Calibre 2236 Is fitted using 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 almost any posture. Tissot traces its extended history back again to 1853, when it absolutely was Started by The daddy-son workforce https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/