Antoninus Pius, AE dupondius, Rome, 145-161 AD, 25mm; 10.4g. 

ANTONINVS AVG PIVS PP TR P COS IIII, radiate head right.
FELICITAS AVG, S-C across fields, Felicitas standing front,
head left, holding capricorn and caduceus.

BMC 1734; RIC 800.
Rare
Contributed by Ars-Aeterna / David Suter, Switzerland, August, 2011