Calibre 2236 Is equipped having a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring features a patented geometry that makes certain the calibre’s regularity in any placement. ZENITH launches the one hundred thirty five-Observatoire limited version, making the acclaimed 135 calibre, serial winner on the Intercontinental https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/