The Precision of a Rolex Superlative Chronometer is in the buy of −two/+2 seconds per day – the speed deviation tolerated via the brand for the concluded observe is appreciably scaled-down than that approved by COSC for official certification of the motion on your own. The Superlative Chronometer position is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/