Lysimachus, AR tetradrachm, 29mm, 16.90 g. Perinthos mint. ca 283-282 BC. 

Diademed head of deified Alexander right, with horn of Ammon.
BASILEWS LUSIMACOU, Athena seated right, holding Nike in her 
extended right hand and left resting on shield, spear 
leaning against the chair back. Two conjoined foreparts
of horses back to back RA monogram in left field.

Thompson 256; Armenak hoard 945. 

With permission of Numismatik Lanz, Nov. 2008