The very first Royal Oak designs were fitted Together with the calibre 2121 motion, which was according to the calibre 2120 created by Audemars Piguet in 1967, the whole world’s thinnest self-winding movement with the era with day indicator, and an All round peak of three.05mm. The calibre 2121 was https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/