The 1st Royal Oak styles ended up fitted Using the calibre 2121 movement, which was determined by the calibre 2120 made by Audemars Piguet in 1967, the world’s thinnest self-winding motion of the period with day indication, and an In general peak of 3.05mm. The calibre 2121 was also Outfitted https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/