This is called an Angbai mask by the Toma people of Guinea/Liberia. The mask is of classical form with four small horns slanting from the top, the brow heavy and with large nose and tiny eyes to either side, the brow ridge with linear patterns. The Angbai is a common style that is often on the market. They are never painted and always look old and used. My advice to collectors who can’t afford masks with documented provenance, is look for good design and craftsmanship… and pay for it as if it was a reproduction. This one certainly looks like an A. 1386
