The Precision of the Rolex Superlative Chronometer is of the get of −two/+2 seconds daily – the rate deviation tolerated via the model for any finished watch is appreciably lesser than that accepted by COSC for Formal certification in the movement on your own. The Superlative Chronometer position is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/