324-325 AD Roman Empire (Scarcer Mintmark SMT = Ticinum, modern-day Piacenza, Italy) Helena AE2 Bronze Centenionalis 27mm 9,9g
Obverse: FL HELENA - AVGVSTA: Bust of Helena, wearing necklace and mantle,
Reverse: right, Securitas, draped, standing left, raising pallium with right hand and lowering branch with left hand