I have a friend that works for SANU (Serbian Academy Of Science). He says that they sometimes do this kind of work for museums, but he can not guarantee accuracy based on pictures. They can, however cross reference it with items from certain period that look alike. But unfortunately they can not guarantee accuracy. Also they asked me to mention you that usually they look into items of orthodox nature.
I can however take your pictures to some antique dealers in my country and try like that. Maybe we get some info.
Or if you have some other proposition let me know, I would like to work with you on this.
All best, Branko