Lycia, Uncertain Dynast (c.525-480 B.C.), AR Stater, 9.48g. 

Forepart of  a winged boar to left, FO[I] 
below. 
Patterned incuse square, divided into eight irregular segments resembling the form of a Maltese cross.
SNG Keckman 425; SNG von Aulock 4048; Vismara II, 45; Prospero XIII, 565.

From the Prospero collection, Part XIII, Baldwins Auction 27.