Commodus AE20, 3.51g; 20mm, 176-192 AD. Coela, Thrace. 

Obv: IMP CAES MAR COMMO, bare-headed, draped bust right
Rev: AELI MVNICIPI COILA, above and below prow right, corn ear above. 

RPC temp. 9610; Vienna 9158; Varbanov 2906.

With permission of Roma Numismatics, December, 2009