Struck for Emperor Marcus Aurelius at the Rome Mint.
Dated: TR P XX IMP IIII = Summer to Dec 166 CE.
Approx. 18mm, 3.24g, RIC 159, RSC 435.
Mature fully bearded portrait, well struck, centered with full legends and nice surfaces.
Certified by NGC XF Strike 5/5 Surface 4/5 (very high subgrades).
Obverse: M ANTONINVS AVG ARM PARTH MAX, laureate head facing right.
Reverse: PAX in ex. TR P XX IMP IIII COS III, Pax standing left holding branch and cornucopia.
Pax was the goddess and personification of peace. Apparently a commemorative type to celebrate peace after the hard fought victories over the Parthians. VIC PAR types also minted during this date period.