Calibre 2236 Is equipped using a Syloxi hairspring that is made by Rolex and patented. This silicon hairspring incorporates a patented geometry that ensures the calibre’s regularity in any placement. ZENITH launches the a hundred thirty five-Observatoire minimal version, creating the acclaimed a hundred thirty five calibre, serial winner with https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/