A nice specimen of this rarer type struck by Severus II in the name of Constantine I as caesar.
O: CONSTANTINVS NOB CAES; bust r., laur., dr., seen from rear.
R: VIRTVS AVGG ET CAESS NN] prince, with shield on left arm, galloping r. and spearing kneeling foeman; second foeman prostrate on ground. ST in exergue.
RIC VI Ticinum 83