The main Royal Oak models had been equipped While using the calibre 2121 movement, which was depending on the calibre 2120 made by Audemars Piguet in 1967, the world’s thinnest self-winding movement from the era with day indication, and an Over-all peak of three.05mm. The calibre 2121 was also Outfitted https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/