Ptolemy I, Soter, 323-283 BC. Alexandria mint, AR tetradrachm, 27mm. 13.96 gr.

Diademed head right.
PTOLEMAIOU BASILEWS, eagle standing left on thunderbolt, 
P over MHA monogram in left field.

SNG Cop. 74; Svoronos 254; Klein 779 (this coin)

With permission of Roland Müller. Coin added April 2013.