The Precision of a Rolex Superlative Chronometer is in the order of −two/+two seconds each day – the rate deviation tolerated by the model for the completed check out is noticeably scaled-down than that approved by COSC for Formal certification from the motion by itself. The Superlative Chronometer status is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/