Skepsis, Troas. AR diobol or triobol, 350-400 BC. 10mm, 1.61g. 

Forepart of winged horse leaping left.
Fir tree, S-K across lower fields, all within linear and dotted border. 

Apparently unpublished in this denomination. CNG 287, 141.

With permission of cngcoins.com, Sept. 2012