The initial Royal Oak versions were being equipped Together with the calibre 2121 movement, which was determined by the calibre 2120 designed by Audemars Piguet in 1967, the world’s thinnest self-winding movement on the era with day sign, and an Over-all peak of three.05mm. The calibre 2121 was also Geared https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/