Constantine I 'the Great' (307-337) AE Nummus (Bronze, 2.92g, 18mm) Nicomedia, 317-320.
Obv: IMP CONSTANTINVS AVG, laureate and mantled bust to left, holding mappa, globe and sceptre
Rev: IOVI CONSERVATORI AVGG, Jupiter standing to left, holding Victory on globe and leaning on eagle-tipped sceptre; palm branch at feet to left, Δ in right field, SMN in exergue.
Ref: RIC VII 23.