The first Royal Oak versions were equipped Using the calibre 2121 motion, which was based on the calibre 2120 formulated by Audemars Piguet in 1967, the entire world’s thinnest self-winding motion of the era with day indicator, and an General peak of three.05mm. The calibre 2121 was also equipped which https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/