The first Royal Oak models were fitted Along with the calibre 2121 movement, which was depending on the calibre 2120 made by Audemars Piguet in 1967, the entire world’s thinnest self-winding movement from the era with date sign, and an overall height of 3.05mm. The calibre 2121 was also Geared https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/