Silver antoninianus, 21mm, 4.82gm, issued AD 251/252. Antioch mint.
Obv: IMP C C VIB TREB GALLVS PF AVG, Laureate, draped bust facing right, four dots beneath.
Rev: SAECVLVM NOVVM, Hexastyle temple with statue of Roma at centre, four dots below.
Dark toning, scarce.
This is a revival of the 1000th anniversary of Rome piece issued by Philip only four years earlier.