Wire edge July 21, 2022 by The BBS Agency An effect whereby a thin, wire-like section of the rim of a coin is raised above the rest of the rim along the outside. This effect is typically caused by very high striking pressure, and tends to occur mostly on proof and high relief strikings. Related Articles: Glossary: Flat edgeGlossary: Knife edgeGlossary: Wire Edge TenGlossary: Wire rim