EGYPT, Alexandria. Nero. AD 54-68. BI Tetradrachm (23mm, 13.14 g, 12h). Dated RY 13 (AD 66/67). Radiate bust left, wearing aegis; L IΓ (date) below chin / ΣEB[AΣTOΦ]OP[OΣ], corbita with helmsman under sail to right; [two dolphins in water]. Köln 186; Dattari (Savio) 264; K&G 14.99 corr. (obv. legend); RPC I 5296; Emmett 121.13. Toned, a few light marks. Near VF.
There appear to be two different varieties of this type – one with dolphins and one without. Most likely, it commemorates Nero's visit to Greece in AD 66-67.