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· Researcher
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5,312 Posts
Try an SR43W - as some of the other battery types are now universal and may not fit properly.
 

· Researcher
Joined
·
5,312 Posts
According to the latest Seiko list - it's an SR43W.
Battery manufacturers have, over the years reduced the number of batteries they make and have made a few sizes multi -fitment - with the result of batteries not fitting correctly.
Therefore a modern 386 may not have the correct dimensions, this is a known problem, and has been discussed on the forum before.
 
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