Girard Perregaux used to run a small, customer-only forum on their website and they were very good at fielding these sorts of questions, albeit a little slowly. For example they authenticated this:
It may be that a change of direction means that they have no interest in this sort of thing (and, let's face it, Longines seem to be unique devoting suitable resources) or they may have shifted their effort to social media. My inclination would be to check their Facebook/Twitter/Pinterest/Instagram stuff to see if there's an example where they've helped somebody else and, if so, stick this query up there.