Coin depicted roughly twice actual size*

AE3 of Constantine I

Bronze AE3, 17mm, 2.45gm, issued AD 317-320 Cyzicus mint.

Obv: IMP CONSTANTINVS AVG, Laureate, draped bust left, holding sceptre and mappa.

Rev: IOVI CONSERVATORI AVGG (SMK in ex.), Jupiter standing left, holding Victory on globe and sceptre, wreath to left, A to right.

References: Sear 15967, RIC 8.