Rare follis minted by Constantine I the Great.
Roman Imperial
Constantine I the Great (307–337), Follis 313-315, Trier mint
Obverse: laureate, cuirassed bust right
IMP CONSTANTINVS AVG
Reverse: Sol standing front, head to left, nude but for chlamys, raising his right hand in salute and holding globe in his left, T-F across the fields, PTR in exergue
SOLI INVICTO COMITI
Diameter 25 mm, weight 5.37 g