The main Royal Oak styles had been equipped with the calibre 2121 movement, which was dependant on the calibre 2120 made by Audemars Piguet in 1967, the entire world’s thinnest self-winding movement of your period with day sign, and an All round top of three.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/