The 1st Royal Oak versions have been fitted Together with the calibre 2121 movement, which was according to the calibre 2120 created by Audemars Piguet in 1967, the world’s thinnest self-winding motion from the period with day sign, and an All round height of 3.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/