Pertinax, absolutely amazing! and thank you so much for taking the time to translate and compile this valuable information!
So it seems clear that even weapons which 'seem' inviable as combat weapons according to western standards, in actuality were indeed used and effectively.
To the koummya question, it does appear that even in the case of the absence of guard projections on the hilt (=vestigial quillons) these daggers remain usable combatively.
This truly is wonderful insight into the actual use of the flyssa, and in the study I did on them many years ago, the major block was that these resources were in French. Clearly I should have had them translated
but in those days there were not as many such options.
I would suppose then on the koummya, that the 'souvenir' category would apply to those with less than substantial blades, and 'flimsier' character, as would be expected with many ethnographic forms in such character.