Calibre 2236 Is equipped by using a Syloxi hairspring that is made by Rolex and patented. This silicon hairspring contains a patented geometry that ensures the calibre’s regularity in any situation. The third big phase took place inside the early 1900’s. The shape on the timekeeping equipment adjusted in favor https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/