This mintmark is not listed in RIC with a G10 bust, it should come after RIC 408. Alten & Zschucke list this type as #148, but only note officina P.
Constantine II
A.D. 323
19mm 2.8gm
CONSTANTINVS IVN NOB C; laureate, draped and cuirassed with spear pointing forward, globe in left hand.
BEATA TRANQVILLITAS; globe set on altar inscribed VO/TIS/XX; above, three stars.
In ex. dot STR crescent
RIC VII Trier ---
