Helena, AV Solidus, Nicomedia. 

FL HELENA AVGVSTA, diademed, draped bust right.
SECVRITAS REIPVBLICE, Securitas standing left, holding branch.

Mintmark SMN Delta.

RIC VII Nicomedia 80; Depeyrot35/4; Sear 16588.

With permission of Freeman & Sear, auction 2002.