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● When replacing the battery, we recommend that you contact an AUTHORIZED SEIKO
SERVICE CENTER. In that case, after every battery change, a new “●” mark will be inscribed
on the case back at the position corresponding to the next battery replacement time. Be sure
to check the mark before using your watch again.
● Refer to the table below for the proper battery and battery life corresponding to your watch.
Calibre No.
Battery life
(Approx. years)
SEIKO SR43SW 5
SEIKO SR920SW 4
SEIKO SR621SW 2
7C46
Battery
7N36, V736
7N85
Note: Since the battery in your watch was inserted at the factory, its actual life, once in your possession,
may be less than the specified period.