The 1st Royal Oak products were being equipped With all the calibre 2121 motion, which was based upon the calibre 2120 made by Audemars Piguet in 1967, the planet’s thinnest self-winding motion with the period with date sign, and an General top of 3.05mm. The calibre 2121 was also Geared https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/