Unusual North African sword with European style hilt

An interesting antique north african hausa sword of good quality, probably from Northern Africa, Nigeria or Bornu. The hilt formed as a european style hilt, similar to those of the naval cutlasses of the 19th century, with a wide circular handguard, and a knuckleguard, with a rectangular slot at the top. The grip of a piece of bone, all decorated with geometric motifs. Good solid steel blade, again similar to those of european naval cutlasses. The original scabbard of leather with decorations, and a simple steel chape. 19th century