Watch List notes:

Antoninus Pius (138-161), Tetradrachm, Egypt: Alexandria, AD 141-142; BI (g 13,20; mm 23; h 12); [AVT K T AIΛ] AΔP - ANTΩNINOC, laureate and cuirassed bust r., Rv. Poseidon standing r., foot on prow, holding trident and dolphin; in field, L - ε. cfr. Dattari 2322; Emmett 1421.
Good very fine.