This coin is not listed in RIC for this bust type, it should come before RIC VI Lyons 244. It is in Bastien, #465. Lech already has examples-
http://www.forumancientcoins.com/notinric/6lug-244.htmlConstantine I
A.D. 307
IMP C CONSTANTINVS PF AVG; laureate and cuirassed bust right
PRINCIPI IVVE-NTVTIS; Prince standing facing, head left, in military dress, holding standard in each hand; N in right field.
In ex. PLC
RIC VI Lyons--