Seiko CAL. 6R20 - Manual (Page 12)

English
12
HOW TO READ THE 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 enough power stored 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 winding
state of the
mainspring
The number
of hours the
watch can run
Fully wound 1/3 wound Unwound
Approximately
45 hours
Approximately
15 hours
The watch either stops
or is running down.
Power
Reserve
Indicator