The first Royal Oak versions ended up fitted Along with the calibre 2121 movement, which was based on the calibre 2120 made by Audemars Piguet in 1967, the whole world’s thinnest self-winding movement of your period with day indicator, and an overall top of three.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/