Watch List notes:

Macedonian Kingdom. Alexander III, the Great. Silver Tetradrachm (16.7g), 336-323 BC. Contemporary imitation. Copying Babylon, ca. 323-317 BC, or slightly later. Head of Herakles right, wearing lion's skin headdress. Reverse: AΛEΧANΔPOY (N retrograde), Zeus seated left, holding eagle and scepter; in left field, wheel. Price -, but cf. under Philip III P187-202; Hersh -. Untoned. Very Fine.
The peculiar style, slightly low weight, and retrograde N in the legend all point to this coin be an unofficial issue rather than a unique variety in the name of Alexander. Estimated Value $400 - 500