Licinius II, AE follis, Rome mint, AD 318-319.

LICINIVS IVN NOB C, laureate, draped, cuirassed bust right.
VIRTV-S AVGG, campgate, four turrets, seven layers, open doors.
P-R across fields.
Mintmark R dot S dot 

RIC VII Rome 192; Sear 15460.
(RIC does not mention the dots in the mintmark)

Contributed by Miro J. July 2016.