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