The first Royal Oak versions were fitted Using the calibre 2121 movement, which was based on the calibre 2120 created by Audemars Piguet in 1967, the earth’s thinnest self-winding motion in the era with date sign, and an General height of three.05mm. The calibre 2121 was also Geared up which https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/