The 1st Royal Oak products had been equipped with the calibre 2121 motion, which was dependant on the calibre 2120 developed by Audemars Piguet in 1967, the earth’s thinnest self-winding movement in the period with date sign, and an overall top of three.05mm. The calibre 2121 was also Outfitted that https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/