The Precision of a Rolex Superlative Chronometer is from the get of −two/+two seconds a day – the speed deviation tolerated by the model for the completed view is noticeably lesser than that acknowledged by COSC for Formal certification from the movement alone. The Superlative Chronometer standing is symbolized because https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/