The main Royal Oak styles ended up equipped With all the calibre 2121 motion, which was according to the calibre 2120 made by Audemars Piguet in 1967, the globe’s thinnest self-winding movement from the era with date sign, and an General top of 3.05mm. The calibre 2121 was also Outfitted https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/