Watch List notes:

GREEK COINS
Macedon

Potidaia, c. 500-480 BC. Tetradrachm (Silver, 23mm, 17.13 g). Poseidon Hippios, nude, riding horse walking to right, holding trident with his right hand and the reins with his left; beneath horse, traces of a star. Rev. Incuse square divided diagonally. Asyut -. HPM -. SNG ANS 688-9 var. Very rare. Of unusually fine style for these crude issues. Some minor marks and scrapes, otherwise, nearly extremely fine.

Ex Nomos 6, 8 May 2012, 47 and from an English collection.