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 placement. British check out providers of enough time were gradual to depart driving the their hand-crafting customs for mass manufacturing. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/