Featuring a unique hollow design, the Men's Watch Skeleton Automatic Quartz illuminates even the darkest of nights with its luminous light. Crafted with mineral strengthened glass, each watch mirror undergoes rigorous inspection to ensure quality. With a 30m life waterproof rating, this watch is suited for a business style and is powered by a Seagull brand quartz movement with origins from China. The 40mm dial is paired with a flat top tapered crown and a mineral tempered glass mirror, completed with a stainless steel jewelry buckle and strap. Choose from a variety of colors and materials including full gold steel, gold steel, silver steel, brown leather, or black leather in the 520 [double-sided hollow] model.