Counterfeit (fourrée) Didrachm from Velia, Lucania c. 290-275 BC

Head of Athena left, wearing crested Attic helmet adorned with a griffin; above visor, the letter A; behind neck guard, IE within square. On the reverse,  a lion pulling down a stag to left; YEΛHTΩN above right. 

A fourrée is a coin, most often a counterfeit, that is made from a base metal core that has been plated with a precious metal to look like its solid metal counterpart. The term is normally applied to ancient silver plated coins such as the Roman denarius and Greek drachma, but the term is also applied to other plated coins.