1. Introduction
Thank you for choosing the Casio MDV10D-1A2V analog watch. This manual provides essential information regarding the proper setup, operation, and maintenance of your new timepiece. Please read these instructions carefully to ensure optimal performance and longevity of your watch.
2. Product Overview
The Casio MDV10D-1A2V is a classic 3-hand analog watch featuring a durable stainless steel case and band, a black dial, and a date display. It is designed for everyday wear with a water resistance of 200 meters.

Image 2.1: Front view of the Casio MDV10D-1A2V watch, showcasing its stainless steel band and black dial.
3. Setup
3.1 Setting the Time
- Pull the crown out to the second click position. The second hand will stop.
- Rotate the crown to set the hour and minute hands. Ensure the AM/PM setting is correct by observing the date change. The date changes around midnight.
- Push the crown back in to the normal position. The second hand will resume movement.
3.2 Setting the Date
- Pull the crown out to the first click position.
- Rotate the crown to set the date. Do not set the date between 9:00 PM and 1:00 AM, as this may interfere with the date change mechanism.
- Push the crown back in to the normal position.
3.3 Adjusting the Stainless Steel Band
The stainless steel band may require adjustment to fit your wrist comfortably. This typically involves removing or adding links. For proper adjustment, it is recommended to visit a qualified jeweler or watch repair professional. Improper adjustment can damage the band or watch.
4. Operation
4.1 Timekeeping
Once the time and date are set, the watch will accurately display the current time with its three hands (hour, minute, second) and the current date in the date window.
4.2 Water Resistance
Your Casio MDV10D-1A2V watch is water resistant to 200 meters (20 BAR). This means it is suitable for everyday use, swimming, snorkeling, and skin diving. However, it is not suitable for scuba diving or high-impact water sports. Always ensure the crown is fully pushed in before exposing the watch to water.
- Do not operate the crown while the watch is wet or submerged.
- Avoid exposing the watch to hot water, steam, or sudden temperature changes, as this can compromise the water resistance seals.
- After exposure to saltwater, rinse the watch thoroughly with fresh water and dry it with a soft cloth.
5. Maintenance
5.1 Cleaning Your Watch
Regular cleaning helps maintain the appearance and function of your watch.
- Wipe the watch case and band with a soft, dry cloth to remove dirt and moisture.
- For stubborn dirt, especially on the stainless steel band, use a soft brush with mild soap and water, then rinse thoroughly with fresh water and dry completely.
- Avoid using chemical cleaners, solvents, or abrasive materials, as these can damage the watch's finish.
5.2 Battery Replacement
The watch is powered by an SR626 battery, which has an approximate life of 3 years. When the second hand begins to move at two-second intervals, it indicates that the battery is low and needs replacement. It is recommended to have the battery replaced by a qualified watch technician to ensure the water resistance seal is properly re-installed.
5.3 Storage
When not wearing your watch, store it in a cool, dry place away from direct sunlight, extreme temperatures, and strong magnetic fields. Keeping it in its original box or a watch case can protect it from dust and scratches.
6. Troubleshooting
6.1 Watch Not Running
- Check the crown: Ensure the crown is fully pushed in to the normal position.
- Battery: The battery may be depleted. Refer to Section 5.2 for battery replacement information.
6.2 Incorrect Time/Date
- Reset: Follow the instructions in Section 3.1 and 3.2 to reset the time and date.
- Impact: A strong impact may have affected the movement. If the issue persists after resetting, professional inspection may be required.
6.3 Condensation Inside the Watch
If condensation appears inside the watch crystal and does not clear within a short period, it indicates a potential issue with the water resistance. Avoid further exposure to water and seek immediate professional service to prevent damage to the movement.
7. Specifications
| Feature | Description |
|---|---|
| Model Number | MDV10D-1A2V |
| Movement | Quartz (Module 2784) |
| Accuracy | +/-20 seconds per month |
| Water Resistance | 200 Meters (20 BAR) |
| Case Material | Stainless Steel |
| Band Material | Stainless Steel |
| Crystal | Mineral Glass |
| Case Dimensions | 42 x 38.5 x 10.4 mm |
| Total Weight | 92g |
| Battery Type | SR626 |
| Battery Life | Approx. 3 years |
8. Warranty Information
Your Casio watch is covered by a manufacturer's warranty against defects in materials and workmanship. The specific terms and duration of the warranty may vary by region. Please refer to the warranty card included with your purchase or visit the official Casio website for detailed warranty information and registration.
9. Customer Support
For further assistance, technical support, or service inquiries, please contact Casio customer service. You can find contact information and frequently asked questions on the official Casio website:







