The main Royal Oak types had been fitted with the calibre 2121 motion, which was based upon the calibre 2120 made by Audemars Piguet in 1967, the planet’s thinnest self-winding movement in the period with day indicator, and an Total peak of three.05mm. The calibre 2121 was also Outfitted that https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/