Calibre 2236 Is equipped that has a Syloxi hairspring that is made by Rolex and patented. This silicon hairspring includes a patented geometry that makes sure the calibre’s regularity in any position. Lange & Söhne. I’ll make clear why: the German manufacturer stepped on to the chronograph stage with their https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/