567.  Ephesos. Mid 6th Century BC. AR 1/24  Stater? (0.41 gm). 

Gorgoneion.
Irregular incuse.  

Cf. Aufhäuser 14, lot  144, otherwise unpublished. 

CNG Mail bid sale #58, 18 Sept 2001, lot 567.
 
Sold for $400.

Used by permission of CNG, www.historicalcoins.com
In "Emblems In Archaic Greece", Jeffrey Spier doubts the 
source of this and similar Gorgoneion coins as being
 Ephesos.

CNG_MB58_567