Stainless-steel is certainly one of the most traditional of watchmaking materials for outer craftsmanship, and provides attractiveness, strength and affordability. It consists of the melting of your raw material utilizing oxyhydrogen flame as well as the crystallisation from the melted droplets to kind a cylinder. Graded 9 about the Mohs-hardness https://www.watchesworld.com/top-10-dive-watches/