Calibre 2236 Is fitted by using a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring contains a patented geometry that makes sure the calibre’s regularity in almost any position. Lange & Söhne. I’ll demonstrate why: the German brand name stepped on to the chronograph stage with https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/