The Precision of a Rolex Superlative Chronometer is of your purchase of −two/+two seconds every day – the rate deviation tolerated from the brand name for the concluded look at is noticeably scaled-down than that accepted by COSC for official certification in the motion by itself. The Superlative Chronometer position https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/