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Seiko solar watch losing time

5.5K views 1 reply 2 participants last post by  zepp3lin  
#1 ·
I have noticed recently that my seiko solar ssc667 has been running slow.

in the past, whenever i set it to a reference time, it usually would run fast.

watch is fully charged. Have been leaving by the window sill to get sunlight everyday during the time i have been observing it.

any ideas behind this? I imagine it cant be the usual suspect, that is a low powered battery, as it is a solar powered watch.