Uncertain mint in Asia Minor, AE18.

Obv: Head of Herakles right, wearing lionskin.
Rev: EN monogram between bow to left, arrow-head pointing 
downwards to right, aphlaston above and caduceus at centre right. 

Imhoof KM p.529, 7; [cf Imhoof Monnaies Grecques, p. 467, nos. 47-48 (without caduceus).]

Note: Imhoof concluded that, because of a similar example with 
a ship's prow, and this one with an aphlaston, the coins come from a coastal town whose name begins with EN but which is still unknown today.

With kind permission of www.edgarlowen.com, Nov. 2011.