Check out this tread - it should help. Your watch is not working properly. Send it back or request a refund for service - 10 minutes a day is WAY Off.
http://chronocentric.com/forums/heuer/index.cgi?page=1;md=read;id=63402

: It's great to hear that the watch has been restored and that you
: are happy with the way the watch looks.

: Now, for some amateur advice regarding winding and wearing.

: I do not believe that there is an real risk of over-winding an
: automatic watch. Yes, you can keep winding it, even when it is
: fully wound, but the watch is designed to accommodate this.
: Imagine that you go for a long run or a brisk walk, and the
: automatic mechanism is "winding" the watch all the
: time . . . thus it is designed so that it cannot be over-wound.

: My practice with the automatic watches is to give them a strong
: wind when I put on the watch for the first time -- probably
: something like 30 or 40 turns of the crown, even though I have
: never counted -- and then wind it again every few days, even
: though the watch is still running and probably well-wound, from
: the motion of my wrist.

: In my experience, accuracy of the Caliber 12 movements should be
: within 30 seconds per day . . . and many of them will do much
: better than this. Losing 10 minutes per day would not be
: acceptable and evidences a problem that should be fixed. But
: before we declare that there is a problem, give it a strong
: winding, put it on your wrist, and let's see how it will
: perform.

: Jeff

: ++++++++++++++++++++++++

: