The Precision of the Rolex Superlative Chronometer is on the order of −two/+2 seconds per day – the rate deviation tolerated with the brand for a finished view is drastically scaled-down than that accepted by COSC for Formal certification with the motion by yourself. The Superlative Chronometer position is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/