The initial Royal Oak versions had been fitted While using the calibre 2121 movement, which was determined by the calibre 2120 produced by Audemars Piguet in 1967, the entire world’s thinnest self-winding motion of the era with date sign, and an Over-all peak of three.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/