Introduction
This manual provides detailed instructions for the Citizen Men's Eco-Drive Brycen Chronograph Watch, Model BL5558-58L. This timepiece combines advanced features with durable Super Titanium construction, offering a reliable and functional accessory for daily wear and sporting activities. Key features include Eco-Drive technology, a perpetual calendar, 1/20 second chronograph, tachymeter, 12/24 hour time display, and an alarm function.

Image: Front view of the Citizen Men's Eco-Drive Brycen Chronograph Watch with blue dial.
Key Features Overview
- Eco-Drive Technology: Powered by any light source, eliminating the need for battery replacement.
- Super Titanium™: Five times harder and 40% lighter than stainless steel, offering superior scratch resistance and hypoallergenic properties.
- Perpetual Calendar: Automatically adjusts for odd and even months, including leap years, until February 28, 2100.
- 1/20 Second Chronograph: Measures elapsed time up to 60 minutes.
- Tachymeter: Measures speed over a known distance.
- Dual Time (Second Time Zone): Displays time in a different time zone.
- Alarm: Programmable alarm function.
- Water Resistance: 100 meters (330 feet), suitable for swimming and snorkeling.

Image: Detailed view of the watch dial highlighting various functions.
Setup
1. Initial Charging (Eco-Drive)
Your Citizen Eco-Drive watch is powered by light. Before initial use, ensure the watch is fully charged by exposing it to bright light (natural or artificial) for several hours. A full charge can last for months, even in darkness.
Video: Overview of the Citizen Eco-Drive BL5558-58L watch, demonstrating its features and design.
2. Time and Date Setting
This watch features a Perpetual Calendar and often synchronizes with atomic time signals for accuracy. Initial setup can be complex due to its advanced features. For detailed, step-by-step instructions on setting the time, date, and synchronizing with atomic clocks, please refer to the official Citizen Watch website or dedicated online tutorials. Many users find video guides helpful for this process.
3. Bracelet Adjustment
The Super Titanium bracelet can be adjusted to fit your wrist. This typically involves removing or adding links. It is recommended to have this procedure performed by a professional jeweler to prevent damage to the bracelet or watch.

Image: The watch worn on a wrist, demonstrating its size and appearance.
Operating Instructions
1. Timekeeping (12/24 Hour)
The watch displays time in both 12-hour and 24-hour formats. The main hands indicate the current time, while a sub-dial typically shows the 24-hour format. Refer to the detailed manual for specific sub-dial readings and adjustments.
2. Chronograph Function
The 1/20 second chronograph measures elapsed time up to 60 minutes. Use the pushers on the side of the watch to start, stop, and reset the chronograph. Consult the full instruction manual for precise operation of the chronograph sub-dials.
3. Perpetual Calendar
Once correctly set, the perpetual calendar automatically adjusts the date, day, and month, accounting for leap years. No manual adjustment is required until the year 2100.
4. Dual Time (Second Time Zone)
The watch allows you to display a second time zone. This feature is useful for travelers or those who need to track time in different regions. Instructions for setting and switching between time zones are available in the comprehensive user guide.
5. Alarm Function
Set an alarm using the dedicated sub-dial and pushers. The alarm will sound at the programmed time. Refer to the full manual for detailed alarm setting procedures.
6. Tachymeter
The tachymeter scale on the bezel can be used in conjunction with the chronograph to measure speed. Start the chronograph at a known starting point (e.g., mile marker) and stop it at the end of the distance. The number on the tachymeter scale corresponding to the chronograph's second hand indicates the average speed in units per hour.
Maintenance
1. Eco-Drive Charging
To maintain optimal performance, ensure your watch is regularly exposed to light. Avoid prolonged storage in dark places. If the watch stops, expose it to bright light to restart and recharge. The watch has a power reserve indicator to show its charge level.
Video: An animated explanation of how Citizen's Eco-Drive technology works, converting light into energy to power the watch.
2. Cleaning
Wipe the watch case and bracelet with a soft, dry cloth regularly to remove dirt and oils. For water-resistant models, you can use a slightly damp cloth. Avoid using harsh chemicals or abrasive materials.
3. Water Resistance
The watch is water-resistant to 100 meters. This means it is suitable for showering, swimming, and snorkeling. However, it is not recommended for scuba diving. Always ensure the crown is pushed in completely before exposing the watch to water. Do not operate the pushers or crown while the watch is wet or submerged.
4. Super Titanium™ Care
Super Titanium™ is highly scratch-resistant and hypoallergenic. While durable, avoid unnecessary impacts or exposure to harsh environments to maintain its finish. Its lightweight nature and gentle feel on the skin make it comfortable for extended wear.
Video: An explanation of Citizen's Super Titanium technology, highlighting its durability, lightweight properties, and scratch resistance.

Image: Visual comparison demonstrating the lighter weight of Super Titanium compared to stainless steel.
Troubleshooting
Watch Not Running or Losing Charge
- Ensure the watch is adequately exposed to light for charging. A full charge can take several hours under bright light.
- Check the power reserve indicator (if available on your model) to assess the charge level.
- If the watch has been stored in darkness for an extended period, it may require a longer charging time.
Incorrect Time or Date
- Verify that the watch is correctly synchronized with the atomic time signal. This may require manual initiation of the synchronization process.
- Refer to the detailed setting instructions for your specific movement to manually adjust the time and date if necessary.
General Malfunctions
For any issues not covered here, or if troubleshooting steps do not resolve the problem, please contact Citizen customer support or visit an authorized service center. Do not attempt to open or repair the watch yourself, as this may void the warranty.
Specifications
| Feature | Detail |
|---|---|
| Model Number | BL5558-58L |
| Movement | Eco-Drive Quartz |
| Case Material | Super Titanium™ |
| Bracelet Material | Super Titanium™ |
| Dial Color | Blue |
| Crystal | Mineral Crystal |
| Water Resistance | 100 Meters (330 Feet) |
| Functions | 1/20 Second Chronograph, Perpetual Calendar, Dual Time, 12/24 Hour Time, Alarm, Date, Tachymeter |
| Case Dimensions | Approximately 1.42 x 1.38 x 0.59 inches |
| Weight | Approximately 3.8 ounces |
Warranty and Support
Your Citizen Eco-Drive Brycen Chronograph Watch comes with a 5-year limited warranty. For detailed information regarding warranty coverage, service, and support, please visit the official Citizen Watch website or contact their customer service department. Keep your proof of purchase for warranty claims.
Online Resources: For additional support, FAQs, and video tutorials, visit the Citizen Watch official website.

Image: The Citizen watch box, as it would appear upon purchase.





