Constantine I. 307/10-337 AD. AE Follis (19mm, 2.81g). Rome, 318/319 AD. CONS-TANTINVS AVG, helmeted and cuirassed bust of Constantine I right / ROMAE A-ETERNAE, Roma seated righton small round shield, inscribing X/V in two lines on shield held on knee; P-R//RQ. RIC 146.