The primary Royal Oak versions had been fitted While using the calibre 2121 motion, which was based on the calibre 2120 designed by Audemars Piguet in 1967, the whole world’s thinnest self-winding movement from the era with date sign, and an Over-all peak of three.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/