Calibre 2236 Is fitted by using a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring incorporates a patented geometry that ensures the calibre’s regularity in any place. To advertise the art of watchmaking to as Lots of individuals as is possible, ZENITH gets the very first https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/