The 1st Royal Oak products were being fitted Using the calibre 2121 motion, which was based upon the calibre 2120 created by Audemars Piguet in 1967, the world’s thinnest self-winding motion on the era with date sign, and an General height of three.05mm. The calibre 2121 was also equipped using https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/