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 Replies: 10 / Views: 1,803 |
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Pillar of the Community
Canada
864 Posts |
Edited by Dottir
11/03/2010 11:36 pm
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Pillar of the Community
Canada
899 Posts |
Looks like post mint damage to me..
Reason: Usually directly across from the clip area of the coin there would not be a raised rim. (Appears to be a raised rim from the pictures..) This is known as the Blakesley effect and occurs when the upset mill encounters the cut out (clip) area on a blank. The raised rim is not created directly across from the missing metal area.
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Pillar of the Community
 Canada
864 Posts |
Thanks for your feedback D. I do feel a bit unclear about what you mean about the rim though. I'm trying to picture in my head what you mean and having a hard time conjuring up an image  I will google a bit about clipped coins to look for example images though. For the record, for anyone not familiar with our Canadian cents, this year I show is one of our 12 sided cents. All one cents were 12 sided and were minted from 1982 through 1996 I think, at which point they reverted back to the round design, as before 1982. |
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Pillar of the Community
Canada
864 Posts |
The outer areas before the clipped part does look more scraped or abraded than a clean cut, as I imagine clips propably look though. Do clips look like clean cuts?
My coin looks abraded and the rest of the collar, going round is very strange, crimped or something. I don't know how the mint created the 12 sides though, whether they are crimped onto the coin or how they do sided collars, so I'm sorry I'm not sure how to describe things.
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Pillar of the Community
Canada
899 Posts |
Here are a few picture from an error book that may help explain, and a link to the coin making process. http://www.usmint.gov/faqs/circulat...on=upsetting1st picture is of a blank with clip and I marked the areas, 2nd shows the different types of clips and 3rd is of a 25 cent with clip, notice the area directly across from the clip as the rim is either gone or flattened...If you do a search you will probably find a better site that shows the complete minting process..Hopes this helps some.. Most clips have a very clean cut with the exception of the raged clip at the end of the sheet..    Edited by D
11/04/2010 03:31 am
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Pillar of the Community
Canada
864 Posts |
Wow! Thanks a lot for the link, which I visited and browsed the processes. Thats a good link for short and sweet basics for newbies :)
The images you posted helps me to see what you're talking about regards the "effected opposite side from the clip too"
My coin, the clipped part and either side of it, definately looks like it was more like filed than clipped then. And the odd impressions and depressions, marks and crimplike marks, all around the edges of the collar looks like some kind of vise like thing may have gripped the coin collar while it was filed. This sound about right as a guess to what may have happened to it then?
I can't think of a vise grip that would leave those various odd shaped marks on the collar though, or explain why the obverse and reverse would be left unmarked if held in some kind of vise. Very weird.
I do go on, I know, but I would like to be able to learn to recognize different kinds of effects and damage types, which also helps to spot real mint errors easier.
Thanks a lot for the info D!
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Valued Member
Canada
311 Posts |
Dottir, here is a possible explanation. From an old retired HD mechanic, when we had to put something in a vise, and did not want any marks on one or both sides, we would use a piece of flat metal between the object and vise jaws so no damage would come to the piece. That might help explain why there are no marks on the one side.
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Pillar of the Community
Canada
864 Posts |
Thanks for that little mechanics trick idea :)
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Pillar of the Community
United States
1571 Posts |
HI all! I agree with D's info posted, and wouls also mention that if it were a :clip", the edges on both faces would have a little doifferent appearance, that is shown here. It obviously is PMD, maybe someone wanted to check to see it the "blade was sharp enough to cut a coin, rather than the sheet metal it was designed for. |
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Pillar of the Community
Canada
864 Posts |
Thanks a lot to all of you for explaining how its a PMD to me. If the obverse and reverse faces weren't so unaffected, I would have assumed PMDright away too. Their good faces threw me off and I had to get feedback. Thanks again :) |
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Pillar of the Community
Canada
864 Posts |
I have another of these 12 sided cents where the collar areas look strangely pushed outward and am not sure if this was a minting issue either. Its mixed in with my coins somewhere and when I find it I'll scan it and post it too. It resembles, a bit, some errors effects I've seen in error coins sites and I'm not sure about it.
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Replies: 10 / Views: 1,803 |
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Posted 11/04/2010 01:41 am
