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Dimma
New Member
Sweden
13 Posts
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Hi.
This is my first post on this great forum. I´m from Sweden and have collected swedish error coins for about 20 years now.
A few years ago I found an error I can´t explain. It´s a 1 Krona from 1970. It has reeded edges and my coin also has reeding on the face of the coin.
Any ideas of what has happened?
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Pillar Of The Community
United States
3193 Posts |
im not sure what to call it(partial, out of collar?), bit IMO this is DEFINETLY an error.
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Pillar Of The Community
United States
1426 Posts |
The marks removed the rim on the side with the reeding and damaged the opposite side. It also looks like the coin is pushed out just a little bit at the reeding and is not perfectly round at this area. This is post mint damage and not an error.
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Pillar Of The Community
United States
3193 Posts |
how is the "reeding" on the obverse not affecting the letters?
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Pillar Of The Community
United States
790 Posts |
In my not very informed opinion, it looks like something that could be made post mint. That being said, who can tell for positive if it was created in or out of the mint.
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Pillar Of The Community
United States
1827 Posts |
I think it is post mint damage as well. You can see evidence of a raised rim between the reeding. To me this indicates that the coin was fully struck. Since there are corresponding marks to the reeding on the obverse, I going to assume this is some sort of vice job.
267 different coin issuing entities in my collection...and counting.
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Pillar Of The Community
7693 Posts |
That's interesting. CuNi is pretty hard, so it would take a lot of force to make that impression. I cannot tell if the coin is perfectly round like a normal 1Kr.  If it's not perfectly round, it probably was not struck in the press that way, because the collar should keep the coin round. |
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Pillar Of The Community
Australia
6471 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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Pillar Of The Community
United States
1426 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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Pillar Of The Community
Australia
6471 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
13 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 ´69 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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Pillar Of The Community
United States
1426 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
13 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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Pillar Of The Community
7693 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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Valued Member
Canada
208 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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Pillar Of The Community
United States
1426 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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Posted 10/22/2010 6:18 pm
