EGYPT, Alexandria. Nero. AD 54-68. BI Tetradrachm (24mm, 12.66 g, 12h). Dated RY 13 (AD 66/7). Radiate bust left, wearing aegis; L IΓ (date) below chin / ΣEBAΣTOΦOPOΣ, Corbita with helmsman under sail to right; two dolphins in water below. Köln 186; Dattari (Savio) 264; K&G 14.99 corr. (obv. legend); RPC I 5296; Emmett 121.13. Toned. VF.
There appear to be two different varieties of this type – one with dolphins and one without. The type most likely commemorates Nero's visit to Greece in AD 66-67.