Calibre 2236 Is fitted which has a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring features a patented geometry that makes sure the calibre’s regularity in almost any placement. Lange & Söhne. I’ll describe why: the German model stepped onto the chronograph phase with their A https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/