Two similar Congo swords to identify

[Pieje]

Originally Posted by Freddy

In the book 'Seltene Afrikanische Waffen' (Rare African Short Weapons) by Manfred A. Zirngibl (1983), 2 similar pieces are shown on page 40.

I checked this reference: the braided cord covering of the hilt ("typical of the Ngbandi") is identical to the one on figure 36 ("Lokele"). Also the engravings on the blade, especially at the beginning, correspond almost perfectly ("Zande region").
Both these swords look very old to me.
Thanks!