Herennia Etruscilla, AR Antoninianus, Antioch. AD 249-251.

HER ETRVSCILLA AVG, diademed and draped bust right on crescent. Two dots below.
ROMAE AETERNAE AVG, Roma seated left on shield, holding Victory and sceptre.

RIC IV-3, 66a; RSC 27. 
Rare.
Contributed by Richard Demarco of Carpe Diem Numismatics, April 2019.