Macrinus and Diadumenian, AE Pentassarion, Markianopolis, 
Moesia Inferior. Magistrate P. Furius Pontianus.

Obv: AUT K OPEL SEU MAKRINOS K M OPE ANTWNEINOS, 
laureate head of Macrinus right facing bare head of Diadumenian
left.
Rev: UP PONTIANOU MAR-KIANOPOLEITWN, Athena standing left,
 holding owl and inverted spear, Square E at centre right.

Varbanov 1170; Megaw MAR5.15d.

Courtesy of Zeus Coins on ebay, March 2011.