Seiko 8F35 Instructions Manual page 13

WHILE DIVING
Do not operate the crown when the watch is wet or in water.
Take care not to hit the watch against hard objects such as rocks.
Bezel rotation may become slightly harder in the water but this is not a malfunction.
AFTER DIVING
After checking that the crown is screwed in completely, rinse the watch in fresh water, and wash out
all seawater, soil, sand, etc.
After cleaning the watch in fresh water, be sure to wipe it thoroughly dry to prevent possible rust on
the case.
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