Calibre 3230 incorporates the patented Chronergy escapement, made from nickel-phosphorus, which combines higher Power effectiveness with great dependability and is additionally immune to robust magnetic fields. This movement is fitted Along with the blue Parachrom hairspring, produced by Rolex in a paramagnetic alloy. Movements: Caliber 3055 The 180XX sequence or https://rolex-and-watches74791.thekatyblog.com/29680410/the-smart-trick-of-rolex-datejust-41-that-no-one-is-discussing