The Precision of a Rolex Superlative Chronometer is of the buy of −two/+2 seconds daily – the speed deviation tolerated through the brand for just a concluded watch is noticeably smaller than that approved by COSC for official certification on the motion by yourself. The Superlative Chronometer status is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/