The first Royal Oak types ended up fitted Using the calibre 2121 movement, which was according to the calibre 2120 created by Audemars Piguet in 1967, the planet’s thinnest self-winding movement with the period with day indication, and an General peak of three.05mm. The calibre 2121 was also equipped using https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/