Constantine I, AE follis. Rome. AD 316.

IMP CONSTANTINVS PF AVG, laureate, draped and cuirassed bust right.
SOLI INVICTO COMITI DN, Sol standing left, chlamys over left 
shoulder, holding globe and raising right hand.

Star in left field, crescent in right field.
Mintmark RT.

RIC VII Rome 46; Sear 16126
Very rare, rated R5.

Contributed by Richard Demarco of Carpe Diem Numismatics, June 2018.