I just got this one in...not particularly rare, but a pretty sharp example with just a hint of silvering.
Constantine I
A.D. 319
18x20mm 3.1g
IMP CONSTANTINVS P F AVG; laur. Helmet and cuir. bust right.
VICTORIAE LAETAE PRINC PERP; two Victories stg., facing one another, together holding shield inscribed VOT PR on altar.
in ex. ∆SIS•
RIC VII Siscia 59