Marcus Aurelius (Caesar, 161-180) AR Denarius (Silver, 2.86g, 18mm) Rome, 148-149.
Obv: AVRELIVS CAE-SAR AVG PII F, bare head of Marcus Aurelius right
rev: TR POT III-COS II, Minerva standing facing, helmeted head right, spear in right hand, resting left on grounded shield.
Ref: RIC III (Antoninus Pius) 444