Antigonos I Monophthalmos. Satrap of Asia, 323-305 BC. AR Drachm 18mm, 4.24 g. In the name and types of Alexander III. 
Kolophon mint. Struck ca 310-305 BC. 

Head of Herakles right, wearing lionskin headdress. 
ALEXANDROY, Zeus Aėtophoros seated left, right leg drawn back, holding eagle and sceptre. 
KA monogram in left field, PR monogram beneath throne. 

Price 1823 var (PR monogram not in Price etc for this issue).

Courtesy of Gerhard Hirsch Nachfolger, Auctions 262-263, lot 2231, May 2010

Note: this KA monogram form *on Drachms* was only used in 
Kolophon. But the form of the lionskin behind Herakles' ear 
confirms the style of Kolophon.