Need help?Do you have a question about the Seiko 7B27 and is the answer not in the manual?
General| Movement Type | Quartz |
|---|---|
| Caliber Number | 7B27 |
| Case Material | Stainless steel |
| Water Resistance | 10 bar |
| Chronograph | Yes |
| Date Function | Yes |
| Accuracy | ±15 seconds per month |
| Functions | Chronograph |
Describes risks of severe injury from improper use. Includes stopping use immediately.
Describes risks of light injuries or material damage. Avoids specific environments.
Prohibits use in scuba diving or saturation diving due to lack of specialized testing.
Avoids direct faucet water, operating with wet hands, and steam exposure.
Displays local time in different time zones globally by selecting a time zone.
Automatically synchronizes time via radio signals from Japan, China, and USA.
Powers the watch using solar energy converted by a dial-mounted solar cell.
Suppresses energy consumption during extended periods without adequate light.
Corrects hand positions automatically if misaligned due to impact or magnetism.
Explains the operation of buttons A and B for various watch functions.
Details how to use the watch crown for time setting and other functions.
Explains reception level and result displays indicated by the second hand.
Instructions for pressing buttons A and B together effectively.
How to use a normal crown by pulling it out and operating it.
How to unlock and lock a screw-lock crown for operation and water resistance.
How to check the remaining energy level by observing the second hand movement.
How to ensure the time and date are correct, referencing radio signal reception.
Overview of the world time capabilities, displaying local time in 25 regions.
How to select different time zones, indicated by the second hand.
Detailed procedure for setting the time zone using buttons A and B.
Table showing time zones, representative cities, and UTC differences.
Explains the process of radio signal reception for time and date adjustment.
Describes how the watch receives signals automatically or manually.
Details the reception area for Japanese radio signals from transmitting stations.
Details the reception area for Chinese radio signals.
Details the reception area for US radio signals.
How to understand the display indicating reception success or failure.
Tips on placement and avoiding movement during reception.
Lists places where reception is difficult due to interference.
Advice on interference and transmission stops affecting signal reception.
Instructions on how to expose the watch dial to light for charging.
Table showing charging times under different light conditions.
Explains the second hand movement indicating low energy.
Details the two power save modes that conserve energy.
How to clean the watch and band to preserve quality.
Explains different levels of water resistance and their usage conditions.
Explains magnetic resistance levels and precautions for use.
Lists everyday items that emit magnetism and may affect the watch.
Instructions for metallic, leather, and polyurethane bands.
Information on allergies and irritation from bands.
Guidelines for adjusting band length for comfort and airflow.
Introduction to A, B, and C type special clasps.
Details on the battery and cautions for replacement.
Details on overcharge protection for the secondary battery.
Notes on where and how to charge the watch safely.
Explains how Lumibrite works and its luminous properties.
Details on warranty, repair, and available parts.
Advice on regular maintenance for optimal performance.
Steps to place the watch for manual reception.
Steps for reception completion and checking results.
Solutions for failed or no reception.
Detailed instructions for manual time setting.
Detailed instructions for manual date setting.
How the watch automatically corrects hand positions.
How to manually set date and hand positions.
Continued steps for setting the date's preliminary position.
Detailed steps for setting hour/minute hand preliminary positions.
Solutions for time gaining, losing, or hour shifts.
How to fix time errors after successful signal reception.
Solutions for date errors and unresponsive controls.
Guidance for when unsure during settings.
Procedure to reset the watch's internal system.
Covers basic features, frequency, and accuracy.
Includes temperature, power source, and operation duration.
Details radio reception and IC specifications.
Situations requiring immediate cessation of use.
Places to avoid wearing or storing the watch.
What to do if skin irritation or allergies occur.
Warning against using the watch for scuba diving.
Cautions regarding water, crown operation, and steam.
Describes the watch's ability to display world times and receive radio signals.
Explains solar charging and power save functions.
Details functions related to signal reception results and automatic hand correction.
Instructions for using buttons A, B, and the crown.
Explanation of reception level, result, and time zone displays on the dial.
How to press both buttons simultaneously.
Explanation of the two crown types.
How to check the battery charge.
How to ensure the time and date are correct.
How to display local times in different global zones.
Detailed procedure for choosing a time zone.
Explains time zones, UTC, and DST.
How radio signals synchronize the watch.
Explains how to perform automatic and manual reception.
Details the reception range for Japan's JJY signal.
How to read the second hand for reception status.
Tips on placement and avoiding movement during reception.
Lists places that interfere with radio signals.
Advice on interference, out-of-range usage, and transmission stops.
Instructions for charging the watch via light exposure.
Table showing charging times under different light conditions.
Explains the second hand movement indicating low energy.
Details the two power save modes that conserve energy.
Guidance on routine cleaning.
Information on watch caliber and type.
Details on water resistance ratings and suitable usage.
Explains how magnetism affects timekeeping.
Lists everyday items that can affect the watch.
Detailed care instructions for different band materials.
Advice on band fit and potential skin reactions.
Introduction to A, B, and C type special clasps.
Instructions for operating B and C type clasps.
Details on the battery and cautions for replacement.
Explanation of the battery's overcharge protection.
Notes on where and how to charge the watch safely.
Explains how Lumibrite works and its luminous properties.
Details on warranty, repair, and available parts.
Advice on regular maintenance for optimal performance.
Detailed procedure for manually receiving radio signals.
Steps for reception completion and checking results.
Solutions for failed or no reception.
Detailed instructions for manual time setting.
Detailed instructions for manual date setting.
How the watch automatically corrects hand positions.
How to manually set date and hand positions.
Continued steps for setting the date's preliminary position.
Detailed steps for setting hour/minute hand preliminary positions.
Solutions for date errors and unresponsive controls.
Troubleshooting for time gain/loss and hand misalignment.
Procedure for resetting the watch's integrated circuit.
Details on basic features, frequency, accuracy, and operational range.
Covers power source, drive systems, and radio signal reception capabilities.
Information on the integrated circuit and battery life.
To Next Page
