Constantine I AE follis of Antioch. 20 mm, 4.3 g.

IMP C FL VAL CONSTANTINVS PF AVG, laureate head right.
VIRTVTI EXERCITVS. Mars standing right, holding spear and trophy, shield on left arm.

Star - Z across fields. 
Mintmark ANT.

RIC VI 163c ADD, unlisted for Constantine I.

Contributed by Richard Demarco, Carpe Diem Numismatics, May 2024.