IMP C C
VAL DIOCLETIANVS P F AVG (Translation: Imperator, Caesar, Caius Valerius Diocletianus Pius Felix Augustus. Supreme commander (Imperator), Caesar, Gaius Valerius Diocletian, the pious, the fortunate, emperor (Augustus).)
Reverse description
Mars, walking right, holding spear in right hand and trophy in left hand.
Reverse script
Latin
Reverse lettering
MARS
VICTOR (Translation: Mars Victor. Mars, the victorious.)