The main Royal Oak versions were fitted Using the calibre 2121 motion, which was depending on the calibre 2120 produced by Audemars Piguet in 1967, the entire world’s thinnest self-winding motion of your era with date indicator, and an overall height of 3.05mm. The calibre 2121 was also Geared up https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/