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