I already had a nice example of this type, but I really liked this one. Constantine looks especially stern and he is rocking a moustache and a little curl of hair in front of the ear.
Constantine I
A.D. 327-8
18mm 3.1g
CONSTANTINVS MAX AVG; rosette diademed head right.
GLORIA EXERCITVS; Soldier holding reversed spear in right, left hand on shield, Γ in left field.
in ex. CONS
RIC VII Constantinople 22