312-313 AD., Constantinus I, Rome mint, Follis, RIC 349a.

Constantinus I (Constantine), Rome mint, officina 4, 312-313 AD.,
Æ Follis (20-22 mm / 2,83 g),
Obv.: IMP CONSTANTINVS P F AVG , laureate and cuirassed bust of Constantine facing right (RIC type 1b D ).
Rev.: S P Q R OPTIMO PRINCIPI / R Q , legionary eagle facing l. between two vexilia.
RIC VI, 390, 349a (common) .