Posthumous issue for Claudius II Gothicus.
Rare half follis of Constantine I the Great, in the Roman Imperial Coinage catalog, rarity R3.
Roman Imperial
Constantine I the Great (307–337), Posthumous Half Follis 317-318, Siscia mint
Obverse: veiled head of Claudius II Gothicus right
DIVO CLAVDIO OPTIMO IMP
Reverse: emperor seated left on curule chair, right hand raised, holding short sceptre in left arm, SIS in exergue
REQVIES OPTIMORVM MERITORVM
Diameter 16 mm, weight 1.29 g