The 1st Royal Oak products were fitted With all the calibre 2121 movement, which was based upon the calibre 2120 formulated by Audemars Piguet in 1967, the earth’s thinnest self-winding movement of the period with day indication, and an In general peak of 3.05mm. The calibre 2121 was also equipped https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/