ID help needed

[Kamil]

Hi all!
I've watched the discussions here since a long time, and now I need your help. I've just obtained this piece. It's 33,2 cm long; on both sides of the blade there are incised lines, possibly originally all of them inlaid with copper (now most of it missing); next to the lines square brass plates with incised geometrical ornament are fixed on both sides of the blade. The trapezoid element between the blade and the hilt is rather loosely fitted (as is the hilt itself) and on one side, along the edges, it has lines inlaid with copper wire (?). The hilt is made of a dark wood, studded with elements made of silver (or silver coloured) wire. The pommel consist of alternating bone, copper, brass and wooden elements. The construction of the pommel reminds Tuareg daggers - possibly this could be a clue? The provenance of this piece cannot help: it comes reportedly from somewhere in Germany, but this information is by no means certain.