Constantine I Æ Nummus. Rome, AD 320. CONSTANTINVS AVG, helmeted and cuirassed bust right / ROMAE AETERNAE, Roma seated right on round shield, holding another round shield inscribed X-V in two lines; RЄѠCT (ЄѠ ligate) in exergue. RIC 194 corr. (Roma seated left). 3.09g, 19mm, 6h.
About Good Very Fine. A very rare and unusual mintmark.
From the inventory of a European dealer.