Rolex SA is a Swiss watchmaking manufacturer of high-quality, luxury wristwatches. Rolex watches are popularly regarded as status symbols and BusinessWeek magazine ranks Rolex No.71 on its 2007 annual list of the 100 most valuable global brands. Rolex is also the largest single luxury watch brand, producing about 2,000 watches per day, with estimated revenues of around US$3 billionRolex is the official time keeper of Wimbledon and The Australian Open tennis grand slams. Jacques Piccard had a Rolex Sea Dweller Deep-Sea Special with him strapped to the outside of his submarine in 1960 during the Mariana Trench dive at a depth of 10,916 metres (35,814 ft).
Tenzing Norgay and other members of the Hillary expedition wore Rolex Oysters in 1953 at altitude 8,848 m on Mount Everest. Among the company's innovations are:
The first waterproof wristwatch "Oyster", 1923
The first wristwatch with an automatically changing date on the dial (Rolex Datejust ref.4467, 1945)
The first wristwatch with an automatically changing day and date on the dial (Rolex Day-Date)
The first wristwatch case waterproof to 100 m (330 ft) (Rolex Oyster Perpetual Submariner ref.6204, 1953)
The first wristwatch to show two time zones at once (Rolex GMT Master ref.6542, 1954)
The first watchmaker to earn chronometer certification for a wristwatch