定義

• Proof Die.  A normal working die is highly polished and treated to produce a mirror finish when struck on specially prepared polished blanks.  See proof finish..

  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

人际关系