Rolex
Rolex SA () is a Swiss luxury watchmaker. Originally founded as "Wilsdorf and Davis" by Hans Wilsdorf and Alfred Davis in London in 1905, the company registered "Rolex" as the brand name of its watches in 1908. In 1919, the company moved its base of operations to Geneva, Switzerland in order to avoid heavy taxation from a recovering post-war Britain, and "Montres Rolex S.A." was registered as the new company name by Hans Wilsdorf in Geneva in 1920. Since 1960, the company has been owned by the Hans Wilsdorf Foundation, a private family trust.
Rolex Submariner
The next wave of Submariners, the 5512 (chronometer version) and 5513 (non-chronometer), marked a significant change in the appearance of the popular Rolex design. "Shoulders" were added to the crown side of the case to provide protection for the winding/setting mechanism. In early watches—until 1964 or so—these shoulders were pyramid-shaped and ended in points. Later watches were manufactured with rounded shoulders. The 5512 and 5513 were both fitted with the oversized crown, which thereafter became a standard feature of the Submariner line. In the early 1960s, Rolex discontinued the use of radium paint for the luminous indices, switching to safer tritium-infused paint.