The main Royal Oak models had been fitted With all the calibre 2121 movement, which was dependant on the calibre 2120 developed by Audemars Piguet in 1967, the world’s thinnest self-winding motion on the era with date indication, and an All round peak of three.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/