The Precision of a Rolex Superlative Chronometer is of your order of −2/+2 seconds a day – the rate deviation tolerated by the brand name for the concluded observe is drastically scaled-down than that accepted by COSC for Formal certification with the motion on your own. The Superlative Chronometer standing https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/