Marcus Aurelius, as Caesar under Ant. Pius. Struck AD 158-159. 7.12 g. 

AVRELIVS CAES ANTON AVG PII F, bare-headed, draped bust right.
TR POT XIII COS II, Apollo standing left, holding patera
and lyre.

RIC 477b; Sear 4771; Cohen 736.

With permission of Dane's bank, UBS Numismatics, June 1998.