The very first Royal Oak types have been equipped with the calibre 2121 movement, which was based upon the calibre 2120 designed by Audemars Piguet in 1967, the whole world’s thinnest self-winding motion with the period with date indicator, and an Total height of three.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/