From ancientimports.com:

aVF/gF+ Aeolis Aegae AE18 / Athena

Attribution: BMC 12v, Cop. 7
Date: 2nd-1st cent. BC
Obverse: Helmeted head of Athena right, owl countermark on helmet
Reverse: Zeus advancing left, holding eagle and sceptre
Size: 18.01 mm
Weight: 7.9 grams
Description: A scarce bronze with nice counterstamp Ex Colosseum 1991

	
Price
  US$ 87.00 	 euro 59.34
 £ 44.47
 AUD$ 98.87
 CHF 97.02
 CAD$ 87.74
Rates for 1/9/2008