The Precision of a Rolex Superlative Chronometer is in the buy of −two/+2 seconds a day – the speed deviation tolerated from the model for your concluded enjoy is noticeably scaled-down than that acknowledged by COSC for official certification on the movement by yourself. The Superlative Chronometer status is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/