Watch List notes:

Constantinople. Dedication of the City. A.D. 330. Æ (billon). 1 gm. 15 mm. Laureate and draped bust of the Genius of the Roman people left, cornucopia over shoulder; POPROMANVS around / A bridge over a river, towers at each end; CONS over officina Δ between the towers. RIC VIII Constantinople 21 (see also p. 442). Vagi II: 3043. Near Extremely Fine; brown patina; light porosity; fine early style. Scarce.David Vagi suggests that this reverse depicts the famed Milvian Bridge over the Tiber River. Constantine battled Maxentius there in October of AD 312 allegedly after a vision that led to his conversion to Christianity.