The initial Royal Oak styles have been equipped Using the calibre 2121 movement, which was according to the calibre 2120 developed by Audemars Piguet in 1967, the globe’s thinnest self-winding movement from the era with date sign, and an All round top of three.05mm. The calibre 2121 was also Outfitted https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/