The Yamari aspect of Yamantaka has a human face with three eyes, bared fangs and orange hair. The Vajrabhairava aspect has at least one buffalo head.
Red Yamari with one head and two hands, standing in embrace with his consort atop a human victim lying on the back of a prostrate bull. When his right arm is raised he usually holds a stick tipped with a human head, and has a skull cup in his left hand. She holds a skull cup and a flaying knife and wears a bone apron, he wears a tiger skin loin cloth and often has a half-vajra finial on his flaming hair.
They may stand directly on the back of the male buffalo.
In his sahaja form Vajrabhairava has one head and two arms and always stands alone. Easily confused with Yama Dharmaraja, he holds a flaying knife and a skull cup before his heart (rather than his right arm being outstretched) and steps on a male victim, often on a prostrate bull. In this case the animal has a dakini engraved on its rump. Vajrabhairava, naked and ithyphallic, is adorned with a garland of severed heads, bone ornaments and a skull crown, and may have the hide of an elephant on his back.
We saw a very similar sculpture dated 14th century (see here: Sotheby’s).
He has 9 heads, 34 hands, 16 legs, his main hands holding a flaying knife and a skull cup, the top ones holding an elephant hide behind his back, the others have a variety of peaceful and wrathful implements. His right legs are bent and would have been crushing Hindu gods and mammals, his left legs are stretched and would have trampled gods and birds. In this case he has three rows of three heads, the top one is Manjushri’s head.
Alternatively his heads are arranged in a row of seven, plus one angry head, plus Manjushri’s at the top. Note the two figures seated at the front of the lotus base, one of them with four arms.
The same form in embrace with his consort, who holds a skull cup and a flaying knife.