rated as common, but this one is really nice and silvered
Constantine I
A.D. 312- 313
21x23mm 4.1gm
IMP CONSTANTINVS P F AVG; laureate and draped bust, seen from the rear.
GENIO POPV-LI ROMANI; Genius standing left, modius on head, naked but for chlamys over left shoulder, right holding patera, left cornucopiae.
In ex. RS
RIC VI Rome 293a