issued by Constantine I the Great in memory of his father Constantius I Chlorus who died in 306AD
obverse: DIVO CONSTANTIO PIO, laureate, veiled and cuirassed bust of Divus Constantius I Chlorus right
reverse: MEMORIA FELIX, altar with eagle at each side, PTR in ex.
material: billon
max.diameter: 25mm
weight: 6.3g
reference: RIC VI 789, RCV 16420