RIC lists this type as Sol with chlamys across l. shoulder; while on this coin the cloak is spread over both shoulders.
Constantine I
A.D. 316- 317
19x20mm 3.7g
IMP CONSTANTINVS P F AVG; laureate, draped and cuirassed bust.
SOLI INVICTO COMITI; Sol rad., stg. L., raising r. hand, globe in l., chlamys spread, captive to left wearing Phrygian cap.
in ex. RP
cf. RIC VII Rome 52