This watch has a manually wound spring drive.
You can wind the crown to wind the mainspring to drive the watch.
Guide for winding state of the mainspring
Manual winding:
Seven full rotations of the crown will provide the power to run the watch for approximately ten hours.
Observe the power reserve indicator to check the level of the remaining power.
Power reserve indicator
Under a low-temperature condition (below 0 °C), always keep at least one-fourth of the watch power, or one-sixth for 7R31, shown by the power reserve indicator.
The watch may stop if this condition is not met.
How to manually wind the mainspring
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Turn the crown at the normal position clockwise (12 o’clock direction) slowly.
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Wind the mainspring until the power reserve indicator shows a fully wound state.
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Make sure that the seconds hand is moving.
(If the watch is equipped with the screw down crown, unscrew the crown before pulling it out.)
(If the crown of your watch is a screw lock type, lock the crown.)
CAUTION
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.