The Precision of the Rolex Superlative Chronometer is of your purchase of −two/+2 seconds daily – the speed deviation tolerated because of the brand for your finished watch is drastically scaled-down than that accepted by COSC for Formal certification in the motion on your own. The Superlative Chronometer status is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/