The Precision of a Rolex Superlative Chronometer is of your buy of −two/+2 seconds per day – the rate deviation tolerated because of the brand for your concluded view is noticeably scaled-down than that accepted by COSC for Formal certification from the motion by yourself. The Superlative Chronometer status is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/