Valerian I AR antoninianus 4.69 gm. Viminacium, AD 253-255. 

IMP VALERIANVS P AVG, radiate, draped bust right.
CONCOR EXERC, Concordia standing left, sacrificing at altar
and holding cornucopiae. 

RIC 233; RSC 36.

Heritage World Coin Auctions, CICF Signature Sale 3014, April 2011.