The 1st Royal Oak products ended up fitted with the calibre 2121 movement, which was dependant on the calibre 2120 produced by Audemars Piguet in 1967, the whole world’s thinnest self-winding motion with the era with date sign, and an General peak of three.05mm. The calibre 2121 was also equipped https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/