320-321 AD., Constantinus I., Siscia mint, Follis, RIC 159.
Constantinus I., mint of Siscia, officina 1, 320-321 AD.,
Æ Follis (19-20 mm / 3.11 g),
Obv.: CONSTAN - TINVS AVG , laureate head right.
Rev.: DN CONSTANTINI MAX AVG / A SIS * , around VOT XX in laurel wreath.
RIC VII, p. 444, no. 159 .