Constantine II AE follis, Rome. AD 316-377.

CONSTANTINVS IVN NOB C, laureate, draped and cuirassed bust right.
ROMAE AETERNAE, Roma seated right, shield at her side, inscribing XV in two lines on a shield set on her knee.

Mintmark R EPWC S (PW ligate).

RIC VII Rome 200. 

With permission of Leu Numismatik AG auction 28, Lot 4731, Dec. 2023