Andecavi
Andecavi is a celtic tribe  lived in Armorica. Their territory was on the northern bank of river Loire.
 
 

Silver Obole of Andecavi . c 80 - 50 BCE.
Observe: Stylized head.
Reverse:Stylized horse.
Weight: ~  0.35 grams. Size: ~ 11 mm.
Reference: LT.6463.