Calibre 2236 Is fitted that has a Syloxi hairspring that is made by Rolex and patented. This silicon hairspring includes a patented geometry that ensures the calibre’s regularity in almost any position. Pierre Jaquet-Droz (1721-1790), founding father of the modern watchmaking residence that bears his name, was not only Just https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/