The Precision of a Rolex Superlative Chronometer is of the order of −2/+2 seconds a day – the rate deviation tolerated from the brand for any finished view is appreciably lesser than that approved by COSC for Formal certification in the movement by yourself. The Superlative Chronometer standing is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/