Marcus Aurelius AE dupondius, Rome 161/2 AD. 

Obv: IMP CAES M AVREL ANTONINVS AVG PM, radiate head right. 
Rev: SALVTI AVGVSTOR TRP XVI S-C, Salus standing left nurishing snake raising 
 from altar, COS III in exergue.

RIC 839 var, Cohen 558.

 Contributed by Yuri Kabanov, January, 2007.