The Precision of the Rolex Superlative Chronometer is of the get of −2/+two seconds daily – the rate deviation tolerated because of the manufacturer for a finished watch is considerably scaled-down than that accepted by COSC for Formal certification in the movement by yourself. The Superlative Chronometer position is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/