Constantine II as caesar (317-337), Cyzicus, AE follis (Bronze, 21,3 mm, 2,74 g).
Obv: D N FL CL CONSTANTINVS NOB C, laureate, draped and cuirassed bust of Constantine II to right.
Rev: IOVI CONS-ERVATORI, naked Jupiter, standing facing, head left, holding Victory on globe and scepter, at feet eagle on left, captive on right, X - IIΓ to right, SMKA in exergue.
Ref: RIC 19.