The Precision of the Rolex Superlative Chronometer is of your buy of −two/+two seconds each day – the speed deviation tolerated with the brand for your finished check out is noticeably scaled-down than that approved by COSC for official certification with the movement on your own. The Superlative Chronometer standing https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/