The Precision of a Rolex Superlative Chronometer is of the get of −2/+two seconds every day – the speed deviation tolerated via the model for a concluded watch is drastically scaled-down than that recognized by COSC for official certification on the motion by yourself. The Superlative Chronometer standing is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/