The main Royal Oak models have been fitted Using the calibre 2121 movement, which was depending on the calibre 2120 created by Audemars Piguet in 1967, the earth’s thinnest self-winding movement of the period with date indication, and an Over-all height of 3.05mm. The calibre 2121 was also Outfitted by https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/