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

Equipped with a Japanese automatic self-winding movement featuring 24 synthetic gemstone bearings, this watch ensures accurate timekeeping and a long kinetic energy reserve. The self-winding mechanism harnesses wrist motion to power the mainspring, eliminating the need for batteries. Key features include a calendar display with day and date, luminous hands and markers for visibility in low light, and a see-through case back that reveals the movement in action. The watch is crafted with a tungsten steel case and band, offering exceptional scratch resistance and durability. The high-hardness synthetic sapphire crystal glass (9 on the Mohs scale, second only to diamond) is treated with an anti-reflective coating for clarity. It is water resistant to 50 meters (164 feet), suitable for rain and hand washing but not for swimming or diving. The ergonomic design and skin-friendly safety double-open butterfly buckle ensure comfort and ease of use. Ideal for business, casual, sport, and formal occasions, this watch makes a great gift for Christmas, birthdays, Father’s Day, and Valentine’s Day. Package includes the watch and original packaging. Note: Avoid extreme temperatures and magnetic fields to preserve the movement. Color: Gold and black. Gender: Male.