Calibre 2236 Is equipped that has a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring incorporates a patented geometry that makes certain the calibre’s regularity in almost any situation. Tissot traces its extended background again to 1853, when it absolutely was Established by The daddy-son crew https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/