The Precision of the Rolex Superlative Chronometer is of your purchase of −2/+two seconds every day – the speed deviation tolerated through the manufacturer for the concluded observe is significantly scaled-down than that accepted by COSC for Formal certification on the motion by itself. The Superlative Chronometer standing is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/