GUANQIN Women Men Couple Calendar Week Diamond Vintage Japanese Automatic Self-Winding Mechanical Wrist Watch Tungsten Steel Band Sapphire Crystal Waterproof Luminous Clock

This GUANQIN automatic mechanical wristwatch features a Japanese self-winding movement with 21 synthetic gemstone bearings, operating at 28,800 vibrations per hour for precise timekeeping and a 42-hour power reserve. The watch is powered by natural wrist movement and requires at least 8 hours of daily wear; if not worn for extended periods, it may stop and need rewinding by turning the crown clockwise 30-40 times. Key features include a calendar with day and date display, luminous hands and markers for visibility in low light, and a see-through case back to view the movement. The stainless steel case is crafted with glossy angled engraving for durability, while the tungsten steel band with an ergonomic design ensures comfort. A safety double-open butterfly buckle made of skin-friendly material allows easy fastening. The synthetic sapphire crystal mirror is highly scratch-resistant, second only to diamond in hardness, and resistant to high temperatures and corrosion. With 50 meters of water resistance, this watch is suitable for daily use such as hand washing and rain exposure, but not for swimming, diving, or hot baths. Avoid extreme temperatures and magnetic fields to protect the movement. This elegant and practical timepiece is ideal for business, casual, sport, and other occasions, making a great gift for Christmas, birthdays, Mother’s Day, and Valentine’s Day. Package includes the watch and original packaging. Color: silver black women. Gender: Female.