Introduction
This manual provides comprehensive instructions for the operation and maintenance of your Timex Expedition Metal Field 39mm Analog Watch, Model T40051. Please read these instructions carefully to ensure proper use and to maximize the lifespan of your timepiece.
Setup
How to Start Your Watch
If your watch is equipped with an e-guard (a small plastic insert between the case and the crown), it must be removed before the watch can begin operation. Gently pull the e-guard downward, perpendicular to the back of the watch case, to remove it.

Image: Side view of the watch, highlighting the crown. The e-guard, if present, would be located between the crown and the watch case.
Operating Instructions
Time-of-Day Setting
- Pull the CROWN out to the SET 2 Position. The second hand will stop moving.
- Rotate the CROWN clockwise to move the hour and minute hands until the correct time is displayed.
- Note: When setting the time, observe the AM or PM hands position, especially when passing the 12 o’clock to 1 o’clock mark. If the date changes, the time is currently in the AM. If no date change occurs, the time is in the PM.
- Push the CROWN back in to the ZERO Position. The second hand should resume operation after one second.
Date Setting (Quick Date Feature)
This feature is applicable to watch styles with the Quick Date function, such as the T40051 model.
- Pull the CROWN to the SET 1 Position.
- Rotate the CROWN in either direction until the current date is displayed. The date numeral will increase or decrease depending on the crown's rotation direction.
- Push the CROWN back in to the ZERO Position.
- Note: If date setting occurs between 10:00 PM and 2:00 AM, the date numeral adjustment should only be performed in the incremental direction to avoid incorrect date advancement.
INDIGLO® Night-Light Activation
The T40051 model features the INDIGLO® night-light for illumination in low-light conditions. The word “INDIGLO” is typically printed on the watch display area.

Image: Front view of the Timex Expedition watch face, showing the INDIGLO® branding.
- Push the CROWN inward. The watch display will illuminate with a blue-green or blue light.
- Releasing the CROWN back to the ZERO Position will turn off the INDIGLO® light.
- Note: Due to technical limitations, some products may exhibit a small unlighted area at the 6 o’clock or 12 o’clock location on the dial when INDIGLO® is activated. This is a normal characteristic and not a defect.
Maintenance
Water Resistance
Your Timex Expedition 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 or snorkeling. Avoid operating the crown or pushers while the watch is wet or submerged to prevent water intrusion.
Battery Information
The watch requires 1 Lithium Metal battery (included). When the battery needs replacement, it is recommended to have it replaced by a qualified watch technician to ensure proper sealing and maintain water resistance.

Image: Rear view of the watch case, indicating battery type and water resistance.
Cleaning and Care
- Clean your watch regularly with a soft, damp cloth.
- Avoid exposing the watch to extreme temperatures, direct sunlight for prolonged periods, or strong magnetic fields.
- The genuine leather strap may show signs of wear over time. Avoid prolonged exposure to water to preserve its quality.
Troubleshooting
- Watch Not Starting: Ensure any plastic e-guard has been completely removed from between the crown and the watch case. If the watch still does not start, the battery may need replacement.
- Date Not Changing Correctly: Verify that the time is set correctly for AM/PM. If the issue persists, ensure the date is not being adjusted between 10:00 PM and 2:00 AM, as this can interfere with the date change mechanism.
- INDIGLO® Light Not Working: Check if the crown is being pushed firmly inward. If the light still does not activate, the battery may be low. Remember that a small unlighted area on the dial is normal for some models.
Specifications
| Item Model Number | T40051 |
| Brand | Timex |
| Case Diameter | 39mm |
| Water Resistance | 50 meters (165 feet) |
| Case Material | Brass |
| Crystal Material | Mineral Glass |
| Strap Material | Genuine Leather |
| Battery Type | 1 Lithium Metal battery (included) |
Warranty and Support
For detailed warranty information and customer support, please refer to the official Timex website or contact Timex customer service directly. Keep your purchase receipt as proof of purchase for any warranty claims.
You can visit the official Timex store for more information: Timex Official Store





