This coin has a G10 bust which is not listed in RIC. It should come after Rome 156.
Constantine II
A.D. 318-9
CONSTANTINVS IVN NOB C;laureate, draped and cuirassed with spear pointing forward, globe in left hand.
ROMAE AETERNAE; Roma std. r., shield in lap inscribed X/V; in fields P/R.
in ex. RT
RIC VII Rome --