Calibre 2236 Is fitted which has a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring has a patented geometry that makes certain the calibre’s regularity in any place. Tissot traces its extensive heritage back to 1853, when it absolutely was Launched by The daddy-son group of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/