Psophis, Arkadia, AR obol, 10 mm, 0.89 g. 470-440 BC. 

Keryneian hind standing right.
Psi O, Fish left in incuse square. 

BCD Peloponnesos 1675; Hoover HGC 1009. 

With permission of cngcoins.com, Auction 94, Lot 392, Sept 2013.