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Pillar of the Community
United States
676 Posts |
https://www.error-ref.com/machine-p...impingement/I saw a thread recently that had a link to machine part impingement or one of the closely related errors and that prompted me to look at this nickel a bit closer because I had always sort of wondered what that flat spot opposite the strike was from. The planchet is a bit bent as if pressed against something when it was struck. Thoughts? Thank you!  
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Moderator
 United States
15400 Posts |
Interesting read in the link you provided, thank you for that reference. I don't have the expertise to address your question, but can say that your choice of photo background is confusing. There appears to be a circular metallic object that this partly struck nickel is sitting upon. Is that a separate item? Or is that part of the coin somehow?  Or is it a photo through the plastic lens of a 2x2? Whatever - it is visually distracting. It would be much clearer if you simply showed the coin against a neutral color background - at least to my eye. Edited by nickelsearcher
02/05/2026 06:43 am
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Moderator
United States
95324 Posts |
interesting read in the link provided, but I'm not sure that is what happened here, It looks like the planchet was partially in the striking chamber and the die pushed the struck part into the collar area and off setting the planchet.
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Moderator
United States
187950 Posts |
Very interesting.  |
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Bedrock of the Community
United States
73874 Posts |
Interesting error coin. Errers and Varietys.
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Pillar of the Community
 United States
676 Posts |
Sorry nickelsearcher, yes it is in a 2x2. It didn't help that I grabbed a shiny binder for my background, which I don't usually use that binder. I know coins should be removed from 2x2's but I was given this one as a gift so I would prefer to keep it in its original 2x2.  |
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Pillar of the Community
United States
7509 Posts |
Nice off center, I do not believe yours is a Machine Part Impingement.
Definition: This error occurs when a coin is pinned and pinched between two machine parts during the strike.
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Pillar of the Community
United States
2734 Posts |
The edge of the planchet opposite the off-center strike is flattened. This is seen in some off-center nickels and appears to be a form of intra-strike damage. Either the edge of the planchet is forced into an obstruction by the expanding struck tab, or an object is colliding with the edge of the planchet while the struck tab is pinned between the dies. This form of intra-strike damage appears to be restricted to nickels. It always appears at the pole opposite the base of Jefferson's bust. While it could be damage from a feeder/ejector, the nature of the object is a matter of speculation.
Error coin writer and researcher.
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Pillar of the Community
United States
676 Posts |
Thank you Mike! Makes sense, I will add that to the 2x2, which is kind of why I asked about this one. Your insight is much appreciated.  |
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Pillar of the Community
United States
2734 Posts |
Actually, I now recall at least one Lincoln Cent with this kind of intra-strike damage. But it remains primarily a 5c phenomenon. I should also note that the flattening can be seen in some double-struck nickels, where the second strike is well off-center. The off-center strike is always around 70-80% off-center, whatever that might mean. Here's an example from my collection. I have several others.  Error coin writer and researcher.
Edited by mikediamond
02/06/2026 3:13 pm
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Moderator
United States
187950 Posts |
Thank you for sharing the information, Mike D. |
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Replies: 10 / Views: 393 |
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Posted 02/05/2026 07:14 am
Uncirculated American Silver Eagles 
