Volusian. Antoninianus. 251-253 AD. 

Obv: IMP C C VIB VOLVSIANVS AVG, radiate, draped bust right
Rev: LIBERALITAS PVBLICA, Liberalitas standing left, holding 
pileus and transverse sceptre. 

RIC 210, rated Rare.

With permission of Roma Numismatics, June 2009