The initial Royal Oak versions had been equipped Along with the calibre 2121 motion, which was according to the calibre 2120 developed by Audemars Piguet in 1967, the planet’s thinnest self-winding movement from the period with day indication, and an overall peak of 3.05mm. The calibre 2121 was also equipped https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/