Nerva AE Dupondius. 

Obv: IMP NERVA CAES AVG P M TR P COS II P P, radiate head right 
Rev: LIBERTAS PVBLICA S-C, Libertas standing left, holding pileus & scepter. 

RIC 65, Cohen 109.

With kind permission of www.edgarlowen.com, Oct. 2011.