The Precision of a Rolex Superlative Chronometer is from the order of −two/+two seconds each day – the speed deviation tolerated because of the brand name for a completed view is noticeably scaled-down than that recognized by COSC for Formal certification in the motion by itself. The Superlative Chronometer standing https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/