Precision without compromise

In 1910, in Switzerland, a Rolex became the first wristwatch to obtain official chronometer certification. And the key moments of this quest explain and justify each word of this famous aphorism, which took its definitive form around 1957.

Simply "Chronometer" at first, then "Officially Certified Chronometer", it finally became "Superlative Chronometer Officially Certified". The chronometer certificates avec mention disappeared in 1973 with the creation of the Swiss Official Chronometer Testing Institute (COSC). 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.