The very first Royal Oak models have been equipped With all the calibre 2121 motion, which was dependant on the calibre 2120 developed by Audemars Piguet in 1967, the globe’s thinnest self-winding motion from the period with date indicator, and an overall top of 3.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/