Here's a nice example of this type
Constantine II
A.D. 317
Ӕ nummus 19x20mm 2.7g
FL CL CONSTANTINVS IVN N C; bare headed, draped and cuirassed bust right.
PRINCIPI• IVVENTVTIS; Prince, laureate, in military dress, cloak spread, holding spear in right and globe in left; T - F across fields.
In ex. BTR
RIC VII Trier 144