H023 - Watch SEIKO - Free user manual and instructions
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| Product Type | Quartz dual-display watch |
| Caliber | H023 |
| Power source | 1 SEIKO SR1130W battery |
| Battery life | Approximately 2 years (may vary depending on usage) |
| Display | Analog (hands) and digital (liquid crystal) |
| Main functions | Time/Calendar, World Time (28 cities), Stopwatch (100 h, 1/1000 s), World Alarm |
| Automatic calendar | Until 2050 (includes leap years) |
| Daylight saving time display | Yes, per city |
| Time transfer function | Yes (replaces local time with selected city time) |
| Low battery indicator | Yes (scrolls in the window) |
| Hourly signal and confirmation sound | Can be turned on/off |
| Water resistance | See indication on case back (not specified in manual) |
| Operating temperature | -10 °C to +60 °C (optimal 5 °C to 35 °C) |
| Maintenance | Wipe with a soft cloth; avoid shocks, magnetic fields, chemicals |
| Periodic check | Every 2 to 3 years at an authorized SEIKO dealer |
| LCD panel lifespan | Approximately 7 years |
| Accuracy | Less than 15 seconds per month (at normal temperature) |
| Quartz frequency | 32,768 Hz |
| Safety | Keep battery away from children; do not short-circuit, heat, or dispose of in fire |
Frequently Asked Questions - H023 SEIKO
How to set the time and calendar on the SEIKO H023 watch?
In TIME/CALENDAR mode, press button B for 2 to 3 seconds to enter setting mode. Use button C to select the flashing item (city, hour, minute, etc.) and button D to adjust it. For seconds, press D to reset to 00. Set the digital time first, then align the analog hands using buttons A (counterclockwise) and D (clockwise).
How to replace the battery of the SEIKO H023 watch?
It is recommended to have the battery replaced by an authorized SEIKO dealer. The battery is a SEIKO SR1130W. After replacement, or in case of abnormal display, press and hold all four buttons simultaneously for 2 to 3 seconds to reset the integrated circuit, then set the time and calendar again.
How to use the stopwatch on the SEIKO H023?
Switch to CHRONO mode. Press C to start/stop, press D to record a lap time, and press D to reset. The stopwatch measures up to 100 hours in 1/1000 second increments. After use, stop the stopwatch to save battery.
How to set the alarm on the SEIKO H023 watch?
In ALARM mode, press B for 2 to 3 seconds. Use C to select the city, then the item to set (hour, minute) and D to adjust. To turn the alarm on/off, press C in ALARM mode. The alarm sounds for 20 seconds; press any button to stop it.
How to use the World Time function?
Switch to WORLD TIME mode. Press C to point the second hand to the desired city (on the bezel). The digital display shows the time in that city, while the hands indicate your local time. You can also enable daylight saving time for each city except Greenwich.
What to do if the watch displays an abnormal display?
Press and hold all four buttons A, B, C, and D simultaneously for 2 to 3 seconds. All digital indicators disappear then reappear as 'GREE', '1', 'MON' and 'AM 12:00 00'. Release the buttons, then set the analog and digital time again.
How to turn on/off the hourly signal and button sound?
In TIME/CALENDAR mode, press C each time to toggle the hourly signal and confirmation sound on/off. The hourly signal indicator is displayed when they are activated.
Is the SEIKO H023 watch waterproof?
The water resistance depends on the indication engraved on the case back. Refer to that indication. In general, avoid using the buttons underwater. If the watch comes into contact with seawater, rinse it with fresh water and dry it.
How to maintain my SEIKO H023 watch?
Wipe the case and bracelet regularly with a soft, dry cloth. Avoid exposure to strong magnetic fields, chemicals, severe shocks, and extreme temperatures. Have the watch checked every 2 to 3 years by an authorized SEIKO dealer.
What is the battery life and how to know when it is low?
The battery lasts about 2 years. When it is nearly exhausted, a low battery indicator scrolls in the window. Replace it as soon as possible, as the watch will stop within 2 to 3 days. Accuracy is not affected as long as the indicator does not appear.
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