Constantine I AE follis, AD 321-323, Antioch mint.

IMP C FL VAL CONSTANTINVS PF AVG, radiate, draped and cuirassed bust right.
IOVI CONSERVATORI, Jupiter standing left, chlamys across left shoulder, holding Victory on globe and leaning on sceptre with eagle, eagle with wreath at foot left.

XII Mu and seated captive in right field.
Mint mark: SMANT Gamma

RIC VII Antioch 34.
Rated R3. 

Contributed by John Cechini, April 2020.