Watch List notes:

Syracuse. Tetradrachm circa 450-440 BC, AR 17.06 g. Charioteer driving slow quadriga r.; above, Nike flying r., crowning horses. In exergue, sea monster r. Rev. Head of Arethusa r.; four dolphins around. Rizzo pl. XXXVIII, 13. Boehringer 579. SNG ANS 181 (this reverse die).
Light iridescent tone, insignificant area of porosity on obverse,
otherwise about extremely extremely fine

Ex CNG/NAC sale 40, 1996, 855.