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All Forums Category: US Coins and Currency Forums Forum: US Modern Variety and Error Coins

2017 P District Of Columbia 25c ATB Reverse Reeding Exposed

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Chavez
Valued Member

United States
252 Posts
 Posted 05/29/2018  1:34 pm Show Profile   Bookmark this topic Add Chavez to your friends list Get a Link to this Message Number of Subscribers
Noticed a strange reeding effect On the reverse of this coin. Wondering if this is common or not.


2017-P-District-Of-Columbia-25c-ATB-Reverse-Reeding-Exposed
2017-P-District-Of-Columbia-25c-ATB-Reverse-Reeding-Exposed
2017-P-District-Of-Columbia-25c-ATB-Reverse-Reeding-Exposed
Errers and Varietys
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United States
74846 Posts
 Posted 05/29/2018  2:00 pm  Show Profile   Bookmark this reply Add Errers and Varietys to your friends list Get a Link to this Reply
It looks like a Collar Clash. From error-ref.com:


Quote:
A collar clash represents damage to the rim gutter of the die from contact with the collar. It shows up most clearly in reeded issues, where it takes the form of serrations along the top or the edge of the design rim. In an off-center strike, a collar clash will appear in the form of parallel grooves in the "slide zone".

Collar clash is far more common on the hammer die. It occurs when a temporarily misaligned hammer die collides with the top of the collar and/or scrapes along its working face.

When collar clash occurs on the anvil die, it is probably from a repeated up-and-down scraping action of the die neck against the working face of the collar. However, a sharp sideways impact that drives the die neck into the collar's
working face could also produce this pattern of serrations.
Errers and Varietys.
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