piefort

A coin deliberately struck on an unusually thick blank, often as a collector's or commemorative piece rather than for general circulation.

piefort

A piece struck on a planchet twice or more the normal thickness. The French spelling used in Europe is piedfort.
Found on http://www.encyclo.co.uk/local/10143

Piefort

A piece struck on a planchet twice or more the normal thickness. The French spelling used in Europe is piedfort.
Found on http://en.wikipedia.org/wiki/Glossary_of_numismatics
No exact match found