Calibre 2236 Is equipped having a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring contains a patented geometry that ensures the calibre’s regularity in any posture. The 3rd large move occurred inside the early 1900’s. The shape of the timekeeping equipment altered in favor of the https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/