The very first Royal Oak models had been equipped Along with the calibre 2121 motion, which was based on the calibre 2120 designed by Audemars Piguet in 1967, the entire world’s thinnest self-winding motion in the period with day indicator, and an All round top of 3.05mm. The calibre 2121 https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/