Not sure about this one either but I’m pretty sure the reverse has two soldiers with spears and a standard between them.
Interregnum Issue A.D. 337 VRBS ROMA [City of Rome] Roma, helmeted, wearing imperial cloak. GLOR-IA EXERC-ITVS, Two soldiers helmeted, stg. facing one another, reversed spear in outer hands, inner hands on shields resting on ground; between them one standard. In ex. CONS[?] RIC VIII Constantinople 46 most likely struck during the few months after Constantine I's death and the purge THE SUMMER OF BLOOD. The "Great Massacre" of 337 and the Promotion of the Sons of Constantine my example
