The first Royal Oak versions had been fitted Along with the calibre 2121 motion, which was based on the calibre 2120 formulated by Audemars Piguet in 1967, the entire world’s thinnest self-winding movement in the period with date indicator, and an Over-all peak of 3.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/