When checking the time on a Rolex, you may have noticed the words "Superlative Chronometer Officially Certified" written on the dial. Placed just above 6 o'clock, this cluster of words are not just there for decoration.
This easily-overlooked inscription is a badge of honor, one that promises the wearer that the watch on their wrist is tested for the highest levels of precision and craftsmanship.
This blog will break down the technical meaning of "Superlative Chronometer Officially Certified," and define what it means for new Rolex collectors.
Rolex Timekeeping Standards
In the simplest terms, "Superlative Chronometer Officially Certified” signifies that a Rolex watch has been tested to the highest timekeeping standards in the industry.
Rolex watches meet two different testing standards: one by the Official Swiss Chronometer Testing Institute (COSC), and in-house testing by Rolex themselves.
The COSC is an independent organization that certifies only a fraction of Swiss-made watch movements, around 6%, as having met some of the most strict chronometer testing standards in the industry.
Over a 15-day period, the watch's accuracy is tested in five position and against three temperatures, ensuring that its timekeeping remains precise and accurate.
This testing process is known to be expensive, but Rolex foots the bill to ensure their consumer gets the best watch possible.
Rolex +2/-2 Second Accuracy Standard
After passing the COSC's chronometer testing, a Rolex watch is then put through Rolex's own testing to meet even stricter requirements.
While the COSC requires that a watch meets a chronometer standard of accuracy within -4/+6 seconds per day, Rolex requires even better.
Their superlative chronometer testing guarantees an accuracy of -2/+2 seconds per day.
Furthermore, Rolex tests its watches to ensure that they are waterproof, self-wind efficiently, and hold their power reserve (anywhere from 48 to 72 hours, depending on the model of the watch).
Rolex Remains Technically Superior
In its most basic terms, "Superlative Chronometer Officially Certified" means that a Rolex watch has passed two levels of rigorous testing.
Collectors and watch enthusiast who are familiar with the meaning behind this inscription know that it is a mark of excellence, signifying Rolex's dedication to being the best in the business.
While some may wear Rolex watches only as fashion pieces or symbols of status, "Superlative Chronometer Officially Certified" sets Rolex apart as being ultra-reliable and technically superior.
It is a phrase that encapsulates why Rolex has reigned supreme, a tiny detail that speaks volumes about the accuracy and generational reliability of the timepiece on your wrist.
