Haliartos, Boeotia, ca. 400-375 BC. AR stater, 21 mm, 11.82 gr. 

Boiotian shield decorated with upright trident. 
ARI-AR-T-I-ON, Poseidon advancing right, extending hand and 
brandishing trident, within concave circle. 

BCD Boeotia 164; BMC 11; Traité III 296. 
Rare. 

Ex BCD Collection
with permission of cngcoins.com
Auction 72, June 2006, lot 575.