The first Royal Oak models have been fitted with the calibre 2121 motion, which was dependant on the calibre 2120 formulated by Audemars Piguet in 1967, the globe’s thinnest self-winding motion of the period with date sign, and an Total peak of 3.05mm. The calibre 2121 was also Outfitted that https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/