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