The Precision of a Rolex Superlative Chronometer is from the buy of −two/+two seconds a day – the speed deviation tolerated with the manufacturer for the completed look at is drastically scaled-down than that recognized by COSC for Formal certification of your movement on your own. The Superlative Chronometer standing https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/