City Commemorative, Siscia, AE follis, 335-337.

VRBS ROMA, helmeted head of Roma left, wearing imperial cloak 
and ornamental necklace 
She-wolf standing left, suckling Romulus and Remus, two stars above. 

Mintmark: Gamma SIS. 

RIC VII Siscia 222.
 

With permission of Numismatik Lanz, auction 102.
Lanz 102, 1004
(Image artificially coloured, as the original was b/w).