The Precision of the Rolex Superlative Chronometer is on the order of −two/+2 seconds per day – the rate deviation tolerated by the model to get a concluded look at is noticeably scaled-down than that approved by COSC for Formal certification with the movement alone. The Superlative Chronometer position is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/