Diadumenian, AE25 of Nikopolis ad Istrum. 

K M OPPEL DIA-VMENIANOC, bare-headed bust right.
UP AGRIPPA NIKOPOLITWN PROC ICTR-W, Homonoia standing 
left by altar, kalathos on head, holding patera and cornucopiae. 

Moushmov 1336 var (odd legend and bust type)

Not in Varbanov or Moushmov etc. Strange bust type and 
incomplete obv. legend.

Sold by oldromancoins.com on ebay, 2003.