I have a similar sword in my collection with what I think is its original scabbard. These swords are similar to the Mandingo sword but to my knowledge they belong belong to the Toma people, that live close to the Mandingo. Unfortunately I received this suggestion from a friend of mine and I am not able to find a reference. Therefore this is simply a suggestion to further investigate on it. The Mandingo has a rounded handguard and a simmetric round leather protection close to the pommel that is frequently made of brass. My blade has geometric decoration at the forte made of zig zag motif and dots close to the margin that would suggest it is a local production. It has also two holes filled with white metal (iron ? tin ?). A very peculiar similarity is the leather work of the handle.