OBVERSE: TINC on rectangular tabelet, C above, A below, beaded border
REVERSE: Male gorgon-head facing, with bull's horns and 'snake' each side
The obverse die flaw is present in at least 10 of the images I have seen of this coin. Evans first called this a female Medusa head and the "fiction" has persisted. Dr. Loyd Lating says in Celtic Coin Bulletin 1, 1991: the head "appears to have horns, implying a Celtic divinity". The deity may be Cernunnos, a horned deity who is usually accompanied by ram-headed snakes which are one of his identifying characteristics.
10 of 22 known specimens in museums