The very first Royal Oak versions had been fitted with the calibre 2121 movement, which was based on the calibre 2120 formulated by Audemars Piguet in 1967, the globe’s thinnest self-winding motion of the era with day indicator, and an overall top of three.05mm. The calibre 2121 was also Outfitted https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/