142.  Potidaia .  Circa 525-500  BC.  AR Tetradrachm  (17.04 gm).  

Poseidon Hippios  on horseback  right,  holding trident
Incuse  square diagonally divided. 

SNG ANS 687. 

Toned VF, nice flan. Extremely rare.($1000)

CNG Mail bid sale #58, lot 142.
 
Lot sold for $650.

Used by permission of CNG, www.historicalcoins.com