The initial Royal Oak models had been equipped With all the calibre 2121 motion, which was based on the calibre 2120 produced by Audemars Piguet in 1967, the entire world’s thinnest self-winding motion on the era with day indication, and an overall top of three.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/