Lang, M. and M. Crosby (1964). The Athenian Agora X: Weights, Measures and Tokens. Princeton, New Jersey, The American School of Classical Studies at Athens. (https://zenon.dainst.org/Record/000211771)
IOVI-DIOCLETIANO AVG: Radiate bust of Diocletian l. with the mantle of Jupiter on his l. shoulder and his r. arm, holding a scepter in his raised r. hand
Reverse
VOT-A PVBLICA: Neptune standing r., l. foot on a prow, holding a trident in his r. hand and a dolphin in his l., facing Isis who stands facing him, wearing a basileion, holding a sistrum in her r. hand and a situla in her l.