The Caliber 3255 launched by Rolex in 2015 marked an important milestone for the technical evolution of the Geneva house. The new movement, developed entirely by the Brand, brings with it 14 patents and numerous sinnovative technical solutions in both component design and manufacturing projects.

Almost all the components of the movement have been rethought and optimized to produce a movement twice as accurate of an officially certified chronometer and with one power reserve of approximately 70 hours ( 24 hours more than the previous generation of watches).

The movement has been optimized in every fundamental part. The engine organ has been equipped with a larger barrel without having to increase its volume, even reducing its thickness by half. But we come to the escapement, a component that has certainly benefited from an important innovation patented by Rolex and called Chronergy.

What is the escapement to anchor?

The escapement, composed of exhaust wheel and again, is thedistributor body of the movement positioned between the ruotismo and theorgan regulator. The exhaust wheel receives the spring energy contained in the barrel via the wheel train, and the distributes through the anchor pulses to the regulator (the barbell). In return, the escapement receives time scanning from the regulator and transmits it to the hands via the wheel train.


The new exhaust developed by Rolex can be considered an evolution of the escapement to still Swiss which, despite its confirmed reliability, has always shown a poor performance. In fact, it manages to return to the barbell only a third of the energy it receives from the spring present in the barrel and transmitted by the wheel train.

The escapement Chronergy Rolex allows you to improve the performance of this fundamental component by 15% without having to compromise with the reliability that has decreed its success. Let's see how. The solution developed by Rolex engineers involves theinversion of length ratios between the teeth of the escapement wheel and the levers of the anchor. The thickness of the latter is in fact reduced by fifty percent, while the contact surface of the teeth of the exhaust wheel has doubled.


These two components are no longer aligned as in the Swiss anchor escapement, with a greater distance between the anchor and the balance wheel to create a higher leverage effect.

The exhaust wheel is perforated to make it lighter, reducing its inertia. The anchor and exhaust wheel are made of nickel-phosphorus and this makes them insensitive to magnetic fields.


Throughout its history, Rolex has never accustomed us to revolutionary technical evolutions.

Despite this, it has always been distinguished by two important elements as well as supporters of its great success: the precision and the robustness of his movements. Any watchmaker who has ever worked on the calibers of the crowned house will be able to confirm this.

Working on the details, without completely distorting its trim or even creating a new escapement, Rolex managed to perfect a escapement (the one still Swiss) whose technical evolution has been stopped for fifty years now.

With the escapement CHRONERGY , together with the other technical and production evolutions developed by the Manufacture, Rolex has once again managed to improve itself and redefine the precision parameters. In fact, the term Superlative Chronometer now indicates an even smaller gap: -2 / + 2 seconds a day !