Gentlemen, thanks a lot for your comments/advice!

I am trying to find an expert who can tell me if restoring is a "go" or a "no go". I do not see any cracks, even when looking through a magnifying-glass. But on the other hand, I don't have the hands-on experience to tell if it can be done or not. A bit of an open end, but I will post any news/progress (if any) on this one.