The Precision of a Rolex Superlative Chronometer is on the get of −two/+2 seconds each day – the speed deviation tolerated by the manufacturer for just a finished watch is drastically scaled-down than that recognized by COSC for Formal certification of your movement by yourself. The Superlative Chronometer status is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/