Calibre 2236 Is fitted using a Syloxi hairspring that is made by Rolex and patented. This silicon hairspring has a patented geometry that makes sure the calibre’s regularity in any posture. In conjunction with his colleague Thomas Earnshaw, the pair would develop simplified and sensible marine chronometers. Our estimates are https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/