Julia Domna AE21 of Pionia, Troas. AD 193-217. 6.21 g.

IOYLIA DOMNA CEBA, draped bust right, countermark of male head right.
PIONEITWN, Serpent with head left, coiled on altar. 

SNG von Aulock 1567; Paris M3098. 

With permission of Leu Numismatik, Auction 3, lot 544, Feb. 2018.