Seiko 2J31 Instructions Manual page 61

○ In order to maintain the water resistant
performance at factory-adjusted level,
Cautions
make sure to replace the gasket when
changing the battery.
The watch withstands accidental contact
with water in everyday life.
The watch is suitable for sports such as swimming.
The watch is suitable for diving not using an air cylinder.
Condition of Use
Avoid drops of water or sweat
WARNING
○ For a water resistant watch with
10 BAR or above, be sure to have the
water resistant performance check
when changing the battery.
Not suitable for swimming
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