Image rights: wildwinds.com

Antoninus Pius AD 138-161 AR denarius 3.21 g.

ANTONINVS AVG PIVS P P, laureate head right.
COS IIII Aequitas standing front, head left, holding scales and scepter. 

Rome mint: AD 146 = RIC III, 127a; RSC 229; SEAR  4066.