Antoninus Pius, 138-161. AE Sestertius 31.5 mm, 22.89 g. Rome, struck AD 153-154. 

ANTONINVS AVG PIVS P P TR P XVII, laureate head right, slight drapery on left shoulder.
LIBERTAS COS IIII, Libertas standing front, looking right, holding pileus in her right hand and extending her left. S-C across fields.

RIC 916b2; Cohen 536. 

With permission of iNumis Mail Bid Sale 14, Lot 252, March 2011.