RIC (Lyons) 17 var. AE 4
obv. DIVO CONSTANTINO P. Veiled and rosette-diademed bust of Divus Constantine r.
rev. No legend. Divus Constantine in a quadriga r., with the hand of god extending out of the sky to receive him.
RIC lists only veiled or veiled and laureate bust types for this issue, the combination with the rosette-diadem may be unique.
Discussion of this coin is available on FORVM`s Classical Numismatics Discussion Board