Antoninus Pius AE As, 16-18mm; 10.51g. AD 148-149. 

ANTONINVS AVG PIVS P P TR P XII, laureate head right. 
FELICITAS AVG, S-C across fields, Felicitas, draped, standing 
front, looking right, holding long caduceus, vertical, and 
corn-ears in fold of robe in left; COS IIII in ex. 

RIC 860a; BMCRE 1835; Cohen 369.
Very rare.

With permission of cngcoin.com, the AK Collection.