The mask is from the Gurung tribe in Nepal and made from the  dense redish ‘blood-wood’ or in Nepali;  Raktachandan.
The Gurung is a Tibeto-Burmese group scattered over Nepal, but mainly living in Lamjung and Gorkha district.
Metal (teeth) and hair are used on the mask.  Both of these materials are used as a ‘charge’ to give the mask more power.
There is also some paint residue.
Authentic local repairs made with steel.
It has a large MDF base to accentuate the volume of the piece.
My estimate is that the mask is from the 19th century.