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Rolex's High Performance Perpetual Movement


In praise of the invisible

Hidden away in its waterproof case, the Perpetual movement remains invisible to the wearer of the watch. Only Rolex-certified watchmakers are able to access it with their special tools.

Yet, when it has the honour of being seen, this exquisite mechanism known the world over for its chronometric performance can truly be admired for what it is: a work of art, a magnificent miniature universe, a myriad of shapes, forms, volumes, colours and surfaces, some polished, some satin-finished, others circular-grained, always with loving care, and in keeping with watchmaking tradition.

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Rolex Bienne - The Movement


Precision, robustness, reliability

Rolex Daytona's Self-winding Movement


A history of precision

The green seal accompanying every Rolex watch is a symbol of its status as a Superlative Chronometer. This exclusive designation attests that it has successfully undergone a series of specific final controls by Rolex in its own laboratories according to its own criteria, in addition to the official COSC certification of its movement. This unique testing of the chronometric precision of the cased-up movement, as well as of the watch’s waterproofness, self-winding and power reserve, pushes back the boundaries of performance and makes Rolex the benchmark for excellence in mechanical watches. The green seal is coupled with a five-year guarantee which applies to all Rolex models.

Rolex Superlative Chronometer Seal


The guardian of time

In a mechanical watch, the oscillator is the guardian of time. Comprising a hairspring and a balance wheel, this regulating organ determines the precision of the watch by the regularity of its oscillations. Rolex deploys exceptional know-how and resources to master the design and production of this strategic couple.

After five years of research, Rolex created and patented the blue Parachrom hairspring. Crafted from a paramagnetic alloy, it is unaffected by magnetic fields and up to 10 times more resilient to shocks than traditional hairsprings. Historically, the unique blue colour of the hairspring has been a sign of prestige reserved for only the most accurate timepieces.

Rolex Parachrom Hairspring
Rolex Shock Absorber
pa • ra • flex
  1. An exclusive and highly efficient shock absorber developed and patented by Rolex in 2005.
  2. Improves the shock resistance of Rolex watches by up to 50 per cent.
  3. The innovative geometry of the spring, designed by dynamic 3D modelling, ensures that it remains firmly positioned and with no risk of deformation.
  4. Validated through extensive shock testing and laboratory measurements.
  5. A tiny component making a huge difference.
  6. The Rolex Way.


The key to time

Have you ever wondered why a mechanical watch goes “tick-tock”? The ticking is produced by the escapement, a strategic part that plays a key role in the movement’s measurement of time.  “Tick”: a tooth of the escape wheel locks against one of the pallets of the lever. Then, released by the sweep of the oscillator, the pallet fork lets the wheel “escape”, until it locks against the second pallet: “tock”.

The pallet fork continues its infinite pendular beat against the oblique teeth of the escape wheel precisely 28,800 times every hour – 14,400 “ticks” and 14,400 “tocks”. That's 250 million times a year. We are at the very heart of the Rolex Perpetual movement, where its pace is distilled with chronometric precision.

Rolex Escapement


Did you know?

"Superlative chronometer officially certified"

Historically, a watch could be designated as a chronometer by its own manufacturer to attest of its high precision, a process which obviously carried a risk of fraudulent abuse. To guarantee the quality of its chronometers, Rolex made the choice to have them officially certified, in spite of the costs and extra time required. To mark this difference, in the late 1930s, the brand changed the inscription on its dials from “Chronometer” to “Officially Certified Chronometer”. In 1951, official certification became obligatory. Rolex decided to differentiate itself by obtaining certificates avec mention (certificates of superior performance). According to the old rules, movements whose precision proved superior in the tests received a certificate with the citation “particularly good results”. By the late 1950's, Rolex launched a new generation of movements which were up to three times more precise than the criteria for obtaining a mention.

To describe these exceptional qualities, Rolex invented the notion “Superlative Chronometer”. This designation would thereafter be added to the inscription on the dials used until then to constitute the well-known “Superlative Chronometer Officially Certified”. The chronometer certificates avec mention disappeared in 1973. But the inscription formulated by Rolex remains as a reminder of the quest for excellence and the pioneering role of the brand in the field of chronometric precision.

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Rolex Superlative Chronometer