The Precision of a Rolex Superlative Chronometer is on the buy of −2/+2 seconds every day – the speed deviation tolerated by the manufacturer for your concluded watch is noticeably lesser than that recognized by COSC for Formal certification of the movement on your own. The Superlative Chronometer position is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/