I saw this old thread and it reminded me that I actually bought this coin in 2020...for much less than the original 2,000 euros.
It was struck with two flans stuck together
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 Lyon 90