Athens, Attica, ca AD 264-267. AE21, 6.52 g. 

Helmeted head of Athena right.
AQHNAIWN, , Athena standing left, holding spear, shield. 

Kroll Agora 318; Svoronos pl. 86, 6-12. Lindgren I 1551. 

With permission of CNG, Classical Numismatic Revue, April 2015, item 997994.

This image replaces the previous image from CNG which was 
from CNG (as historicalcoins.com) Auction 7, Web Product ID: 
765 which was sold for $51.70.