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 Replies: 7 / Views: 1,100 |
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Valued Member
Canada
234 Posts |
This coin is not mine but was discussed on another forum (Facebook). So, for now this is the only pictures I have. I asked my friend if I can use his images to confirm with you the diagnostics. On this coin we can observe a doubling signature almost all around the King profile. The conclusion was a result of an over polishing, but I'm not really convince. I was almost alone in my camp, but I think it's a result of a Die Deterioration. I can't imagine how a polishing task can affect the Die in that way without affecting other sections of the device. That would require a very aggressive polishing step. My main references are: https://www.error-ref.com/design-berms/https://www.error-ref.com/abrasion-doubling/Thanks for sharing your thoughs.     Edited by SP67
04/07/2022 4:36 pm
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Bedrock of the Community
United States
94367 Posts |
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Valued Member
 Canada
234 Posts |
I'll see what I can do.
As I said, this is not my coin .
That could take few Days.
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Pillar of the Community
Canada
1186 Posts |
SP67, no need to get more photos.
What you are seeing really is over-polishing on the obverse die. Those areas are raised on the die and when they get polished too much they start to sink into the die like the rest of the portrait.
Once the die strikes a coin the areas become raised on the coin, I have a few examples of a 1964 Elizabeth nickel with the same form of over-polishing.
Finding and discovering modern Canadian doubled die varieties since 2018. 2023 Recent Publications: Modern Canadian Doubled Die Varieties - First Edition PDF & Paperback https://www.mcddv.ca (website currently down for maintenance as of 08/01/2024) |
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Moderator
 Canada
10458 Posts |
 overpolished die. Here is a more extreme example.  "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Valued Member
Canada
234 Posts |
OK. Fair enough ! I understand your points. I lost this one   But, if you will let me show you why I came to the Die Deterioration conclusion. My analysis was based on Error-ref, which is, as we know, THE reference. But I understand it's based on the US process and may not be applied at 100% on Canadian Mint coin. My goal is to improve my understanding of this error. Maybe I mix up few things  Ref 1: Design Burms https://www.error-ref.com/design-berms/The ref tells us that the Design burms is associated to the Die Deterioration. The last image of this link shows a Canadian 1 cent. In my opinion, the Queen's profile shows a doubling quite similar to the coin presented in this topic. Maybe Error-ref is wrong with this example. Ref 2: Abrasion doubling https://www.error-ref.com/abrasion-doubling/This reference mentions that abrasion doubling is a myth. Might be true in US, but I understand that this kind of error exists for Canadian coins. Thanks for your time! Edited by SP67
04/08/2022 08:24 am
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Pillar of the Community
 Canada
5586 Posts |
Here's another reference for you, which I accept more than yours. Many of the Canadian coins that show Vicky with a second, shelved or shadowed, face are misstated on here. Many of those are due to Mechanical/machine doubling when it is normally just on one side. http://doubleddie.com/144801.htmlEdited by okiecoiner
04/08/2022 11:32 am
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Pillar of the Community
Canada
1186 Posts |
This is not a form of doubling, Error-ref is an overall good site for the most part, but comparing 2 different world coins and hoping the minting process is the same is like comparing apples to carrots and hoping nobody notices, it just doesn't work. Why they are trying to compare a Canadian 1962 small cent featuring an over-polished die, with a 2017 United Kingdom 1 Pound showing clear signs of Die Deterioration I have no idea, but what I do know is you can't compare a 60 year old coin with a modern 5 year old coin, especially from 2 completely different countries, in the 60's the minting process is NOT comparable to any modern minting process, especially from 2017. Overall I don't use fancy words to make simple common anomalies look more appealing to unknowing collectors, as for the 2017 1 pound, call it for what it truly is, deterioration. But long story short and I got no issues calling it out, that error-ref page is 100% incorrect and misleading and that 1962 small cent is in the wrong class altogether. Finding and discovering modern Canadian doubled die varieties since 2018. 2023 Recent Publications: Modern Canadian Doubled Die Varieties - First Edition PDF & Paperback https://www.mcddv.ca (website currently down for maintenance as of 08/01/2024) |
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Replies: 7 / Views: 1,100 |
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Posted 04/07/2022 6:58 pm
