The first Royal Oak types were equipped Using the calibre 2121 motion, which was according to the calibre 2120 formulated by Audemars Piguet in 1967, the world’s thinnest self-winding movement on the period with date indication, and an In general peak of 3.05mm. The calibre 2121 was also Geared up https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/