gt rider Posted October 9, 2012 Report Share Posted October 9, 2012 I have many a21j watches and I recently purchased a winder to keep them wound. However the winder I have runs quite frequently and I do not want to damage my watches by leaving them on there for days and days. I know winders can wear down movements over time but I am more concerned about them being over wound and breaking. I know gens have «slipclutches» which prevent overwinding but are reps (a21j) fitted with the same system that will prevent any damage? Thanks Link to comment Share on other sites More sharing options...
cc33 Posted October 9, 2012 Report Share Posted October 9, 2012 A watch with a rotor can't be overwound. 1 Link to comment Share on other sites More sharing options...
icoopernicus Posted October 9, 2012 Report Share Posted October 9, 2012 Aren't the Asian 21j movements pretty much a Seiko NH25A or very similar Myota movement? These are actually pretty decent movements, cheap and more than up to the task of keeping time in a sporty diver! Link to comment Share on other sites More sharing options...
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