Alfred Davis and his brother-in-law Hans Wilsdorf founded Wilsdorf and Davis, the company that would eventually become Rolex SA, in London in 1905. Wilsdorf and Davis’s main commercial activity at the time involved importing Hermann Aegler’s Swiss movements to England and placing them in watch cases made by Dennison and others. These early wristwatches were sold to many jewellers, who then put their own names on the dial. The earliest watches from Wilsdorf and Davis were usually hallmarked “W&D” inside the caseback.
In 1908, Wilsdorf registered the trademark “Rolex”, which became the brand name of watches from Wilsdorf and Davis. He opened an office in La Chaux-de-Fonds, Switzerland. Wilsdorf wanted the brand name to be easily pronounceable in any language, and short enough to fit on the face of a watch. He also thought that the name “Rolex” was onomatopoeic, sounding like a watch being wound.
In 1931, Rolex patented a self-winding mechanism called a Perpetual rotor, a semi-circular plate that relies on gravity to move freely. In turn, the Oyster watch became known as the Oyster Perpetual.
Robert Dumas-Hermès (1898–1978), who succeeded Émile-Maurice after his death in 1951, closely collaborated with brother-in-law Jean-René Guerrand. Dumas became the first man not directly descended from Hermès père to lead the company because his connection to the family was only through marriage. Thus, he incorporated the Hermès name into his own, Dumas-Hermès.
Rolex SA offers products under the Rolex and Tudor brands. Montres Tudor SA has designed, manufactured and marketed Tudor watches since 6 March 1946. Rolex founder Hans Wilsdorf conceived Tudor to create a product for authorized Rolex dealers to sell that offered the reliability and dependability of a Rolex, but at a lower price. The number of Rolex watches was limited by the rate that they could produce in-house Rolex movements, thus Tudor watches were originally equipped with third-party standard movements supplied by ETA SA while using Rolex-quality cases and bracelets. Since 2015, Tudor has begun to manufacture watches with in-house movements. The first model introduced with an in-house movement was the Tudor North Flag. Following this, updated versions of the Tudor Pelagos and Tudor Heritage Black Bay have also been fitted with an in-house caliber.
While Rolex mostly produces mechanical watches, it also participated in development of the original quartz watch movements. Although Rolex has made very few quartz models for its Oyster line, the company’s engineers were instrumental in design and implementation of the technology during the late 1960s and early 1970s. In 1968, Rolex collaborated with a consortium of 16 Swiss watch manufacturers to develop the Beta 21 quartz movement used in their Rolex Quartz Date 5100 alongside other manufactures including the Omega Electroquartz watches. Within about five years of research, design and development, Rolex created the “clean-slate” 5035/5055 movement that would eventually power the Rolex Oysterquartz
