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Found A Really Beat Up 1947 D Penny Weights Only 2.7 Grams

 
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Author Previous TopicReplies: 9 / Views: 468Next Topic  
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 Posted 03/26/2020  03:27 am Show Profile   Bookmark this topic Add Lincoln8989 to your friends list Get a Link to this Message




Sorry about the image, photo shop gave up on it
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 Posted 03/26/2020  03:44 am  Show Profile   Bookmark this reply Add merclover to your friends list Get a Link to this Reply
Not sure there is a question here. This is a very well worn cent that has suffered extreme environmental conditions and will never be worth anything, although it will pass itself off as a penny upon close examination. It's low weight is within range of "normal" considering the wear and tear it has seen in it's life. Spend it (if you can). Might be better suited to end it's life in a fancy fountain somewhere as a wish.
ša va bien aller
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 Posted 03/26/2020  05:02 am  Show Profile   Bookmark this reply Add Lincoln8989 to your friends list Get a Link to this Reply
LOL thanks for making me laugh
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 Posted 03/26/2020  08:56 am  Show Profile   Bookmark this reply Add Coinfrog to your friends list Get a Link to this Reply
Agree, corrosion has eaten away at the weight of this coin.
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 Posted 03/26/2020  11:57 am  Show Profile   Bookmark this reply Add Vindex to your friends list Get a Link to this Reply
Does anyone know if there are any studies on the corrosion on coins. I have observed so many different alloy mixes and how they corrode. However my observations are only ancedotal.. I do know that corrosion will not alter the weight of a coin unless it is removed. For the coins weight to be normal we have to assume one half of a gram in weight removed by cleaning? I too will occasionally clean similar wheats enough to see the date. I weigh before and after and have not seen more than a few one hundreths of a gram weight loss. My conclusion is this coin was under weight when it was minted.
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 Posted 03/26/2020  12:01 pm  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
Well if anything is put into acid, it will not be the winner. The acid always wins. So we already know how that research would come out.
Richard S. Cooper
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 Posted 03/26/2020  1:41 pm  Show Profile   Bookmark this reply Add Vindex to your friends list Get a Link to this Reply
I will test that hypothesis that acid will reduce the gram weight of a coin by 15% (coin going from 3.11 to 2.65) testing a pre-82 copper based coin with a pre test weight of 3.11. I think it will be more like 1%
Specifically I am talking about a solution which take surface corrosion off of the coin.
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 Posted 03/26/2020  9:20 pm  Show Profile   Bookmark this reply Add merclover to your friends list Get a Link to this Reply

Quote:
My conclusion is this coin was under weight when it was minted.


I don't think this conclusion is correct. How do you know if all surfaces of this coin are still intact(without "cleaning")? We have no clue how long this cent was subject to harsh conditions. Copper doesn't easily corrode, however soils containing large quantities of organic matter (particularly soils containing organic acids) can be very corrosive to copper cents. As coop suggests, acid always wins, therefore your concluding this coin began underweight when minted is false. You do not have enough facts to reach your conclusion.
ša va bien aller
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 Posted 03/28/2020  11:11 pm  Show Profile   Bookmark this reply Add Vindex to your friends list Get a Link to this Reply
You are correct in that we do not have enough data for this specific coin. My point is that corrosion does not change the weight. It can add to the weight. It is removing the oxidation that changes the weight. I am saying that it will typically only change the weight by 1 to 2% by cleaning. Also let me state clearly that removing any amount of a coins metal by cleaning lowers its value.
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 Posted 03/29/2020  03:32 am  Show Profile   Bookmark this reply Add merclover to your friends list Get a Link to this Reply
If a copper cent has been buried in soil that has been fertilized (not uncommon), nitric acid is produced. Nitric acid serves as an oxidizing agent to copper. Over the span of over 70 years, it is impossible to tell the amount of actual wear vs acidic oxidization the coin may have received, but an overall final weight of 2.7 grams does not seem unreasonable for a coin in this poor condition. A pre-82 U.S. copper cent weight tolerance range can be +/- .31 grams (1%), so a .1 loss due to oxidation isn't crazy.

To quote coop (again),
Quote:
"The acid always wins."


ša va bien aller
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