Calibre 2236 Is equipped which has a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring features a patented geometry that guarantees the calibre’s regularity in almost any place. The 3rd large action occurred inside the early 1900’s. The shape with the timekeeping apparatus altered in favor https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/