How to: Seiko Sportura Battery Replacement 

How to, step by step instructions to replace the battery on this Seiko Sportura quartz chronograph. Topics covered include opening the caseback, removing and inserting the battery (in this case a Renata 399), removing, replacing and re-lubricating the caseback gasket, closing the caseback, and resetting the chronograph center seconds hand and accumulated minute hand back to zero.
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