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.