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Knife Edge, Knife Rim

Knife Edge, Knife Rim.  A burr or fin where metal flows between the die and the collar in a coining press where the pressure is too great, or the blank is too large. These are British terms for what Americans would call a wire edge. The fin is thin and sharp like a knife hence the name.  See burr, fin; compare flash.

excerpted with permission from

An Encyclopedia of Coin and Medal Technology

For Artists, Makers, Collectors and Curators

COMPILED AND WRITTEN BY D. WAYNE JOHNSON

Roger W. Burdette, Editor


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