The Oyster soon boasted yet another outstanding feature. In 1931 Rolex introduced a self-winding mechanism with a Perpetual rotor, which allowed the watch to be wound by the movements of the wrist. This ingenious system is at the origin of every modern automatic watch. That technical development led to a radical cultural change and, before very long, the manually-wound watch would become outdated. The Oyster was expanding its horizons. For Replica Rolex, the world became a living laboratory. In oceans, on high mountain tops, or wherever extreme conditions prevailed around the world, they served to test the excellence of the watches in real-life conditions. As of the 1930s, the company issued Replica Rolex Oyster Perpetual watches to numerous Himalayan expeditions setting out to conquer Everest.
In the early 1950s, thanks to the perfect mastery of chronometric precision and waterproofness, Replica Rolex developed professional watches that served as tools and whose functions went far beyond simply telling the time. These watches were intended for new professional activities, such as deep-sea diving, aviation, mountain climbing and scientific exploration. Launched in 1953, the Submariner was the first watch guaranteed waterproof to a depth of 100 metres.
These watches generated lasting enthusiasm and became known as the watches of achievers. In 1953, equipped with an Oyster Perpetual, the expedition led by Sir John Hunt, Sir Edmund Hillary and Tenzing Norgay was the first to reach the summit of Everest. In 1960, Jacques Piccard’s bathyscaphe, Trieste, plunged to a depth of 10,916 metres, in the Mariana Trench in the Pacific Ocean. An experimental Oyster prototype, the Deep Sea Special, fastened to its hull, withstood a pressure of over one tonne per square centimetre.