This first issue for Constans from Heraclea mistakenly has IVN in the obverse legend.
Constans
A.D. 333- 336
18mm 2.7g
CONSTANS IVN NOB C; laureate, draped and cuirassed bust right.
GLORIA EXERCITVS; Two soldiers helmeted, stg. facing one another, reversed spear in outer hands, inner hands on shields resting on the ground; between them two standards.
in ex. SMHB✶
RIC VII Heraclea 139