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Strange Error? (1998 P Half)

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United States
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 Posted 08/18/2014  2:33 pm Show Profile   Bookmark this topic Add half n a half to your friends list Get a Link to this Message
I was just about to spend this half when I noticed something strange with it and decided to keep it. It seems as if it has a foreign piece of metal embedded in the edge. Normally I would think PMD, but it seems to have reeding on it as well. I've never seen an error like this and would love to hear some opinions on what it might be. Too bad the coin it pretty thrashed, but interesting nonetheless.




Rest in Peace
United States
7075 Posts
 Posted 08/18/2014  3:45 pm  Show Profile   Bookmark this reply Add Buddy to your friends list Get a Link to this Reply
That is really strange.

Waiting to see what the experts aay....
Pillar of the Community
United States
4813 Posts
 Posted 08/18/2014  3:48 pm  Show Profile   Bookmark this reply Add Adam_E to your friends list Get a Link to this Reply
It looks like someone tried to dissolve the copper with acid, leaving a nickel shell. I'm not sure if that's even possible though, can you see how deep it goes?
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 Posted 08/18/2014  7:55 pm  Show Profile   Bookmark this reply Add mikediamond to your friends list Get a Link to this Reply
It looks like a foreign object that was present before the strike. Most likely it was squeezed into the edge of the blank as the latter passed through the upset mill. A very rare occurrence.

The object looks like it's very hard and resistant to wear. If possible, I'd like to inspect it up close and perhaps write it up for Coin World.
Error coin writer and researcher.
Edited by mikediamond
08/18/2014 7:58 pm
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United States
61062 Posts
 Posted 08/18/2014  8:03 pm  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
Thanks Mike. I knew you would like that one.
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United States
4813 Posts
 Posted 08/18/2014  8:15 pm  Show Profile   Bookmark this reply Add Adam_E to your friends list Get a Link to this Reply

Quote:
It looks like a foreign object that was present before the strike. Most likely it was squeezed into the edge of the blank as the latter passed through the upset mill. A very rare occurrence.


Oh wow! That's very interesting, I've never heard of something like that happening, do you have an idea of what kind of object could get into the die like that?
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 Posted 08/18/2014  9:46 pm  Show Profile   Bookmark this reply Add mikediamond to your friends list Get a Link to this Reply
If my speculation is correct, the object didn't enter the striking chamber. It arrived embedded in the planchet. So it makes no sense to ask, "what kind of object could get into the die like that". Identifying the origin of small embedded bits of metal is next to impossible in any context.
Error coin writer and researcher.
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 Posted 08/19/2014  12:07 am  Show Profile   Bookmark this reply Add biokemist6 to your friends list Get a Link to this Reply
Have you checked the inclusion with a magnet yet?
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 Posted 08/19/2014  12:14 am  Show Profile   Bookmark this reply Add Adam_E to your friends list Get a Link to this Reply
Ooh okay, I misunderstood, my apologies.
Valued Member
United States
364 Posts
 Posted 08/19/2014  02:27 am  Show Profile   Bookmark this reply Add half n a half to your friends list Get a Link to this Reply
Thanks for the replies, everyone. I just tried checking the piece with a magnet and it does stick. That explanation make sense, just never heard of an error like this. Exciting stuff!
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105 Posts
 Posted 08/19/2014  2:22 pm  Show Profile   Bookmark this reply Add Cindy Wood to your friends list Get a Link to this Reply
GREAT FIND !
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4897 Posts
 Posted 08/19/2014  2:28 pm  Show Profile   Bookmark this reply Add amida17 to your friends list Get a Link to this Reply

Quote:
I'd like to inspect it up close and perhaps write it up for Coin World.



Ummm...you are going to ake him up on this.....right?


Very nice find!
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 Posted 08/19/2014  3:38 pm  Show Profile   Bookmark this reply Add biokemist6 to your friends list Get a Link to this Reply
The fact that the inclusion is iron or steel makes it a much more interesting error than if it was just a hunk of copper or nickel alloy.
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United States
7075 Posts
 Posted 08/21/2014  6:38 pm  Show Profile   Bookmark this reply Add Buddy to your friends list Get a Link to this Reply
half n a half, I showed your photos to my husband ( a design engineer) and asked him to show the engineers and tool and die makers that he works with.

What I find most curious is what appears to be the space around the foreign object.

My questions: is it possible to move that object? And, is that really empty space I see or is that a shadow?

I don't know that we'll ever have an answer to this mystery but we're having a lot of fun trying to figure it out.
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United States
364 Posts
 Posted 08/21/2014  10:56 pm  Show Profile   Bookmark this reply Add half n a half to your friends list Get a Link to this Reply
It has been sent off to mikediamond, but the piece is definitely stuck and not movable. If I remember correctly there is a slight space on some side, but I'm not positive. Hopefully we'll have some answers from mike in a little bit.
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 Posted 08/22/2014  02:50 am  Show Profile   Bookmark this reply Add macmercury to your friends list Get a Link to this Reply
Can't wait to hear the good news from Mr. Diamond here and read about it in Coin World!

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