Mike,
Good question. I don't think you can regulate it. It may have a trimming screw, not probably not - even so these are for very very fine adjustments.
I'm pretty are that they are pre-set, so large loss of time like this points to there being a problem, one that regulation would not sort out. Maybe a service would sort it out.

Stewart

: High folks.

: I just buy a black coral and again the sellers meaning,the watch
: runs 5min in 60min to slow.Is it to regulate or is a new
: quartzmovement the choice?Can i regulte it by myself?Wich screw
: i shall turn for it?

: Please help!

: greetz
: Mike