The very first Royal Oak versions ended up fitted With all the calibre 2121 movement, which was based on the calibre 2120 designed by Audemars Piguet in 1967, the world’s thinnest self-winding movement of your era with day indication, and an Over-all top of 3.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/