Introduction
This manual provides instructions for the proper setup, operation, and maintenance of your GUESS Men's Analog Dress Watch, Model U0668G5. Please read these instructions carefully to ensure optimal performance and longevity of your timepiece.

Image: Front view of the GUESS Men's Analog Dress Watch U0668G5, showcasing the black chronograph dial with Roman numerals and stainless steel black ionic plated bracelet.
1. Setup
1.1 Setting the Time and Date
- Pull out the crown: Gently pull the crown (A) located on the right side of the watch case to position 2.
- Set the time: Rotate the crown (A) clockwise or counter-clockwise to set the hour and minute hands to the desired time.
- Set the date: Pull the crown (A) out to position 1. Rotate the crown to adjust the date. If your watch has a quick-set date function, you can adjust the date independently without changing the time. Avoid setting the date between 9 PM and 3 AM, as this may interfere with the date change mechanism.
- Push in the crown: Once the time and date are set, push the crown (A) back into position 0 to start the watch and ensure water resistance.

Image: Side view of the watch, highlighting the crown (A) and chronograph pushers (B and C) for time and function adjustments.
1.2 Adjusting the Bracelet
The stainless steel bracelet is designed for a secure and comfortable fit. If the bracelet is too loose or too tight, it may require adjustment. This typically involves removing or adding links. For precise adjustment, it is recommended to visit an authorized GUESS watch service center or a professional jeweler.

Image: Close-up view of the fold-over clasp with double push-button closure on the stainless steel black ionic plated bracelet.
1.3 Battery
Your watch is powered by a product-specific battery, which is included and pre-installed. The watch uses a Quartz movement. When the battery requires replacement, it is recommended to have it replaced by an authorized service center to maintain the watch's water resistance and warranty.
2. Operating the Watch
2.1 Chronograph Function
This watch features a chronograph stopwatch function. The chronograph measures elapsed time independently of the main time display.
- Start: Press the upper pusher (B) to start the chronograph. The chronograph second hand will begin to move.
- Stop: Press the upper pusher (B) again to stop the chronograph. The elapsed time will be indicated by the chronograph hands.
- Reset: After stopping the chronograph, press the lower pusher (C) to reset all chronograph hands to their zero positions.
2.2 Date Display
The watch features a date window on the dial, typically located at the 3 o'clock position. The date automatically advances once every 24 hours. Refer to section 1.1 for manual date adjustment.
2.3 Water Resistance Guidelines
Your GUESS U0668G5 watch is water resistant to 50 meters (165 feet). This rating means the watch is suitable for short periods of recreational swimming. It is not suitable for diving, snorkeling, or high-impact water sports. Always ensure the crown is fully pushed in before any contact with water. Do not operate the crown or pushers while the watch is wet or submerged.
3. Maintenance
3.1 Cleaning
To maintain the appearance of your watch, wipe the case and bracelet regularly with a soft, dry cloth. For stainless steel, a slightly damp cloth can be used, followed by a dry cloth. Avoid using chemical cleaners, as they may damage the watch's finish or seals.
3.2 Battery Replacement
When the battery needs replacement, it is strongly recommended to have it done by an authorized GUESS service center. This ensures that the correct battery type is used and that the watch's water resistance is properly resealed and tested.
3.3 Water Resistance Checks
Over time, the gaskets that ensure water resistance can degrade. It is advisable to have your watch's water resistance checked annually by an authorized service center, especially if it is frequently exposed to water.
4. Troubleshooting
4.1 Watch Not Running
- Check if the crown is fully pushed in (position 0).
- The battery may need replacement. Contact an authorized service center.
4.2 Incorrect Time or Date
- Refer to section 1.1 for instructions on setting the time and date.
- Ensure the crown is fully pushed in after setting.
5. Specifications
| Feature | Detail |
|---|---|
| Model Number | U0668G5 |
| Case Material | Stainless Steel |
| Case Diameter | 44.5 Millimeters |
| Case Thickness | 12 Millimeters |
| Band Material | Stainless Steel |
| Band Color | Black |
| Dial Color | Black |
| Crystal Type | Mineral |
| Movement Type | Quartz |
| Water Resistance Depth | 50 Meters (165 Feet) |
| Clasp Type | Fold-Over Clasp with Double Push-Button Closure |
| Features | Chronograph, Date Window |
6. Warranty Information
Your GUESS watch is covered by a manufacturer's warranty. Please refer to the warranty card included with your purchase for specific terms, conditions, and duration of coverage. The warranty typically covers manufacturing defects under normal use. Damage resulting from improper handling, accidents, or unauthorized repairs is generally not covered.
7. Customer Support
For any questions, service, or repair needs not covered in this manual, please contact GUESS customer support or an authorized GUESS watch service center. Contact information can usually be found on the official GUESS website or on the warranty card.
7.1 Watch Sizing Guide
For assistance with understanding watch sizing and how different case sizes appear on the wrist, please refer to the following video:
Video: A visual guide demonstrating various watch case sizes on different wrist dimensions to help determine the ideal fit.


