Watch List notes:

Constantine II AD 317-340, as caesar, Siscia Mint, ca. AD 320-321.
Laureate head of Constantinus II right, CONSTANTINVS IVN NOB C;
VOT_X within wreath, CAESARVM NOSTRORVM around, in exergue _SIS*
RIC VII 166. Sharp details. Toning. Small flan crack. Slightly off-centre. Very fine. Size: D: 18.9mm; 2.97g