1. Introduction
Thank you for choosing the OUPINKE G3186GH Automatic Mechanical Watch. This timepiece combines sophisticated design with precise mechanical engineering, featuring a self-winding movement, sapphire crystal, and a durable tungsten steel strap. This manual provides essential information for the proper setup, operation, and maintenance of your watch to ensure its longevity and performance.

The OUPINKE G3186GH automatic mechanical watch, showcasing its elegant design with a black dial and tungsten steel strap.
2. Setup
2.1 Initial Winding
Your OUPINKE automatic watch is powered by the motion of your wrist. If the watch has stopped or has not been worn for an extended period, it requires initial manual winding to build up a power reserve.
- Ensure the crown is in Position 0 (fully pushed in against the case).
- Turn the crown clockwise approximately 30-40 times. This will initiate the movement and provide sufficient power for the watch to start running.
- Once worn, normal wrist movements will continue to wind the watch.
2.2 Setting the Time
- Pull the crown out to Position 2 (the outermost position).
- Turn the crown clockwise or counter-clockwise to set the hour and minute hands to the correct time.
- Once the time is set, push the crown back into Position 0.
2.3 Setting the Date and Day
Your watch features a date and day display. To set these:
- Pull the crown out to Position 1 (the middle position).
- Turn the crown clockwise to adjust the date.
- Turn the crown counter-clockwise to adjust the day of the week.
- Important: Avoid setting the date and day between 9:00 PM and 3:00 AM, as this can interfere with the automatic date change mechanism and potentially damage the movement. If you need to set the date during this period, first adjust the time outside this window, set the date/day, and then reset the time.
- Once the date and day are set, push the crown back into Position 0.

Illustration of the crown positions for time and date/day adjustment.
2.4 Adjusting the Bracelet
The tungsten steel bracelet can be adjusted for a comfortable fit. It is recommended to have this adjustment performed by a professional watchmaker to prevent damage to the links or clasp.
3. Operating Your Watch
3.1 Automatic Mechanical Movement
The OUPINKE G3186GH features a Japanese automatic mechanical movement. This movement is self-winding, meaning it harnesses the kinetic energy from your wrist's natural motion to power the watch. When fully wound, the watch has a power reserve that allows it to run for approximately 45 hours without additional winding or movement. If the watch is not worn for an extended period, it will stop and require manual winding as described in Section 2.1.

The intricate automatic mechanical movement visible through the watch's case back.
3.2 Water Resistance (50 Meters / 5 ATM)
Your OUPINKE G3186GH watch is water-resistant up to 50 meters (5 ATM). This means it is suitable for daily use, such as splashes, rain, and brief immersion in water. It is not suitable for swimming, diving, or showering with hot water, as temperature changes and steam can compromise the seals. Always ensure the crown is fully pushed in before any contact with water.

The watch demonstrating its 50-meter water resistance.
3.3 Luminous Display
The hands and hour markers of your watch feature an HD luminous coating, allowing for readability in low-light conditions. The luminosity is activated by exposure to light.
Official OUPINKE video demonstrating the features and design of the G3186GH automatic mechanical watch, including its luminous display.
4. Maintenance
4.1 Cleaning
To maintain the appearance of your watch:
- Wipe the case and sapphire crystal with a soft, dry, lint-free cloth.
- For the tungsten steel bracelet, a slightly damp cloth can be used, followed by immediate drying. Avoid harsh chemicals or abrasive materials.
4.2 Storage
When not wearing your watch, store it in a cool, dry place away from direct sunlight, extreme temperatures, and strong magnetic fields. The original watch box is ideal for storage.
4.3 Regular Servicing
Like all mechanical timepieces, your OUPINKE watch benefits from periodic professional servicing (typically every 3-5 years) to ensure optimal performance and accuracy. This includes cleaning, lubrication, and inspection of the movement and seals.
5. Troubleshooting
- Watch Not Running or Losing Time: This is typically due to insufficient power reserve. Manually wind the watch (Section 2.1) and wear it regularly. Automatic watches require consistent wrist movement to stay wound.
- Date/Day Not Changing Correctly: Ensure the date and day were not set between 9:00 PM and 3:00 AM. If so, reset the time outside this window, adjust the date/day, and then set the correct time.
- Water Intrusion: If moisture appears inside the watch, immediately take it to a professional watchmaker for inspection and repair to prevent permanent damage.
6. Specifications
| Feature | Detail |
|---|---|
| Model Name | G3186GH |
| Movement Type | Japanese Automatic, Self-Winding |
| Display Type | Analog |
| Case Material | Stainless Steel |
| Band Material | Tungsten Steel |
| Crystal Material | Sapphire Crystal |
| Water Resistance | 50 Meters (5 ATM) |
| Clasp Type | Push Button Hidden Clasp |
| Case Diameter | 40 Millimeters |
| Case Thickness | 12 Millimeters |
| Band Width | 20 Millimeters |
| Band Length | 7.8 Inches |
| Face Style | Skeleton |
| Manufacturer | OUPINKE |
7. Warranty and Support
OUPINKE watches are crafted with attention to detail and quality. For specific warranty information regarding your OUPINKE G3186GH watch, please refer to the warranty card included with your purchase or contact OUPINKE customer support directly. Keep your proof of purchase for any warranty claims.
For further assistance or inquiries, please visit the official OUPINKE website or contact their customer service department.