Septimius Severus AE of Nikopolis ad Istrum, Moesia Inferior. 2.54 g. 

AY K L CEVHROC, laureate head right.
NIKOPOLI PROC IC (retrograde), Priapos standing right, holding 
his cloak open to show his erect member. 

AMNG I 1381; Varbanov 2283.

Courtesy of Helios Auction 5, March 2011