The 1st Royal Oak versions were being fitted With all the calibre 2121 movement, which was determined by the calibre 2120 designed by Audemars Piguet in 1967, the globe’s thinnest self-winding motion on the era with day indication, and an overall top of 3.05mm. The calibre 2121 was also equipped https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/