Calibre 2236 Is fitted that 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 almost any placement. In addition to his colleague Thomas Earnshaw, the pair would develop simplified and realistic marine chronometers. Each https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/