own. The Superlative Chronometer standing is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/