Marcus Aurelius (161-180) AR Denarius (Silver, 2.85g, 18mm) Rome, 166.
Obv: M ANTONINVS AVG ARM PARTH MAX, laureate head to right
Rev: TR P XX IMP IIII COS III, Pax standing to left, holding branch and cornucopiae; PAX in exergue.
Ref: RIC III 159 corr. (Pax seated);