The 1st Royal Oak versions ended up fitted While using the calibre 2121 motion, which was depending on the calibre 2120 formulated by Audemars Piguet in 1967, the globe’s thinnest self-winding movement on the era with date indication, and an overall top of 3.05mm. The calibre 2121 was also Outfitted https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/