hola agripa, bonita moneda, creo que puede ser esta de constante II.
RIC 205 (VIII, Rome) AE2 Obv: DNCONSTANTIVSPFAVG - Diademed (rosettes), draped and cuirassed bust right, holding globe; A behind bust.
Rev: GLORIAROMANORVM Exe: R - Constantius II riding horse right, spearing kneeling barbarian to right; star above, shield and broken spear below horse. June 350 - 351 (Rome).
un saludo