The crown is fixed on the round tube with screws and becomes an integral part of the case. And this is the first waterproof watch created by Rolex in the history of watchmaking.
The screw-down winding crown and screw-down case back are the heart of the Oyster watch. This extraordinary waterproof design was patented in 1926, making Rolex watches internationally famous, marking the beginning of Rolex’s success story.
Connecting two worlds
The crown not only completely seals the case, but also operates the main functions of the watch. Depending on the movement model, the crown can be pulled out to two or three positions to adjust the time, date, day of the week or second time zone display. The first position allows manual winding of the watch as required.
Double and triple lock crowns
The double-lock mechanism, which was introduced in 1953, ensures that the screw-in crown is completely waterproof, thanks to the two sealed areas inside the round tube and crown. All Oyster models equipped with this device are water-resistant to 100 meters (330 feet). The two dots or a horizontal line under the Rolex logo on the winding crown indicate that the watch is equipped with this double-locking device. The triple-locking device, introduced in 1970, has a third sealing zone inside the crown tube, which is specially designed to enhance the waterproof depth of submersible, sea-dweller and RolexDeepsea diving watches, ensuring these three watches The waterproof depth is 300 meters (1,000 feet), 1,220 meters (4,000 feet) and 3,900 meters (12,800 feet). Today, other professional models also have this device. There are three dots below the Rolex logo on the winding crown, indicating that the watch is equipped with this three-lock mechanism.
Precise and rigorous production
The winding crown, consisting of almost ten components, is a small technical masterpiece. Just like the case and strap, this crown also uses the manufacturing knowledge and expertise of the outside of the watch, and has the same accuracy and quality. The winding crown is made of only the finest materials, the rubber ring is made of polymer, and the mechanical and aesthetic components are made of the highest quality stainless steel and precious metals. The raw materials are formed by extrusion or embossing. Before assembling different parts, they are subjected to multiple machining and polishing.