The Precision of a Rolex Superlative Chronometer is in the purchase of −two/+two seconds a day – the rate deviation tolerated via the brand for your completed observe is noticeably more compact than that accepted by COSC for Formal certification with the motion alone. The Superlative Chronometer status is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/