The Precision of the Rolex Superlative Chronometer is from the purchase of −two/+2 seconds each day – the speed deviation tolerated from the brand for just a completed observe is noticeably smaller sized than that approved by COSC for Formal certification from the movement by itself. The Superlative Chronometer standing https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/