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 sure the calibre’s regularity in any position. There you've it, 5 brands that have performed an enormous function in the event on the chronograph. When https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/