The main Royal Oak products had been equipped with the calibre 2121 motion, which was according to the calibre 2120 made by Audemars Piguet in 1967, the entire world’s thinnest self-winding movement on the era with day sign, and an In general peak of 3.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/