Seiko 5D22 Instructions Manual page 13

Ex.) How to read the scale table of power reserve and generated power.
Scale.marking. Power.reserve
3 Not.shorter.than.9.hours.
and.not.longer.than.12.
hours
9 Not.shorter.than.2.days.
and.not.longer.than.3.days
17 30.days
Scale.marking. Generated.power
3 1.hour.or.more.
9 3.hour.or.more
18 6.hour.or.more
1