The primary Royal Oak versions ended up fitted Using the calibre 2121 movement, which was based upon the calibre 2120 designed by Audemars Piguet in 1967, the whole world’s thinnest self-winding movement with the period with day indication, and an All round top of 3.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/