The first Royal Oak styles ended up equipped With all the calibre 2121 movement, 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 indicator, and an overall peak of 3.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/