Probably the most unusual sword of this type I have seen .. its not a Nimcha because nothing like it appears in Butins charts and the blade is double edged, however, the quillons are clearly related and the hilt with knuckle guard appears to suggest a Nimcha style ...I agree with the thoughts above entirely in that this is a weapon made in a tribal workshop using various spare parts and a general plan based upon Nimcha architecture... the detail on the scabbard is compelling as pointing to Tuareg workmanship.
The fact is that Nimcha have a single edge and a heavy back edge rather ruling out this as a Nimcha but it is fascinating and quite amazing how the style has clearly been formatted on this Tuareg workshop weapon...
THERE IS A BIG
"HOWEVER" ATTACHED SINCE IN FACT THE ORIGIN OF SPECIES IS INDICATED AS HAVING A TWO EDGE FORM AT THE START. PLEASE SEE
http://nimcha.fr/N-introd.htm WHERE THE AUTHOR ALSO TIES IN MUCH EARLIER SWORDS GOING BACK TO SWORDS OF THE PROPHET.. WITH SIMILARITIES IN QUILONS AND UPON TWO EDGED BLADES....