My Bell & Ross Demineur has a small issue in as much as the date doesn't always change over at midnight and sometimes sticks between 2 dates.

It doesn't always do it - if it does, I just alter it by either rotating the hands around again to midnight and resetting the time or alternatively I just use the quick set date change.

I'm aware of the don't change dates just before/after midnight.

Everything else works fine so I don't think its simply a battery issue.

Any ideas what's likely to be causing this?

I've used various decent watch repair guys over the years but they don't tend to touch quartz - any forum members out there who would be able to have a look at this and sort for me?

Cheers,
Phil