Watch List notes:

Macedonian Kingdom. Phillip II, 359-336 BC. Silver Tetradrachm (15.39g). Amphipolis mint, early posthumous issue. Head of Zeus laureate right. Reverse: Naked youth on horse prancing right holding long palm branch and reins; aplustre below; Γ under foreleg. Rider pl. 46, 18; SNG ANS 740. Boldly struck throughout and well centered, struck from well excuted dies. Lusterous and untoned. NGC graded AU*; Strike: 5/5, Surface: 5/5. Estimate Value $1,000 - 1,200
Reportedly, this is a commemorative issue on Philip's triumph at the Olympic games of 356 BC.