Bornea/Dayak mortar?

[Tim Simmons]

This is new stuff for me. Looking at this item, the human head seems to have a big bum to the side. I thought this rather odd. Then I though perhaps the head is part of a horse? So I googled and found.


AI Overview
A human-headed horse in regional Southeast Asian and Bornean cultural touchpoints typically refers to the Buraq (Borak in local Malay/regional dialects), a celestial winged steed with a human face and an equine body prominent in regional Islamic folklore and traditional art.