The Precision of the Rolex Superlative Chronometer is on the purchase of −two/+2 seconds a day – the rate deviation tolerated from the manufacturer for just a finished view is drastically scaled-down than that accepted by COSC for Formal certification of your motion by itself. The Superlative Chronometer standing is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/