Celtic, Gaul. The Senones. Circa 100-50 BC. Potin unit
(3.37 gm). 

Helmeted head left.
Stylized horse, pellets around.

De la Tour 7388. 
Estimate: US$ 90.00  (€ 68.03)

Courtesy of imperialcoins.com on vauctions.com, Nov. 2011.