Watch List notes:

COINS OF THE GREEK WORLD. THRACE. Byzantion. Tetradrachm c. 387/6-340 BC. ΠΥ Bull standing on dolphin left, right foreleg raised; below foreleg, monogram. Rv. Quadripartite incuse square with stippled quarters. 14.93 g. BMC 12. Flan defects. Very fine.
(~€ 350/USD 405)
NGC Ch XF, Strike 4/5, Surface 4/5.