Commodus as Caesar, AR Denarius, struck under Marcus Aurelius, AD 175-176. 

COMMODO CAES AVG FIL GERM SARM, bare head right.
DE GERMANIS, Trophy, composed of helmet, cuirass, shields 
and spears with two captives sitting back to back at its 
base. 

RIC 607; BMCRE 642; RSC 77.

With permission of cngcoins.com, Oct 2004.