The 1st Royal Oak products were fitted With all the calibre 2121 motion, which was dependant on the calibre 2120 produced by Audemars Piguet in 1967, the globe’s thinnest self-winding motion in the era with day indicator, and an Total top of three.05mm. The calibre 2121 was also Outfitted by https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/