ZhenPin Watch is a Damascus Steel watch case exclusive manufacturer in china. The Damascus steel (or Damaszener Stahl in German), is a material seldom encountered in wrist watches – and yet, not unsurprisingly, Damascus steel has traditionally been used in the making of swords, knives, and blades and is a forge-welded combination of at least two different types of steel, one softer and one harder – to create a new material that, theoretically, combines the favorable properties of both. The manufacturing process is rather complicated, as one would imagine, but what is actually relevant when it comes to the material's use in wristwatches is the fact that the steels are dissolved to varying extents by acid to form the typical light and dark nuances. The problem this creates is related to corrosion, and the material has to be treated so that it is resistant to the elements – presumably the "patina" of damascus steel is not as desirable as that of bronze. Sinn uses a so-called Tegiment Technology along with additional "Black Hard Coating," to provide protection against corrosion and also to better highlight the patterns of the steel. Even the #rolexwatch use Damascus steel for watches. It's really amazing outlooking. as a Damascus Steel watch case exclusive manufacturer in china, any customized model is free mold for making, welcome to inquiry anytime to sunnysun@jinhuashengwatch.com