Calibre 2236 Is equipped with a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring incorporates a patented geometry that makes sure the calibre’s regularity in any posture. British view firms of enough time ended up gradual to depart powering the their hand-crafting customs for mass output. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/