Herennia Etruscilla AR Antoninianus, 249-250 AD, Antioch. 4.76 g. 

HER ETRVSCILLA AVG, diademed, draped bust right on crescent.
ADVENTVS AVG, emperor on horseback riding left, holding
sceptre and raising right hand. 

RIC 62a; RSC 2. 

With permission of Helios Auction 5, June 2010, lot 402
Added in Aug. 2011.