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 Replies: 14 / Views: 5,939 |
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Valued Member
United States
127 Posts |
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Moderator
 United States
56855 Posts |
I think it is called a Rim Fin. Caused by higher than normal minting pressure. John1  |
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Bedrock of the Community
United States
62064 Posts |
Here is a description from the err-var.com site: http://www.error-ref.com/?s=finningQuote:
Finning
Definition: A fin is a thin flange that extends vertically from the rim/edge junction of a coin struck within the collar. It is caused by excessive striking pressure or a localized increase in striking pressure caused by slight die tilt. The extra pressure causes coin metal to squeeze into the narrow gap between die neck and collar. Fins can develop on either face or both faces simultaneously. A fin may encircle a coin or may be restricted to one pole. The latter is the kind typically produced by die tilt. |
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Bedrock of the Community
United States
94367 Posts |
Coop has explained this many times in the past, but it is always good to refresh the memory.
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Bedrock of the Community
United States
11951 Posts |
I have seen coins like this ...
First time I read what caused t ... nice write up
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Valued Member
 United States
127 Posts |
I have "finned" coins...but you can see there is no high fin...that is why I showed the pics of the rim on both sides
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Bedrock of the Community
United States
62064 Posts |
I could use better images on your coin with the ID added to it. But the sharpness is not there on your images. (if you are using a scope, focus that area in better) If you get better ones, post them to this thread and I will use them.
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Pillar of the Community
United States
3463 Posts |
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Pillar of the Community
United States
3331 Posts |
I am not seeing that the finning on this coin is contributing in any significant way to the variation of the coin's thickness. I have seen such variation on Lincoln Cents without finning, but not this extreme.
It doesn't seem to have the strike characteristics of a tapered planchet, either.
I'm with Claude - would find the weight interesting.
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Valued Member
United States
127 Posts |
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Pillar of the Community
United States
3463 Posts |
You can make a home made balance scale with a popsicle stick and compare it to the weight of a normal dime.
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Valued Member
United States
127 Posts |
Thanks cwb...mayb i'll give it a shot.
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Bedrock of the Community
United States
62064 Posts |
Well you are getting closer. I was hoping for a view from the inside of the coin towards the raised rim, showing the height.
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Valued Member
United States
127 Posts |
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Bedrock of the Community
United States
62064 Posts |
Thats it! Thanks.   |
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Replies: 14 / Views: 5,939 |
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Posted 11/12/2016 6:30 pm
