The Precision of the Rolex Superlative Chronometer is with the order of −2/+2 seconds a day – the rate deviation tolerated by the brand for your finished enjoy is substantially scaled-down than that recognized by COSC for Formal certification of the movement alone. The Superlative Chronometer position is symbolized with https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/