Swiss Brand GUANQIN Tourbillon Watches Classic Sapphire Waterproof Watches Men Automatic Mechanical Wind Up Wrist Watches (Black Dial Silver Bezel ) Brand: GUANQIN (1 year warranty and friendly customer service) Double-open butterfly buckle, classic style, making it easier to wear Cool design, two sub-dials are useful. With calendar, tell your date anytime and anywhere Equipped with stainless steel band, lines curves of watch perfectly fit the wrist, comfortable to wear Selection of high hardness sapphire crystal, with the quality of high temperature resistance and super anti-corrosion