The Precision of a Rolex Superlative Chronometer is of the purchase of −2/+2 seconds per day – the rate deviation tolerated with the brand for just a completed observe is noticeably scaled-down than that accepted by COSC for official certification from the movement by yourself. The Superlative Chronometer status is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/