The first Royal Oak designs ended up fitted Using the calibre 2121 motion, which was dependant on the calibre 2120 produced by Audemars Piguet in 1967, the whole world’s thinnest self-winding motion with the period with day indicator, and an Over-all top of three.05mm. The calibre 2121 was also Outfitted https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/