Herennia Etruscilla, Potin Tetradrachm of Alexandria. Year 2. AE22, 13.43 gr. 251 AD. 

ER KOVP AITROVCKILLA CE, draped bust right, wearing stephane.
L-B, Athena, standing left, holding Nike and spear, shield
at foot.

Milne 3818
Rare

Contributed by Masis Panos, April 2013.