Macedonian Kingdom, Demetrius Poliorcetes AR Tetradrachm. Amphipolis, ca 291–290 BC. Diademed head of Demetrius right, with bull’s horn / <font face="SYMBOL">BASILEWS DEMET</font>PIOY, Poseidon seated left on rock, holding aphlaston in extended right hand & trident in left, sideways-<font face="SYMBOL">YPL</font>monogram in inner left field, <font face="SYMBOL">D</font>P monogram in inner right field.