The invention of oyster shells.
What is a diving watch like? Strictly speaking, before the invention of oyster shell, most diving watches needed a waterproof cover outside the case. For example, both Omega and Rolex have added a watch case outside to seal the head.
1926, Rolex invented and patented the oyster case. Compared with the previous waterproof mode, the redundant shell is removed. Locking the bezel, crown and bottom cover in the middle shell is a technology, which is very similar to the waterproof mode of oysters. Rolex named it oyster case, making exquisite luxury a practical diving tool, and asked Mercedes to cross the English Channel in Rolex. It is still in use today.
2) Technical characteristics of oyster shells
We can divide the case into several configurations, such as case, crown, mirror, bezel, helium gas exhaust valve and so on. The waterproof level is also different according to the configuration. According to the different waterproof degree of the case, the case will be slightly improved, and the overall design principle is the same.
3) An important part of oyster shell
A very important part of Rolex oyster case lies in the waterproof design of the crown, which determines the waterproof depth. The crown adopts double and triple waterproof systems, and the crown part is designed with rubber rings. This rubber ring is like a waterproof door of a submarine, which can effectively prevent seawater from entering the inner crown. The triple waterproof system is inexplicably added to the head, and the waterproof function is deeper.