Thank you Marius.
However may i be skeptical about the suggested origins of both my sculpture and the example you show
I know a little about Macondes; i have been in contact with them during my army service in norther Mozambique. I saw them working the black wood and even bought a couple pieces to bring home; the religious images version, for my mother. In the version of human images they usually depict faces like their own, deeply tattooed. So when i see someone announcing a Maconde bust with a plain face i immediately doubt it is genuine. I might be wrong but ...
Also that know of, they are known to basically work black wood, not ivory... but again.