Calibre 2236 Is equipped which has a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring has a patented geometry that makes certain the calibre’s regularity in almost any posture. Lange & Söhne. I’ll clarify why: the German model stepped on to the chronograph stage with their https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/