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 Replies: 13 / Views: 856 |
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New Member
United States
5 Posts |
There are multiple horizontally raised anomalies on Lincoln's shirt and face on this 2020-P Lincoln Cent. There is one on his nose and another from his eye. There are four or five on his shirt and one near the rim, far below "LIBERTY". I have two questions: 1) Are these anomalies caused by an abrasion on the die or from the die breaking? 2) When does such an anomaly rise to the level of being included in error reference books/guides? (e.g. "speared bison", extra leaf Wisconsin quarter, etc.) Thanks for your help in advance! This is my first post on the forum, so hopefully I posted enough detail and followed the etiquette.  |
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Bedrock of the Community
United States
19173 Posts |
Given the single photo posted, I believe I'm seeing a few linear plating bubbles (across the nose, below the first 20 in 2020, etc.). Others will be along to comment.
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Moderator
 United States
188770 Posts |
 to the Community! |
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Pillar of the Community
Canada
6244 Posts |
I will answer you only to the second point.
Error are those who occur sporadic, means small quantity or once. In this category we have two main: 1. Planchet 26 types and 2. Striking 21 types
Then we have variety which mean during the mint process could be produced in higher number and has frequency. Those are in the category Die Varieties 18 types.
Are many books around but none very complex due to the fact that any day could be find other new, almost in the category of the variety, so better consult credit web sites and never look on YouTube junk.
Hope it is useful.
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Moderator
United States
56855 Posts |
.I agree with linear trail gas bubbles. They are a plating issue not an error or variety. Quote:
(e.g. "speared bison", extra leaf Wisconsin quarter, etc.) are varieties. John1  Edited by John1
12/29/2021 7:53 pm
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New Member
 United States
5 Posts |
Thanks everyone for the replies. This is very helpful. I haven't heard of linear trail gas bubbles before, so I'll definitely research that. To make sure I understand, would that be considered a lamination issue with the planchet? Does it occur after being struck?
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Bedrock of the Community
United States
10635 Posts |
As John1 said, it's a plating issue. This is after the coin was struck. It's not a plachet issue, nor a lamination issue, the issue is in the plating of the cent.  |
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Pillar of the Community
Canada
6244 Posts |
Like John say it is not error or variety.
This effect could come out next to plating, during the strike or any time after left the mint. Those has no error or variety factor. The last theorem for this stipule that EMF could affect and produce. (hypothesis) to be confirmed.
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Moderator
United States
96595 Posts |
Coins minted after 1982 won't have lamination issues as these coins are electro plated with a very thin layer of copper over a zinc core. If the zinc is not cleaned properly before plating, the bubbles can occur as the copper does not adhere to the core well.
I am wondering: did you take that picture under your lit Christmas tree?
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Pillar of the Community
Canada
6244 Posts |
Quote:
these coins are electro plated with a very thin layer of copper over a zinc core. If the zinc is not cleaned properly before plating, the bubbles can occur as the copper does not adhere to the core well. Agree with this. And because it is electro-plated the unconfirmed EMF theorem still in place from three years. |
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New Member
United States
5 Posts |
Ok, I think I understand now. The modern process is that the coin is struck on a zinc planchet and then is electro-plated with copper. This issue occurs during that plating process which is why the bubbles are raised. Thanks everyone for your input.
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Bedrock of the Community
United States
62064 Posts |
Probably be seeing this more using the incuse devices on the ATB Quarters, squashed into coins. The incuse mark will leave a raised area on the coins, but everything will be mirrored. (Another way coins could be altered with raised devices) |
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Moderator
United States
56855 Posts |
The planchet is plated before the striking of the coin. John1 |
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Valued Member
United States
426 Posts |
Quote:
Error are those who occur sporadic, means small quantity or once. In this category we have two main: 1. Planchet 26 types and 2. Striking 21 types
Then we have variety which mean during the mint process could be produced in higher number and has frequency. Those are in the category Die Varieties 18 types. Could you elaborate on types. I'm interested in what that means. And for doubled dies 18 types I know we have the class 1-9 doubled dies. |
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Replies: 13 / Views: 856 |
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Posted 12/29/2021 5:16 pm
