Heavy and Thick African Dagger, Ngombe or Yakoma (?) - 12768

We are not sure as for the origin of this unusual African knife. May be Yakoma or Ngombe. It is in a way outstanding in its blade structure: The thickest and heaviest we have seen. 9 inches long, 4 inches wide and 10 mm thick at its base, Very well forged and well sharpened all around. Wood handle bound with brass strips and twisted steel wire on the pommel (partially loose). Total length 14 inches. Very good condition.