The 1st Royal Oak products had been equipped with the calibre 2121 movement, which was based on the calibre 2120 formulated by Audemars Piguet in 1967, the world’s thinnest self-winding motion of the era with day indicator, and an Total height of three.05mm. The calibre 2121 was also equipped that https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/