●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  | Battery life  | |
(Approx. years)  | |||
  | 
  | ||
7C46  | SEIKO SR43SW | 5  | |
  | 
  | 
  | |
7N36, V736  | SEIKO SR920SW  | 4  | |
  | 
  | 
  | |
7N85  | SEIKO SR621SW  | 2  | |
  | 
  | 
  | 
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.
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