PART VI: Striking Errors

Counterbrockages:

Rebound Counterbrockage

Definition:  A counterbrockage produced during a third strike that closely overlaps flattened first-strike design elements.  The sequence of events begins when a struck coin and an unstruck planchet are both present in the striking chamber.  After a normal first strike, the coin is struck a second time with a planchet partly or completely covering one face.  This leaves an indent on the first coin whose floor is adorned by flattened first-strike design elements.  The intrusive planchet is converted into a broadstrike or off-center coin that has a first-strike brockage on one face.  After the second strike, the intrusive brockaged coin shifts position relative to the indented, double-struck coin.  The brockaged coin is driven back into the indent, with the brockaged elements acting as a “soft die”.  The brockaged elements generate a counterbrockage that overlaps the flattened first-strike elements.

This 2005 Pakistan 1 rupee coin received a normal first strike.  It was then struck a second time in a slightly off-center position while partly covered by an intrusive planchet.  This produced an indent in the bottom coin within which lay flattened first-strike elements that include Mohammed Jinnah’s neck and the date.  The overlapping planchet was converted into an off-center coin with a first-strike brockage of the obverse design on its reverse face.  After the second strike, both the double-struck coin and the brockaged off-center coin shifted toward the north, with the off-center coin lagging behind slightly.  The brockaged face of the off-center coin was driven back into the indent, producing a set of raised, counterbrockage elements that overlap the flattened first-strike elements.  In this photo, the counterbrockage date is located in an offset position south of the original date.

More information on this error can be found at this link:

http://www.coinworld.com/news/us-coins/2015/10/collectors-clearinghouse–several-ways-to-a-