The primary Royal Oak models were being fitted With all the calibre 2121 motion, which was according to the calibre 2120 developed by Audemars Piguet in 1967, the earth’s thinnest self-winding movement in the era with date indication, and an Over-all peak of three.05mm. The calibre 2121 was also Outfitted https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/