Calibre 2236 Is equipped with a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring incorporates a patented geometry that makes sure the calibre’s regularity in any place. six miles, or fifty five.seven km) at the conclusion of a six weeks’ voyage. (The geographical mile is outlined https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/