The main Royal Oak models have been fitted While using the calibre 2121 movement, which was based on the calibre 2120 designed by Audemars Piguet in 1967, the whole world’s thinnest self-winding motion from the era with date indicator, and an Over-all height of 3.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/