Watch List notes:

SICILY. Segesta. Circa 455-440 BC. Didrachm (Silver, 23 mm, 8.54 g, 10 h). Hunting dog standing to left, wearing a collar and with his tail curled up over his back. Rev. ΣΕΓΕΣΤΑΖΙ8 (retrograde) Diademed head of the nymph Aigeste to right, her hair bound up into a queue at the back and wearing a plain necklace. Buceti 11. Hurter 96b (V29/R52, this coin). Rare. Toned. Minor edge scuff on the obverse and minor edge split, otherwise, nearly extremely fine.
Ex Leu Numismatics 91, 10 May 1991, 86, Monnaies et Médailles 37, 5 December 1968, 86 and Hess-Leu [1] 14 April 1954, 56.

The head of Aigeste on this coin is directly based on the heads of Arethusa on the coin of Syracuse minted c. 455 BC: as AMB 437, Boehringer 514 ff., and Rizzo pl. XXXVII, 6-7.