GUANQIN Men Calendar Week Multifunctional Vintage Wristwatch Analog Japan Automatic Mechanical Self-Wind Stylish Wrist Watch Steel or Leather Band Sapphire Waterproof Luminous Business Clock

Use Japan high-precision automatic self-wind movement, this watch guarantees accuracy and stability. The movement with 21 synthetic gemstones stable bearings, it provides precise timekeeping and long time kinetic energy reserve. Relying on the movement of the wrist to generate electricity, you wear it on your wrist, it will continue to wind automatically, because the rotor is connected to the manual parts, the rotor rotates with every movement of the wrist, transferring energy to the mainspring. The watch is with calendar, week, chronograph and luminous function. It is absolutely a practical high product watch. See-through back cover allows you to observe the work of the movement at any time, feel the passage of time intuitively, and enjoy a different visual experience. Elegant, fashionable and practical design suitable for business, sports, casual or any other occasions, which is a great gift choice to loved ones for Christmas, birthday, anniversary, Father's Day and Valentine's Day. Stainless steel case, through long hours of glossy angled engraving, planning, design, precision machining and production processes made it durable. With steel/leather band and ergonomic design, the watch is incredibly comfortable to wear. Whether you are working for long hours or engaging in outdoor activity, it fits snugly on your wrist, providing you with the utmost comfort. Double-open butterfly or pin buckle is made of durable and skin-friendly material, convenient to put on and take off. This watch is water resistant to 50M (164FT), with high hardness synthetic sapphire crystal glass mirror, precision workmanship and high quality parts, making it easy to handle even on rainy days and hand washing. The double-sided transparent synthetic sapphire watch mirror has a high hardness of 9 at the moth level, which is second only to diamond, and has high durability and is not easily scratched. An anti-reflective coating process is used to make the watch mirror smoother and clearer. We have strict quality control standards to ensure that every watch undergoes meticulous craftsmanship and rigorous testing. This watch possesses excellent durability, accompanying you for a long time. Do not use your watch at extremely hot or cold temperatures, which can damage your watch and shorten its lifespan. Keep your watch away from magnets as it can damage the movement. Please note that the display may be different and there may be color shifts.