Calibre 2236 Is equipped by using a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring features a patented geometry that ensures the calibre’s regularity in any posture. Meanwhile, Graham has also ventured beyond their comfort and ease zone with some increased echelon parts. Their Orrery Tourbillon, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/