CNG Auction 23 Lot Number: 61649 AR Tetrobol SNG ANS 692 Macedon, Potidaia. Circa 500-480 BC. AR Tetrobol (2.74 gm). Poseidon Hippios on horseback right, holding trident; star below / Archaic female head right within linear incuse square. SNG ANS 692. Rare. Estimate $200. Used by permission of CNG, www.historicalcoins.com