Potin

Potin of the Remi, a Gallo-Belgic people: crosslegged figure holding a torc on the obverse, with a boar, a serpent, and two stars on the reverse

In numismatics, potin is a base metal alloy used in coins. It is typically a mixture of copper, tin and lead (in varying proportions) and does not typically contain significant precious metals. Potin is usually used in reference to Celtic and Ancient Indian coinage.