Benchmark for precision

At the heart of the legendary precision of Rolex watches lies an inseparable couple: the hairspring and the balance wheel

In 1957, thanks to a major Rolex innovation in balance wheel design for adjusting the movement's rate, the brand made major headway in terms of chronometric precision, confirming its reputation as the maker of the best watches in the world. During the years, Rolex engineers perfected a revolutionary system for fine regulating of the inertia of the balance wheel – the Microstella screws – which led to a distinct improvement in the precision of the watch.