Constantine II as Caesar (316-337). AE Follis, Siscia mint, 328-329. D/ CONSTANTINVS IVN NOB C. Laureate head right. R/ PROVIDEN-TIAE CAESS. Camp gate with two turrets, without doors, with five or six stone layers; star above. RIC VII Siscia 216. 3.11 g. 19 mm. Centred with lovely enamel like green patina. EF.