The power reserve indicator lets you know the winding state of the mainspring.
Before removing the watch from your wrist, observe the power reserve indicator to check if the watch has stored enough power to keep running until the next time you wear it. If necessary, wind the mainspring.
(To prevent the watch from stopping, wind the mainspring to store the excess power that will allow the watch to run for extra time.)
Power reserve indicator
Power reserve indicator
Power reserve indicator
The power reserve for automatic winding type watches (5R series) varies depending on your use conditions (watch wearing, time of use, amount of movement during use, etc.).
In a case where you wear the watch for a short period of time, observe the power reserve indicator to check the level of the remaining power. If necessary, manually wind the mainspring.
How to read the power reserve indicator
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Power reserve indicator |
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Winding state of the mainspring |
Fully wound |
Half wound |
Unwound |
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Number of hours the watch can run |
7R series |
Approximately 48 hours (2 days) |
Approximately 24 hours (1 day) |
The watch either stops or is running down. |
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5R series |
Approximately 72 hours (3 days) |
Approximately 36 hours (1.5 days) |
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<For 7R31>
The power reserve indicator is on the case back of the watch.
Power reserve indicator
Power reserve indicator
How to read the power reserve indicator
|
Power reserve indicator |
 |
 |
 |
|||
|---|---|---|---|---|---|---|
|
Winding state of the mainspring |
Fully wound |
Half wound |
Unwound |
|||
|
Number of hours the watch can run |
Approximately 72 hours (3 days) |
Approximately 36 hours (1.5 days) |
The watch either stops or is running down. |
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The crown cannot be turned further when the mainspring is fully wound to prevent overwinding of the mainspring. Do not try to forcefully turn the crown as this may damage the watch.