Définition

• Pinhole.  Minute pit in the surface of a struck piece, caused by dirt on the die or planchet, impurities in the alloy, improper flow of metal, or other causes. Pinholes in coins are usually not reason for rejection during inspection: but medals with pinholes would be rejected and restruck or chased (depending upon the number of holes, location and their severity) prior to their being refinished and inspected again.

  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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