This trailblazing achievement marked the birth of the Testimonee concept and crystallized Hans Wilsdorf’s conviction that excellence should be proven in real-life conditions, by trial and over time.

Subsequently, the founder of Rolex supplied Oyster watches to numerous explorers, scientists, athletes, pilots, sailors, climbers and divers. From the highest peaks to the depths of the oceans, these men and women put Rolex watches to the test in the living laboratory of our world. Their feedback enabled the brand’s engineers to continually develop and improve the Oyster watches.