This coin is not listed in RIC for this bust type paired with obverse legend, it should be listed after 290
Constantine II
A.D. 320
19mm 2.5gm
CONSTANTINVS IVN N C; Laureate and draped bust left, Victory on globe in right hand, mappa in left.
VIRTVS EXERCIT; Trophy standing on ground, captive seated on either side, T/F in fields.
In exergue PTR
RIC VII Trier --