Watch List notes:

THRACE. Byzantion. Circa 387/6-340 BC. Tetradrachm (Silver, 24 mm, 15.35 g), Rhodian standard. ΠΥ Bull standing left on dolphin left; to left, monogram. Rev. Quadripartite incuse square with stippled quarters. HGC 3.2, 1386. Schönert-Geiss, Byzantion, 693-697 . SNG BM Black Sea 7. Rare with this monogram. Struck from a somewhat worn obverse die, otherwise, good very fine.