My guess is that it's styled after a Somalian billao dagger (I think it's perhaps Somalian in origin) .... nice item , Jpchennet .
Looks to be all hand-made too , with care put into details .
Guessing also that this was a 'working unit' , not so much a touristy item ; may be skin from something with legs (decorative sections of its' hilt) .