Calibre 2236 Is equipped which has a Syloxi hairspring that is made by Rolex and patented. This silicon hairspring contains a patented geometry that assures the calibre’s regularity in any posture. Pierre Jaquet-Droz (1721-1790), founding father of the modern watchmaking dwelling that bears his name, was not simply Probably the https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/