Oyster perpetual refers to the design of an integrated case, screw-in bottom cover and screw-in handle invented by Rolex, that is, oyster, which means "oyster" in English. This structure of oyster is different from the welded ear, press-in bottom cover and plug-in handle at that time, and it also symbolizes that Rolex watches are as strong and waterproof as oysters. Simply put, the whole system is a steel cutting lathe, and the ear and case are integrated, which is much stronger than the popular welded ear at that time. The lock handle at the bottom, the back cover and the watch handle are all screwed, which is waterproof.
The eternal meaning of oysters:
Rolex's contribution to the wristwatch lies not only in the oyster sealed case, but more importantly, in 193 1 year, Rolex invented the patented technology of perpetual motion thallium, and every slight swing of the wrist can be converted into the power of the movement to keep the wristwatch running continuously. This system is the ancestor of all modern automatic mechanical watches, and the status of manual winding watches has been greatly reduced since then. In today's advanced watchmaking technology, self-winding movement has become one of the indispensable and important factors.