I got this coin a few months ago.
It has a nice but atypical Constantine's portrait.
O//: CONSTANTINVS NOB CAES
R//: VIRTVS AVGG ET CAESS NN
E//: AQGamma
RIC VI Aquileia 100b (R)
28mm x 9,8gr
Struck by Severo II in the name of Constantine I between july 306 and march 307.