Bronze AE3, 18mm, 2.63gm, issued AD 322-325 Ticinum mint.
Obv: CONSTANTINVS IVN NOB C, Diademed, draped and cuirassed bust facing right.
Rev: DOMINOR NOSTROR CAESS VOT X (QT᛫ in ex.), Vows in wreath.
References: Sear 17208, RIC 172.