The Precision of a Rolex Superlative Chronometer is from the get of −2/+2 seconds daily – the speed deviation tolerated through the manufacturer for any finished watch is noticeably lesser than that approved by COSC for Formal certification from the motion by yourself. The Superlative Chronometer status is symbolized from https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/