One of the very first models built to meet the demands of a true professional. For example, Sir John Hunt who ascended the Mount Everest in 1953. This was the first rugged expedition that this watch was issued for, but definitely not the only expedition. This watch has been on the wrist of numerous explorers. Therefore, it is no wonder that Rolex states that this watch has been designed to conquer the world Over the years, the Explorer I has been made in various executions and there is one thing that a lot definitely not all, like some early pieces have in common, the so-called 3-6-9 Explorer dial.