How often should an automatic require manual winding?

[strafer_kid]

Originally Posted by padi56

Well that depends on the wrist activity and how much power reserve the main spring has to start with.But agree if when worn with sufficient wrist activity the movement could run continual but it might not be at peak power reserve.So it will do no harm whatsoever to give a full wind say once a week even when worn.And most crown related problems are mainly down to the winding crown not being used.

That last line/point is very useful to know. The very few problems I have had with my Rolex through the years have been crown related, e.g. crown stem coming right out (despite me taking care) or crown being stiff and difficult to get to the third/setting position. I was once told that the latter can be an 'oil issue'? Had this particular problem this week with an SD16600 I had not worn for a while though it seems now to have eased up after a couple of days wearing. The date also began changing over at 10pm though after some resetting that too seems to have eased off....the joys of Rolex!