The first Royal Oak styles had been equipped With all the calibre 2121 motion, which was dependant on the calibre 2120 formulated by Audemars Piguet in 1967, the earth’s thinnest self-winding movement on the era with date indicator, and an Over-all height of 3.05mm. The calibre 2121 was also equipped https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/