Yes, actually the last photo from my previous post was taken in the Bulgarian National Museum of Military History by my father (the person you can see in the reflection on the glass cover). Here is the whole photo of this dagger together with a few other kindjals, the little sign next to it you can barely see reads "Kama, Balkan Type" in Bulgarian:
If I am not mistaken, sometime ago on this forum there was a dagger of the same type posted that had markings of a cutlery in the town of Gabrovo, Central Bulgaria. I found it, unfortunately the pictures are long gone:
http://www.vikingsword.com/ubb/Forum1/HTML/002483.html
Perhaps Ariel has kept them or has a similar one?
I do not have any written material, since, well, there has been very little material on Bulgarian edged weapons from that period, just one book called "Weaponry of the Past" by Nikola Daskalov and Viara Kovacheva, Sofia Press 1989, in English, but unfortunately it is mostly on firarms and has just a few examples of edged weapons, among which none exactly like this particular one.
But yes, this particular brass frame is Bulgarian, I am absolutely sure about it. The circles decoration is not untypical of the Balkans at all, I have seen it on Bulgarian, Greek and Bosnian pieces.
I hope Ariel wil read this and support it with further examples, and possibly provide some clues as to the three mystery items.
Regards,
Teodor