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 Replies: 14 / Views: 4,226 |
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Valued Member
United States
242 Posts |
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Pillar of the Community
United States
3237 Posts |
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Bedrock of the Community
United States
73628 Posts |
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Valued Member
 United States
139 Posts |
I think it's a platting error. Some are calling it, "Plating Disturbance Doubling" or "Disturbed Plating Doubling". Basically the copper patting is thin enough to bubble. I wonder if it's a progression of thinner and thinner platting from this, which is thin enough to bubble, to an even thinner plate which splits and bubbles? There's a nice description on Errorsref.com and in a Mike Diamond CoinWorld article https://www.error-ref.com/other-forms-of-doubling/https://www.coinworld.com/news/us-c...plating.htmlFrom the 2011 article, "Puffy, raised doubling extends in a radial fashion from the normal raised design elements on the faces of both sides." "These final three examples with raised doubling show no evidence of a double strike. They're clearly not doubled dies. Nor do they represent a Type II counterclash (a form of die damage). The doubling doesn't seem to be related to Die Deterioration since none of the coins show evidence of a late die state or any other signs of Die Deterioration. The only possibility remaining is some form of disturbance in the copper plating. The areas that show this raised doubling are the same areas that often display split-line doubling. The copper plating is highly stressed during the strike, especially at the borders of raised design elements. Tensile stresses, compressive stresses, friction and heat all assault the thin copper plating. This could conceivably cause the copper plating to lift up from the underlying zinc or otherwise alter its appearance. I think the name "disturbed plating doubling" or "plating disturbance doubling" would be an appropriate moniker for this phenomenon." Edited by CentR
02/05/2024 03:50 am
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Bedrock of the Community
United States
73628 Posts |
I think you're correct, CentR. It sure looks like it. I've should of done my research before submitting my reply.
Errers and Varietys.
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Moderator
United States
56855 Posts |
I agree with CentR and would keep it in a 2x2. John1  |
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Moderator
United States
34393 Posts |
I don't have anything to add about the coin, but did want to compliment you on taking really nice close-up images @ted. Well done!
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
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Moderator
United States
56855 Posts |
TedError, What is your photo set-up? John1 |
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Pillar of the Community
United States
4135 Posts |
That was great research that you did and I did learn something new from it. Thank you. Your effort has been well recognized.
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Bedrock of the Community
United States
94367 Posts |
@CentR's comments are most informative.
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Valued Member
 United States
242 Posts |
@CentR - Thanks so much for that information. When I looked at this coin I wanted it to be something other than MD and DDD because it is a coin that I love and was going to keep no matter what doubling. To me it looks like Lincoln on the Obverse and the Building on Reverse were dropped in thick mud or melted metal and a small splash occurred around the edges. The coin itself is in very fine condition so I may send it off to get graded. Thanks for all of the comments. @John1 - I took the full coin photos with my iphone. The close up pictures were taken from my Moysuwe microscope which is connected to my laptop. I had to play with the lighting on each of the close ups to get the full definition of the error. |
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Pillar of the Community
United States
3535 Posts |
"Plating Disturbance Doubling"
That's a new term to add to my list!
..and this coin is a fine example of PDP.
Note: when & if those areas of extreme bubbling do break open, then it would become
"Split Plating" ?
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Moderator
United States
56855 Posts |
The plating splits during strike.See the gray areas by the letters. http://goccf.com/t/357614 The OPs coin is not split copper plating. John1 |
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Pillar of the Community
United States
3535 Posts |
Ok thanks for clarification John.
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Moderator
United States
94728 Posts |
yep plating issues for sure, possibly combined with DDD. |
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Replies: 14 / Views: 4,226 |
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Posted 02/04/2024 11:34 pm
