The Perrhaebi, Thessaly. ca 480-400 BC. AR Obol, 0.7 g. 

Horse prancing left, trailing reins.
P-E-R-A, Athena running right, holding spear and shield. 

BMC 4; SNG Cop 195; Sear SG 2171; Philipsen 671b (this coin).

With permission of Numismatik Lanz München - Auction 151, Lot 66, June 2011.