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

Devoted to fashion, GUANQIN brand has designed a variety of wristwatches to match your every style. Whether you are into retro, classic, luxury, casual or just like wearing special designed watches. GUANQIN has got the point in something for you. ADVANCED QUALITY: Advanced manufacturing technology, analog display, using high-precision Japanese automatic self-winding mechanical movement, accurate, stable and durable. High hardness synthetic sapphire crystal glass mirror, don't afraid of dill and smash, with the quality of high temperature resistance and super anti-corrosion. Tungsten steel case, multifunctional dial and tungsten steel band, super stand wear and tear, lines curves of watch perfectly fit the wrist, comfortable to wear. Safety double-open butterfly buckle. The IP plating of this watch is different from other inferior plating, it is expensive with a luxurious appearance, which will never fade away or comes off. Cool design. The watch is with calendar, tell your day and date anytime, anywhere. Moreover it's with week and luminous function. It is absolutely a practical high product watch, can certainly bring convenience to your life. The back cover is openworked design, showing the precise internal structure of the mechanical watch, and perfectly showing the complexity and artistic sense of machining movements. Gears, balance wheels, hairsprings, each tiny part cooperates with each other to give the watch vitality. Case thickness: 11mm Case diameter: men 41mm, women 26mm Band width: men 20mm, women 16mm Band length: men 240mm, women 200mm NOTE: The watch is 50M waterproof for daily use. But should not be used in bathing, sauna and other multi-water or high warm environments. Preventing the waterproof rubber ring from being inflated or contracted by the temperature will cause voids and accelerate aging, which will affect the waterproof function. Please avoid getting the watch close to the magnetic field (such as magnets, mobile phones, refrigerators, computers, etc.), because the magnetic field may cause the watch to be inaccurate or temporarily stopped. HOW TO WIND Battery free. Automatic movement provides energy for the watch. It supports automatically winding and manually winding. When using for the first time, please manually wind up the watch to get enough energy to keep it working well, rotating the crown about 30-40 laps can get enough energy for the watch. If you wear the watch less than 8-10 hours a day, please manually wind up your watch to keep working well.