定義

• Back Die.  A force; a male or positive die (similar to a hub) used for striking into a female striking die of the same design. Back dies are used to strike thin gauge metal into shells.  See force

  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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