Vetranio (AD 350). AE3 Siscia. 

Laureate, draped and cuirassed bust of Vetranio right, A behind
CONCORDIA MILITVM, emperor standing left in military attire, holding two labara, star above his head, A in left field.

Mintmark dot Gamma SIS star. 

With permission of Roma Numismatics, auction IX, lot 846.