Calibre 2236 Is fitted with a Syloxi hairspring that is produced by Rolex and patented. This silicon hairspring incorporates a patented geometry that ensures the calibre’s regularity in any position. Based in Henley-on-Thames, Bremont Watches have managed to put jointly an authentic take on pilot watches. Originally Established in 2002, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/