The 1st Royal Oak types have been fitted With all the calibre 2121 motion, which was dependant on the calibre 2120 produced by Audemars Piguet in 1967, the planet’s thinnest self-winding motion of the period with date sign, and an overall height of three.05mm. The calibre 2121 was also equipped https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/