Stainless-steel is absolutely the most traditional of watchmaking materials for outer craftsmanship, and provides natural beauty, toughness and affordability. It involves the melting of your raw substance employing oxyhydrogen flame and also the crystallisation with the melted droplets to form a cylinder. Graded 9 to the Mohs-hardness scale (graded 1-ten), https://www.watchesworld.com/top-10-dive-watches/