Arkesine, Cyclades. AE17. Late 3rd-early 2nd c. BC.

Obv: Helmeted head of Athena right
Rev: Ram standing right. 

Liampi, Coinage, group I, 26b (O1/R1) = Weber 4617 (this coin); 

Ex Christopher Morcom Collection. Ex Weber Collection, 4617.

Estimate: $150

Used with permission of CNG (cngcoins.com), Sept. 2007