Power reserve indicator

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.)

The continuous operating time of the watch may vary depending on the condition of use, such as the number of hours you wear the watch or the extent of your movement while wearing it.

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

Power reserve indicator
Power reserve indicator
Winding state of the mainspring		Fully wound	Half wound	Unwound
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.
Number of hours the watch can run	5R series	Approximately 72 hours (3 days)	Approximately 36 hours (1.5 days)	The watch either stops or is running down.