Roman Empire. Constantius II, 337-361 AD. AE Follis / Centenionalis, ca. 350 AD, Thessalonica mint, RIC 129, Bronze 23 mm, weight 5,63 g., condition VF, traces of silvering residue,  porous surface

D N CONSTANTIVS P F AVG, Pearl-diademed, draped, and cuirassed bust right, letter A in the left field.
FEL TEMP REPARATIO / TSΔ,  A warrior standing on the left, piercing with his spear a fallen horseman wearing a Phrygian cap, sitting on the right on the ground with his hands raised, letter A in the left field. Mint mark TSΔ at the bottom in the cut-off.