Marcus Aurelius, as Caesar, AE Sestertius. 156-157 AD. 
28.55g
33mm 

AVRELIVS CAES ANTON AVG PII F, bare head right
TR P XI COS II S-C, Felicitas standing left, holding 
caduceus and sceptre.

RIC 1336. Struck under Ant. Pius; Cohen 742.

With permission of Roma Numismatics, August, 2009