Antoninus Pius AE Sestertius, 29-31mm; 21.61g. AD 145-161. 

ANTONINVS AVG PIVS P P TR P COS IIII, laureate head right.
S-C across fields, Securitas, draped, seated left, holding 
sceptre and resting head on left hand. 

RIC 782; BMCRE 1712; Cohen 757; Sear 4222.

With permission of cngcoin.com, the AK Collection.