Constantine I the Great AD 307-337 AE Follis, 3.27g, 20.02mm
Rome 3rd officina AD 320

obv. CONST - ANTINVS AVG, Bust, cuirassed, helmeted, r.
rev. ROMAE A - ETERNAE, Roma std. r., holding shield on knee 
 inscribed with XV. Shield beside, exergue: R EPOC P

RIC VII, Rome 194 R3, good F

Contributed by Dr. Hubert Lanz, auction November 2000, 
Added July 2011.