The initial Royal Oak versions were being fitted Using the calibre 2121 motion, which was depending on the calibre 2120 formulated by Audemars Piguet in 1967, the globe’s thinnest self-winding motion of your period with date indicator, and an Over-all peak of three.05mm. The calibre 2121 was also Geared up https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/