Gallienus, AE antoninianus. Rome. Sole reign. AD 261-262. 

GALLIENVS AVG, radiate, cuirassed bust right.
FELICIT AVG, Felicitas standing right, holding caduceus and globe. 
T in right field. 

RIC V-1 Rome 188; Goebl 478q1; Sear 10204.
Common

Image from the Dalheim hoard catalog.