Silver denarius of Marcus Aurelius as Caesar under Antoninus Pius.
Obverse: AVRELIVS CAESAR AVG PII F; bare head right.
Reverse: TR POT XIIII COS II D(E) SIG III; Mars standing facing, head left, resting on spear and shield.
Minted in Rome, AD 161.
Roman Imperial Coinage, volume III, page 91, number 486.