Introduction
This manual provides detailed instructions for the proper use and care of your Seiko Men's Analog Quartz Watch, Model SSB345P1. Please read this manual thoroughly to ensure optimal performance and longevity of your timepiece. This watch features a quartz movement, chronograph functions, and is water-resistant.
Setup
1. Setting the Time
- Pull the crown out to the second click position.
- Turn the crown to set the hour and minute hands. Ensure the AM/PM is correctly set if your watch has a 24-hour indicator.
- Push the crown back into the normal position.
2. Setting the Date
- Pull the crown out to the first click position.
- Turn the crown to set the date. Avoid setting the date between 9:00 PM and 1:00 AM, as this may interfere with the automatic date change mechanism.
- Push the crown back into the normal position.
3. Adjusting the Bracelet
The stainless steel bracelet may require adjustment for a comfortable fit. It is recommended to have this adjustment performed by a qualified jeweler or watch technician to prevent damage. If you have the necessary tools and experience, you can remove or add links using a pin removal tool.

Image: The Seiko SSB345P1 watch with its stainless steel bracelet, worn on a wrist.
Operating the Chronograph
Your Seiko SSB345P1 watch is equipped with a chronograph function for measuring elapsed time.

Image: A detailed close-up of the watch face, showing the chronograph subdials and tachymeter bezel.
1. Standard Measurement
- Press button A (top pusher) to start the chronograph.
- Press button A again to stop the chronograph.
- Press button B (bottom pusher) to reset the chronograph to zero.
2. Split Time Measurement
- Press button A to start the chronograph.
- Press button B to measure a split time. The chronograph hands will stop, allowing you to read the elapsed time, while the internal timing continues.
- Press button B again to display the ongoing elapsed time.
- Press button A to stop the chronograph.
- Press button B to reset the chronograph to zero.
3. Using the Tachymeter
The tachymeter scale on the bezel can be used to measure speed over a known distance (e.g., 1 kilometer or 1 mile). Start the chronograph when you begin the measured distance and stop it when you complete the distance. The number on the tachymeter scale indicated by the chronograph second hand will be the average speed per hour.
Maintenance
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. Avoid using harsh chemicals or abrasive materials.
2. Water Resistance
This watch is water-resistant to 30 meters (3 ATM). This means it is suitable for everyday use and can withstand splashes or brief immersion in water. It is not suitable for swimming, showering, or diving. Ensure the crown is fully pushed in before any contact with water.
3. Battery Replacement
The watch is powered by a lithium-metal battery. When the battery runs low, the second hand may start moving in two-second intervals. It is recommended to have the battery replaced by an authorized Seiko service center or a professional watchmaker to ensure proper sealing and function.
4. Storage
When not wearing your watch, store it in a 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.

Image: The back casing of the Seiko SSB345P1 watch, showing model and water resistance markings.
Troubleshooting
- Watch not running: Check if the crown is fully pushed in. If the watch still does not run, the battery may need replacement.
- Incorrect time/date: Refer to the "Setting the Time" and "Setting the Date" sections to re-adjust.
- Chronograph hands not resetting to zero: If the chronograph hands do not return to the 12 o'clock position when reset, they may need calibration. Consult your watch's specific movement guide or a professional service center for adjustment procedures.
- Condensation inside the watch: This may indicate a loss of water resistance. Have the watch inspected by a professional immediately to prevent further damage.
Specifications
| Feature | Specification |
|---|---|
| Model Number | SSB345P1 |
| Movement Type | Quartz |
| Display Format | Chronograph |
| Case Material | Stainless Steel |
| Case Diameter | 45 mm |
| Case Thickness | 12 mm |
| Band Material | Stainless Steel |
| Band Width | 20 mm |
| Band Length | 230 mm |
| Crystal Type | Hardlex |
| Water Resistance | 30 Meters (3 ATM) |
| Special Features | Chronograph, Luminous hands, Tachymeter |
| Power Source | Battery (1 Lithium-metal) |
Warranty and Support
Your Seiko watch is covered by a manufacturer's warranty. Please refer to the warranty card included with your purchase for specific terms and conditions, including coverage duration and service procedures. For technical support, repairs, or any inquiries not covered in this manual, please contact Seiko customer service or visit an authorized Seiko service center.
You can find more information and contact details on the official Seiko website: www.seikowatches.com







