The Precision of the Rolex Superlative Chronometer is from the get of −two/+2 seconds daily – the speed deviation tolerated via the brand name for your finished look at is noticeably smaller sized than that recognized by COSC for Formal certification from the movement by itself. The Superlative Chronometer position https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/