Calibre 2236 Is equipped which has a Syloxi hairspring that is made by Rolex and patented. This silicon hairspring has a patented geometry that makes certain the calibre’s regularity in almost any posture. Pierre Jaquet-Droz (1721-1790), founding father of the fashionable watchmaking house that bears his identify, was not only https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/