Calibre 2236 Is equipped which has a Syloxi hairspring that is made by Rolex and patented. This silicon hairspring features a patented geometry that makes sure the calibre’s regularity in almost any placement. six miles, or 55.seven km) at the conclusion of a 6 weeks’ voyage. (The geographical mile is https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/