Calibre 2236 Is fitted having a Syloxi hairspring that is made by Rolex and patented. This silicon hairspring provides a patented geometry that assures the calibre’s regularity in any placement. Ming failed to just slap the movement in a case and contact it daily. The movements had been overhauled, up-to-date, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/