Marcus Aurelius, as Caesar. 152-153 AD. AR Denarius. 3.8 g. 

AVRELIVS CAESAR AVG PII FIL, bare head right.
TR POT VII COS II, Genius Exercitus or Virtus standing left by altar, holding patera and legionary eagle. 

RIC III 458 (Ant Pius); BMCRE 804 (Ant Pius); RSC 661.

CNG ebay sale, April 2001