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 Replies: 21 / Views: 6,190 |
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Bedrock of the Community
Australia
21788 Posts |
First of all, welcome to this Forum.
I also have been collecting error coins for a long time, including ancients. To be honest, there one or two coins in my collection that I cannot explain.
My humble guess for this one is that it went through the milling dies vertically, not horizontally. That explains why there is milling on one face only, and why the milling goes straight across a segmental edge.
I have never seen this type of error before, and that is why I only estimate my answer as a guess. I stand to be corrected.
If my guess is correct, small wonder that it would be rare.
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Rest in Peace
United States
1943 Posts |
SEL, what are milling dies? I am not familiar with them. I have to admit, I made my diagnosis above using my knowledge of the US minting process. In the US the reeding is applied with collar around the planchet right when the coin is struck. It is not a separate operation. Does Sweden mint their own coins and do they use the same minting procedure used in the US?
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Bedrock of the Community
Australia
21788 Posts |
pyrbob: One of the methods of putting the milling on the edge of a coin is to roll is to have the coin flat and roll it between two straight edges which have the edge milling incuse on them. The two straight edges are apart by only a tiny fraction less than the diameter of the coin, and travel in opposite directions to each other, with the blank in between.
My guess, and it is only that, is that for some reason two blanks have become between the straight edge dies with one coin vertical and one in the normal flat position. My guess is dependent on the fact that the milling needs to be done in this manner. It must be remembered that there are many other ways of putting milling on the edge of a coin.
If someone else can come up with a better answer, I am all ears! (as well as eyes).
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New Member
 Sweden
14 Posts |
I am pretty convinced this is a real error coin and not a PMD. The coin is perfectly round and the edge reeding is not damaged. As DVCollector said it is made of CuNi and afaik the reeding is made in collar when the coin is struck. I think sel_69l is on to something here. In a swedish book about the minting process it says that the 1Kr 1968-1971 the edge of the blank was turned (do not know if this is the right term) to a smaller diameter. This was made because the blank was made of a cupper core surrounded by two CuNi layers. Then the edge of the blank was folded to hide the cupper core. I also have to say that a couple of weeks ago I found another one, but from 1969. These two, and one more, are the only known coins with this kind of error in Sweden. One interesting thing about this ยด69 is that the reeding is on the other side of the coin.   I apologize for the bad picture quality. It is taken through plastic. |
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Rest in Peace
United States
1943 Posts |
SEL, thank you. That is what I thought you were talking about but I wanted to be sure. I thought this method of applying the reeding on the edge was replaced by more current methods long ago. But maybe some countries still use it. Dimma, thanks for posting this coin. I'm not convinced yet this is an error but it shows me that I need to look at the minting processes in other countries to help me recognize errors that I wouldn't expect to see on US coinage. I wonder where I can find information on Swedish minting methods? |
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New Member
Sweden
14 Posts |
Information on Swedish minting methods is unfortunately very hard to get, if it even exists. The mint has never allowed anyone to make a study visit.
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Bedrock of the Community
United States
10045 Posts |
Quote:it shows me that I need to look at the minting processes in other countries to help me recognize errors that I wouldn't expect to see on US coinage. That's a very good point. We would need to know how the milled edge is applied to better understand what happened. Now that I know the coin is perfectly round, I'm more hopeful this happened at the mint--but I cannot guess how it happened.  |
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Pillar of the Community
Canada
693 Posts |
Does the reeding on the face of the coin match the reeding on the edge of the coin? I'd be more convinced it's an authentic Mint error if they meshed.
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Rest in Peace
United States
1943 Posts |
Scissel, keep in mind most of time this is caused by one coin being pressed into and rolling across another coin post mint. So the reeding matching the coin would be expected on an error coin and on a post mint damaged coin.
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New Member
Sweden
14 Posts |
If you look at the opposite side of the reeding there is no damage but a thin line. Should not the entire opposite be mashed if it was a PMD? |
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Pillar of the Community
United States
1424 Posts |
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New Member
Sweden
14 Posts |
Do you guys think there is anyone, maybe in another section of this forum, that can explain this? Or are you the most experienced regarding errors? Do not take this the wrong way. I really appreciate the help I have got so far.
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Pillar of the Community
United States
1840 Posts |
Try shooting a PM to coop. He always gives competent answers in the US error coin forum.
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Bedrock of the Community
United States
10045 Posts |
Quote:
Do you guys think there is anyone, maybe in another section of this forum, that can explain this? We have some really helpful experts here, but as you say most will give qualified guesses without knowing exactly how this coin was minted. I mostly collect older coins of Scandinavia, but I've never seen an error like this--but I'll keep looking. |
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New Member
Sweden
14 Posts |
Can somebody please notify them on this topic? I do not have enough posts on this forum to send PM/email. Thanks.
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Replies: 21 / Views: 6,190 |
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First Page
Posted 10/23/2010 12:30 pm
