The Precision of the Rolex Superlative Chronometer is with the order of −2/+2 seconds daily – the speed deviation tolerated from the manufacturer for your finished observe is drastically smaller sized than that approved by COSC for Formal certification from the motion alone. The Superlative Chronometer position is symbolized via https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/