Antoninus Pius. AE Sestertius. 140-144 AD. Rome. 

ANTONINVS AVG PIVS PP TR P, laureate head right
COS IIII S-C, Securitas seated left, holding sceptre and 
propping head on left hand. 

RIC 764; Cohen 298, rated common

With permission of Roma Numismatics, October, 2009