The initial Royal Oak models had been equipped Using the calibre 2121 movement, which was according to the calibre 2120 formulated by Audemars Piguet in 1967, the world’s thinnest self-winding movement on the period with day indicator, and an In general top of 3.05mm. The calibre 2121 was also Geared https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/