Thelpusa, Arcadia. Circa 370-350 BC. AR Obol (0.71 g, 8h). 

Head of Demeter Erinys right; Theta beneath chin.
ERIWN. The horse Areion prancing right; Theta below. 

BCD Peloponnesos 1757 (same dies). 
VF, toned, light porosity. Very rare. 
Ex BCD Collection (not in LHS sale). 
Estimate: 750 USD.

With permission of cngcoins.com, May 2009.