Definition

• Partial Collar Strike.  A striking error where a planchet does not enter completely into coining position and is struck partially within the collar and partially outside; what collectors call a railroad rim. The edge may be evenly divided, half with reeding (or the smooth surface of the collar aperture) and half without. That portion that did
  not enter the collar will have the wider diameter.
  Reference:                                                                                                                             
  NM19 {1991} Margolis, p 249-254.

  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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