CNG - Macedon, Potidaia. Tetrobol. Poseidon Item #513717586 Currently $160.50 First bid $1.00 Ended Dec-06-2000 Seller cngcoins Description Macedon, Potidaia. Circa 500-480 BC. AR Tetrobol (2.75 gm). Poseidon Hippios on horseback, wielding trident Archaic head of Artemis(?) within incuse square. SNG ANS 693. VF, rough and porous. Rare. 723195