The Precision of a Rolex Superlative Chronometer is in the get of −2/+2 seconds daily – the rate deviation tolerated because of the model to get a finished view is noticeably scaled-down than that recognized by COSC for official certification with the motion on your own. The Superlative Chronometer position https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/