Oyster is the designation for the best known sports and luxury watch series from Rolex. The first Rolex "Oyster" was presented in 1926, as the world's first patented waterproof watch. Since then, nearly every model of Rolex watch has been called an "Oyster", since most feature various waterproofing features. Cases of this series are milled out of solid stainless steel. All models have a screwed-down caseback and a screw-in crown.
- See Also: Bracelet#Oyster