Calibre 2236 Is equipped by using a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring features a patented geometry that ensures the calibre’s regularity in any place. ZENITH launches the a hundred thirty five-Observatoire minimal edition, building the acclaimed 135 calibre, serial winner on the Intercontinental https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/