Introduction
This manual provides essential instructions for the proper use and care of your Casio Men's AEQ100W-1AV 3D Dial Analog-Digital Display Quartz Watch. This versatile timepiece features a 10-year battery, 30-city world time, 3 daily alarms, a stopwatch, and a countdown timer. It is designed for durability and functionality, offering water resistance up to 100 meters (330 feet).

This image displays the front view of the Casio AEQ100W-1AV watch, highlighting its black resin case and strap, the analog hands, and the digital display with a world map graphic.
Setup
Initial Time and Date Setting
Your watch features both analog and digital time displays. Ensure both are synchronized for accurate timekeeping. Refer to the full manufacturer's manual for detailed instructions on setting the analog hands and digital time/date.
- Digital Time/Date: Typically adjusted using the 'MODE' button to navigate through settings and 'ADJUST' or 'SET' buttons to modify values.
- Analog Hands: Often synchronized with the digital time or set independently using a crown or specific button combinations.
World Time Configuration
The watch supports 30-city world time. To set your desired world time city:
- Enter World Time Mode using the 'MODE' button.
- Use the 'SET (+)' and 'SET (-)' buttons to scroll through the available city codes until your desired city is displayed.
- The digital display will show the current time in the selected city.
Operating Instructions
Your Casio AEQ100W-1AV watch offers multiple functions accessible via its buttons. The primary buttons are typically 'ADJUST', 'MODE', 'SET (+)', and 'SET (-)'.
Mode Navigation
Press the 'MODE' button repeatedly to cycle through the different operational modes:
- Timekeeping Mode (Analog and Digital Display)
- World Time Mode
- Tele Memo Mode
- Alarm Mode (AL1, AL2, SNZ)
- Stopwatch Mode
- Countdown Timer Mode
Stopwatch Function
The watch features a 1/100 second stopwatch with a 24-hour capacity.
- Enter Stopwatch Mode.
- Press the 'SET (+)' button to start/stop the stopwatch.
- Press the 'SET (-)' button to reset the stopwatch.
Countdown Timer Function
A 24-hour countdown timer is available.
- Enter Countdown Timer Mode.
- Use 'ADJUST' to set the countdown start time.
- Press 'SET (+)' to start/stop the timer.
- Press 'SET (-)' to reset the timer.
Alarm Settings
The watch includes 3 daily alarms (AL1, AL2) and a snooze alarm (SNZ).
- Enter Alarm Mode.
- Use 'SET (+)' or 'SET (-)' to select AL1, AL2, or SNZ.
- Press 'ADJUST' to enter the alarm setting mode and modify the alarm time.
- Press 'ADJUST' again to exit setting mode.
Tele Memo Function
Store up to 30 entries of telephone numbers or other data.
- Enter Tele Memo Mode.
- Use 'ADJUST' to enter data entry mode.
- Use 'SET (+)' and 'SET (-)' to select characters and 'MODE' to move to the next position.
- Press 'ADJUST' to save the entry.
Maintenance
Water Resistance
This watch is water-resistant to 100 meters (330 feet). This rating means it is suitable for swimming and snorkeling. It is not suitable for scuba diving or high-impact water sports.
- Do not operate buttons while the watch is wet or submerged.
- Avoid exposing the watch to hot water or steam, as this can compromise the seals.
Cleaning
To maintain the appearance and functionality of your watch:
- Wipe the watch case and band with a soft, dry cloth regularly.
- For resin bands, a mild soap solution and a soft brush can be used, followed by thorough rinsing and drying.
- Avoid using harsh chemicals or abrasive cleaners.
Battery Replacement
The watch is equipped with a 10-year battery. When the battery power is low or depleted, it is recommended to have it replaced by an authorized Casio service center or a qualified watch technician to ensure proper sealing and water resistance.

A graphic emblem signifying the watch's extended 10-year battery life.
Troubleshooting
If you encounter issues with your watch, consider the following general advice:
- Incorrect Time/Date: Re-check the time and date settings in Timekeeping Mode and World Time Mode. Ensure analog hands are synchronized with the digital display.
- Display Issues: If the digital display is blank or dim, the battery may be low. If the issue persists after battery replacement, contact support.
- Buttons Not Responding: Ensure the watch is not in a locked mode (if applicable) or that no foreign objects are obstructing the buttons.
For persistent problems or complex issues, refer to the comprehensive manufacturer's manual or contact Casio customer support for assistance.
Specifications
| Model Number | AEQ-100W-1AVCF |
| Case Diameter | 50.4mm |
| Water Resistance | 100 meters (330 feet) |
| Battery Life | Approx. 10 years (1 Lithium Metal battery included) |
| Movement | Quartz |
| Case/Band Material | Resin |
| Functions | World Time (30 cities), Tele Memo (30 entries), 1/100 Sec. Stopwatch (24Hr), Countdown Timer (24Hr), 3 Daily Alarms, 12/24 Hr. Formats |
| Module | 5479 |
Product Overview Video
This video provides a 360-degree view of the Casio AEQ100W-1AV watch, showcasing its design and features from various angles.
Warranty and Support
Warranty Information
For detailed warranty information, please refer to the warranty card included with your product or visit the official Casio website. Warranty terms and conditions may vary by region.
Customer Support
For further assistance, technical support, or service inquiries, please visit the official Casio website or contact their customer service department. You can often find FAQs, downloadable manuals, and contact information on their support pages.