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

Japanese automatic self-winding mechanical watch with 21 synthetic gemstone bearings, frequency 28800 times per hour, providing precise time and 42-hour power reserve. Powered by natural wrist movement; wear at least 8 hours daily. To wind, rotate crown clockwise 30-40 laps. Features calendar, day, date, week, and luminous function. See-through back cover to observe movement. Stainless steel case with glossy angled engraving, tungsten steel band, ergonomic design, and safety double-open butterfly buckle. Water resistant to 50M (164FT). High hardness synthetic sapphire crystal glass mirror with anti-reflective coating, hardness 9 on Mohs scale. Suitable for business, casual, sport, and other occasions. Great gift for Christmas, birthday, Father’s Day, Valentine’s Day. Package includes watch. Avoid extreme temperatures and magnets. Color may vary slightly from display.