The Precision of a Rolex Superlative Chronometer is with the buy of −2/+2 seconds a day – the rate deviation tolerated with the model for a completed enjoy is noticeably smaller than that accepted by COSC for Formal certification with the movement by itself. The Superlative Chronometer position is symbolized https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/