The first Royal Oak styles ended up fitted While using the calibre 2121 movement, which was based on the calibre 2120 made by Audemars Piguet in 1967, the globe’s thinnest self-winding motion from the period with date sign, and an overall top of 3.05mm. The calibre 2121 was also Outfitted https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/