The Precision of the Rolex Superlative Chronometer is from the get of −two/+2 seconds every day – the rate deviation tolerated through the brand for just a completed view is noticeably scaled-down than that acknowledged by COSC for official certification of the movement on your own. The Superlative Chronometer position https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/