Calibre 2236 Is equipped with a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring includes a patented geometry that guarantees the calibre’s regularity in almost any placement. James L. January 14, 2023 The rationale I say that I am shocked is because of Certina staying the https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/