The Precision of a Rolex Superlative Chronometer is on the order of −two/+two seconds daily – the speed deviation tolerated from the model for the finished enjoy is appreciably scaled-down than that approved by COSC for Formal certification with the movement by itself. The Superlative Chronometer standing is symbolized through https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/