The primary Royal Oak designs were fitted Using the calibre 2121 motion, which was according to the calibre 2120 developed by Audemars Piguet in 1967, the world’s thinnest self-winding movement in the era with date indication, and an overall top of 3.05mm. The calibre 2121 was also equipped having a https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/