Constantine I, AE3 Follis, Heraclea mint, 4th officina, struck 324–325 AD.

Legend: CONSTANTINVS MAX AVG

•  Translation: "Constantinus Maximus Augustus" — Constantine the Greatest, Emperor.

•  Bust: Diademed, draped, cuirassed, facing right. The diadem style puts this after ∼324 AD when he adopted it instead of the laurel wreath.

Reverse: wreath side

•  Legend: D N CONSTANTINI MAX AVG

•  Translation: "Dominus Noster Constantini Maximus Augustus" — "Our Lord Constantine the Greatest Augustus."

•  Center: VOT / XX inside laurel wreath. VOTIS XX = vows undertaken for 20 years of rule. Issued ∼324–326 AD for his 20th year as Caesar/Augustus.

•  Exergue at bottom: SMHT

Mint & dating

SMHT = Sacra Moneta Heraclea T = Heraclea mint, 4th officina. Heraclea was in Thrace, modern-day Turkey.

Reference: RIC VII Heraclea 60. RIC = Roman Imperial Coinage, the standard catalog.