The Precision of the Rolex Superlative Chronometer is of your buy of −2/+two seconds each day – the rate deviation tolerated by the model for a finished observe is drastically scaled-down than that acknowledged by COSC for official certification in the motion by yourself. The Superlative Chronometer standing is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/