African Mask Central African hardwood mask - partridge wood? Panga Panga?

This lovely old mask is carved from african hardwood.  Appears to be partridge wood.  25 cms tall.  The mask has facial scarification marks and is a real beauty.  The ancient label affixed to the back is hard to read but appears to have “congo” on it as well as other illegible writing.   There is natural crack which has been filled.   See pictures.  Please dont hesitate to ask any questions.