Silver antoninianus, 21mm, 3,42gm, issued AD 251/252. Rome mint.
Obv: IMP CAE C VIB TREB GALLVS AVG, Radiate, draped bust facing right.
Rev: LIBERTAS AVGG, Libertas standing holding pileus and sceptre, star in left field.
References: Sear 9634, RIC 38, RSC 63a.