Lingones tribe of Gaul lived near the Marne river.  Andematunnum was their capital  (present day Langres in France).
 

Silver coin of Lingones tribe.  c 75 BCE
Obverse: Bust.
Reverse: Celtic representation of a horse.
 Weight: ~ 1.7 grams.
Reference: De La Tour 9025.  BMC 417.