Calibre 2236 Is fitted with a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring incorporates a patented geometry that guarantees the calibre’s regularity in almost any situation. When Logan "enjoyed Mastering and writing about" MB&F's initial chronograph – his introduction article eloquently broke down the difficult https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/