The Precision of the Rolex Superlative Chronometer is on the purchase of −2/+two seconds each day – the rate deviation tolerated via the brand name for the finished watch is drastically scaled-down than that approved by COSC for Formal certification with the motion by itself. The Superlative Chronometer status is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/