The Precision of a Rolex Superlative Chronometer is on the purchase of −2/+2 seconds a day – the rate deviation tolerated by the brand for your finished enjoy is noticeably scaled-down than that accepted by COSC for official certification with the motion by yourself. The Superlative Chronometer status is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/