The Precision of the Rolex Superlative Chronometer is from the get of −two/+2 seconds each day – the rate deviation tolerated via the brand for a completed watch is noticeably smaller than that recognized by COSC for Formal certification with the motion alone. The Superlative Chronometer position is symbolized via https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/