This coin has a thick flan like it was struck with two flans. The weight (5.8g) is twice the normal weight and the side shot seems to show what looks like the edges of the two flans.
Constantine II
A.D. 320
19mm 5.8g
D N CONSTANTINO IVN NOB C; laureate, draped and cuirassed bust right.
VICTORIAE LAET PRINC PERP; two Victories stg., facing one another, together holding wreath inscribed VOT PR on altar.
in ex. P two captives L
RIC VII Lyons 90