Perdikkas II, King of Macedonia, AR diobol, 454-413 BC. 0.96 g.

Bridled horse right, tethered to a ring.
Quadripartite incuse square. 

SNG Cop 482; SNG ANS 63; AMNG III 9 (as Alexander I).
 
With permission of CNG, Triton IX, Lot 733, Jan 2006.

Ex Robert Weimer Collection. 
Estimate: $500.