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