Calibre 2236 Is fitted with 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 any position. Lange & Söhne. I’ll make clear why: the German model stepped on to the chronograph phase with their A https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/