Roman Imperial
Diocletian (284-305 AD). Thessalonica
AE Follis (26mm 9.23g)
Obv: IMP C C VAL DIOCLETIANVS P F AVG, laureate bust right
Rev: GENIO POPVLI ROMANI, Genius standing, wearing modius, holding patera from which liquid flows and cornucopiae, mint mark TS between two dots in exergue and officina mark Δ in right field
(RIC vi, p. 512-13)