Helena, 324-325 AD. Æ Follis. 326 AD. Trier.

FL HELENA AVGVSTA, diademed and draped bust right
SECVRITAS REIPVBLICE, Securitas standing left, holding branch 
in right hand

Mintmark PTR dot in crescent

RIC VII 481; LRBC 35. 

With permission of Roma Numismatics, November, 2009