The first Royal Oak designs ended up equipped With all the calibre 2121 movement, which was based upon the calibre 2120 formulated by Audemars Piguet in 1967, the whole world’s thinnest self-winding motion from the period with date sign, and an General height of three.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/