Faustina II AR Denarius. 

FAVSTINA AVGVSTA, bare-headed, draped bust right, chignon behind head, hair waved 
VENVS GENETRIX, Venus standing left, holding Victory and resting
hand on shield decorated with the Dioscuri. 

RIC 734 var; Sear 5268. (RIC describes a helmet beneath the shield).

AAH sale on ebay, 2003.