The primary Royal Oak versions were fitted Together with the calibre 2121 motion, which was based upon the calibre 2120 made by Audemars Piguet in 1967, the world’s thinnest self-winding movement of the era with date sign, and an overall top of three.05mm. The calibre 2121 was also Geared up https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/