Rolex doesn’t launch a new movement very often. But when it does, one had to be sure to sit up and take heed. At Baselworld 2015, we were awed by the new Calibre 3255, Rolex’s first new movement since 2012’s Calibre 9001, which drives the SkyDweller.
The Calibre 3255 represents a significant enhancement in precision, power reserve and resistance to magnetic fields and shocks. The key here is Rolex’s new Chronergy escapement. It’s essentially an improved Swiss lever escapement, with redesigned escape wheel teeth and a lighter escape wheel (which has a cut-out design to reduce its inertia) that makes the escapement 15 per cent more energy efficient.