this coin is not in RIC for the bust type.
more example here, including the Bastien info-
http://www.notinric.lechstepniewski.info/6lug-214b.htmlConstantine I
A.D. 307
25x26mm 6.1gm
FL VAL CONSTANTINVS N C; laureate, draped and cuirassed bust right, seen from the rear.
GENIO POPVLI ROMANI; Genius standing l., modius on head, loins draped, r. holding patera, l. cornucopiae; altar to l., N in r. field.
In ex. PLG
RIC VI Lyons –