Rz Guanqin Men Automatic Mechanical Watches 100m Waterproof Hollow Design Anti-corrosion and Scratch-resistant Sapphire Crystal Calendar Stainless Steel Case and Leather Strap 40mm Wrist Watches for Men (White with Brown) Water-resistant to 100m High hardness sapphire crystal, high temperature resistance and super anti-corrosion. Automatic Mechanical Movement Hollow engraving watch Case and bracelet are made of stainless steel