Constantine I The Great (307/310-337) AE (Bronze, 3.52g, 19mm), Nicomedia.
Obv: IMP C FL VAL CONSTANTINVS P F AVG, Bust of Constantine I, radiate, draped, cuirassed.
Rev: IOVI CONS-ERVATORI: Jupiter, nude, chlamys draped across left shoulder, standing left, holding Victory on globe in right hand and leaning on eagle-tipped sceptre with left hand; to left, eagle holding wreath; to right, captive. X/IIΓ in right field, in exergue SMNA.
Ref: RIC 43.