Nice shield. perfect condition and very nice back side.
Barbier Mueller / Shields, calls them : many-eyed supernatural beings.
Christian Feest / The art of war, calls them : smiling anthropomorphic figures
Arjan / Mandaukudi is selling a DVD/Cd (or whatever these shiny discs are called

) with some Dajak shield info.
Although I believe that article is in dutch there might be some additional info in that article.
Ps. I don't think this is an Utap, rather a klebit bok, for what a name is worth