1. Introduction
Welcome to your new Casio MTD125D-2A1V Analog Quartz Watch. This manual provides essential information for proper setup, operation, and maintenance to ensure optimal performance and longevity of your timepiece.
This watch features a durable stainless steel case and band, a clear mineral glass dial window, and a reliable quartz movement. It is designed for everyday wear with a day-date calendar display and water resistance up to 100 meters.

A clear image of the Casio MTD125D-2A1V analog quartz watch, showcasing its stainless steel case, blue dial, and stainless steel bracelet.
2. Package Contents
- Casio MTD125D-2A1V Analog Quartz Watch
- Instruction Manual (this document)
3. Setup
3.1 Setting the Time
- Pull the crown out to the second click position.
- Turn the crown to set the hour and minute hands. Advance the minute hand four or five minutes past the desired time, then turn it back to the correct time.
- Push the crown back in to the normal position.
3.2 Setting the Date and Day
- Pull the crown out to the first click position.
- Turn the crown clockwise to set the day.
- Turn the crown counter-clockwise to set the date.
- Avoid setting the date and day between 9:00 PM and 4:00 AM, as this may interfere with the automatic date change mechanism.
- Push the crown back in to the normal position.
3.3 Adjusting the Bracelet
The stainless steel bracelet can be adjusted to fit your wrist. This typically involves removing or adding links. Due to the precision required, it is recommended to have this adjustment performed by a qualified jeweler or watch technician to prevent damage to the bracelet or clasp.
4. Operating
4.1 Timekeeping
The watch operates on a precise quartz movement, providing accurate analog time display with hour, minute, and second hands.
4.2 Day and Date Display
The watch automatically updates the day of the week and the date. Manual adjustments may be required at the end of months with fewer than 31 days.
4.3 Water Resistance
This watch is water resistant up to 100 meters (10 ATM). This means it is suitable for swimming, snorkeling, and showering. Do not operate the crown or pushers while the watch is wet or submerged to maintain water resistance. This watch is not suitable for diving.
5. Maintenance
5.1 Cleaning
Wipe the watch case and bracelet regularly with a soft, dry cloth to remove dirt and moisture. For stainless steel, a slightly damp cloth can be used, followed by a dry cloth.
5.2 Battery Replacement
The watch is powered by one Lithium Ion battery (included). The battery life typically ranges from 2 to 3 years. When the watch stops or the second hand moves erratically, the battery may need replacement. It is recommended to have the battery replaced by a qualified watch technician to ensure proper sealing and maintain water resistance.
5.3 Avoid Extreme Conditions
Protect your watch from extreme temperatures, strong magnetic fields, and harsh chemicals.
6. Troubleshooting
6.1 Watch Not Running
- Check if the crown is pushed in completely.
- The battery may be depleted. Refer to the "Battery Replacement" section.
6.2 Incorrect Time/Date
- Refer to the "Setting the Time" and "Setting the Date and Day" sections to reset.
- Ensure the crown is fully pushed in after adjustment.
6.3 Condensation Inside Dial
- This may indicate a loss of water resistance. Have the watch inspected by a professional immediately.
7. Specifications
- Model Number:
- MTD125D-2A1V
- Movement:
- Quartz
- Display Type:
- Analog
- Case Material:
- Stainless Steel
- Case Diameter:
- 45.6 millimeters
- Case Thickness:
- 10.4 millimeters
- Band Material:
- Stainless Steel
- Band Size:
- Men's Standard
- Band Width:
- 22 millimeters
- Dial Window Material:
- Mineral Glass
- Dial Color:
- Blue
- Bezel Material:
- Stainless Steel
- Calendar:
- Day-Date
- Water Resistance:
- 100 Meters (10 ATM)
- Battery:
- 1 Lithium Ion battery (included)
- Product Dimensions:
- 1.97 x 1.18 x 1.97 inches
- Item Weight:
- 1.38 ounces
8. Warranty and Support
For warranty information regarding your Casio MTD125D-2A1V watch, please refer to the official Casio warranty documentation or visit the Casio support website.
Click here for product warranty information.
For further assistance or service, contact Casio customer support or an authorized Casio service center.







