Image rights: wildwinds.com

Antoninus Pius AD 138-161 AR denarius 2.65 g. 
ANTONINVS AVG PIVS P P TR P XV, laureate head right.
COS IIII - Vesta standing left, holding simpulum and 
palladium. 

Rome mint: AD 151-152 = RIC III, 203; RSC 196; Sear -.