It looks quite similar to this one that I just got this week. Mintmark looks different though, I'm not too sure what it reads. AE Follis (?) | 3.51g | ~20mm Constantius Gallus 352-353 CE Heraclea Mint Obv: DN FL CL CONSTANTIVS NOB CAES, bust right with Δ behind Rev: FEL TEMP REPARATIO, S in left field, SMHΔ below Ref: RIC VIII Heraclea 89