A very interesting variety of denarius with a portrait of Marcus Aurelius as Caesar on the reverse.
Obverse: Emperor's head to the right, in the rim legend ANTONINVS AVG PIVS P P TR P COS III
Reverse: Head of Marcus Aurelius to the right, in the rim legend AVRELIVS CAESAR AVG P II F COS
Silver, diameter 18.5 mm, weight 2.37 g.