Ptolemaic Kings Of Egypt. Ptolemy I Soter AV Third chryson or hemidrachm, Alexandria mint. ca 305-285 BC. 1.73 g. 

Diademed head right, with aegis.
BASILEWS PTOLEMAIOY, Eagle, standing left on thunderbolt, wings spread. A in left field.

Svoronos 182; BMC (Co-regency with Ptolemy II) 80-81; SNG Cop 44; CPE 134; Sear 7759.

With permission of Numismatica Ars Classica 114, Lot 1231, May 2019.