The Precision of a Rolex Superlative Chronometer is of the get of −2/+two seconds every day – the rate deviation tolerated with the brand for the finished look at is considerably scaled-down than that approved by COSC for Formal certification of the movement alone. The Superlative Chronometer position is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/