The primary Royal Oak styles were fitted While using the calibre 2121 motion, which was based on the calibre 2120 formulated by Audemars Piguet in 1967, the whole world’s thinnest self-winding movement on the era with date indication, and an General top of 3.05mm. The calibre 2121 was also equipped https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/