Ptolemaic Kings Of Egypt. Ptolemy I Soter AV pentadrachm. Alexandria mint. ca 305-285 BC. 17.86 g. 

Diademed head right, with aegis.
BASILEWS PTOLEMAIOY, Eagle, standing left on thunderbolt, wings closed. APM monogram in left field.

Svoronos 204; Sear 7757.

With permission of Numismatica Ars Classica auction 110, Lot 74, Sept. 2018.
Svoronos_204