Definition

• Off Metal.  A struck piece on a planchet of incorrect or unintended composition. It is sometimes called off strike; but more precisely called off metal strike, abbreviated OMS. But it has also been called off metal composition, abbreviated OMC.
  Reference:                                                                                                                                      
  NE42 {1982} Doty, p 238.

  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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