Is it possible to identify this bottle and its contents? My brother-in-law received this bottle while in a soccer recruit tryout in Yugoslavia(?) around 6ths year 2000. We haven't been able to identify it by anything on the label. It was opened, I think it is brandy but it is beyond its best years. If you look closely it has a wooden cross in the bottle. I have other pictures. I think it could have been made by a monastery. Any ideas?
The label looks like Serbian, and says: 

Гарантовано природна (garantovano prirodna) = Guaranteed Natural
стара 10 година      (stara 10 godina)      = Aged 10 Years


I don't see anything that identifies it further. But if this was offered as a "typical" Yugoslav gift, it might well be barrel-aged plum brandy (slivovitz).