Constantine I the Great (307-337) Commemorative Series, 330-354 AE Follis (Bronze, 3.03g, 19mm) Thessalonica, 336-7.
Obv: VRBS ROMA Helmeted and mantled bust of Roma to left.
Rev: SMTSE, She-wolf standing left, suckling Romulus and Remus; above, two stars .
Ref: RIC 229