Hi, Sensei!
As far as I know (and I know little) there are identically placed rings on khybers also. Tirri (or maybe someone else, I just do not remember) says that it was used for fastening the sccbbard to the belt with an aditional cord.
Thatone it is almost certainly from Montenegro. Well "almost" 'cos thoose from Montenegro usually have larger ears. If I saw it, it would be mine now
