The 1st Royal Oak styles ended up equipped While using the calibre 2121 motion, which was according to the calibre 2120 formulated by Audemars Piguet in 1967, the whole world’s thinnest self-winding motion on the period with date indication, and an Total height of 3.05mm. The calibre 2121 was also https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/