Peter Kershaw is making a film about the Cragg Vale Coiners of West Yorkshire, and is hoping that some of their descendants will come forward to help.
Mr Kershaw said: "We want people who descend from the coiners or who have just grown up with the story."
The Coiners were a band of counterfeiters based in Cragg Vale.
In the late 18th century they clipped the edges of gold coins and milled them again, melting them down to produce fakes to supplement their small weaving incomes. [Link]