The term “Oyster” in the context of Rolex typically refers to the Oyster case, a pioneering design introduced by Rolex in 1926. The Rolex Oyster case revolutionized watchmaking by being the world’s first waterproof wristwatch. It features a screw-down crown and case back, creating a hermetically sealed environment that protects the watch movement from water and dust.

Over the years, the Rolex Oyster has become synonymous with durability, precision, and timeless elegance. The Oyster case remains a hallmark of Rolex watches, symbolizing the brand’s commitment to excellence and innovation in horology.