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 Replies: 12 / Views: 5,826 |
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Valued Member
United States
493 Posts |
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Moderator
 United States
56855 Posts |
Looks like environmental damage not an error. John1  |
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Valued Member
 United States
493 Posts |
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Valued Member
United States
274 Posts |
I found a similar one a couple weeks ago. I did some homework on it and apparently it's not difficult to remove the copper, I think, with a sulfur base(?). Neat science project. Just to echo Johns statement, probably nothing more than oxidation/environmental damage.  |
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Bedrock of the Community
United States
73984 Posts |
Environment Damage with Zinc Rot from the Zinc core getting exposed.
Errers and Varietys.
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Valued Member
United States
254 Posts |
U sure it's a 99 and not a 90?because that looks like a Wide AM |
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Pillar of the Community
United States
4398 Posts |
Quote:
looks like a wide AM No it's a Close AM. I agree that it's environmental damage. |
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Valued Member
United States
274 Posts |
Hey cldague, you should clean it real good and keep it. Generally I don't promote cleaning but if it's worth a cent, no harm. I only say that because mine cleaned up really well, it was solid black. People don't mind looking at it, especially the ones that are still under the impression that our pennies are still made of copper.  |
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Bedrock of the Community
United States
62064 Posts |
This looks like an addiction of zinc to the coin? Why do I think that? Note the two bubbles above the dat area. How could those get under the zinc? It couldn't. But they can appear under plating. So zinc was added to the coin.
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Bedrock of the Community
Australia
21786 Posts |
The obvious inference from coop's comment is zinc plating over the copper plating. The picture suggests that, around the rims.
Most probably a high school lab. job.
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Pillar of the Community
United States
3641 Posts |
It's a high school lab experiment (which is probably the best use for a Zincoln).
Stripping the copper plating is easy. It can be done by reverse plating with distilled water and Copper Sulphate, attaching the coin to the anode, rather than the cathode. Jarden Zinc plates the cent blanks with a double thickness plating on the edge and a single thickness on the faces. That would explain the residual copper on the edge of this coin, especially if the reverse plating used low voltage, such as a battery.
As thin as the copper layer is on the obverse and reverse of the Zincolns, a short bath in Ammonium Persulfate or Ferric Chloride would also do the trick, and have similar appearance with the residual copper on the edge.
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New Member
United States
7 Posts |
Just got saw this penny and it looks almost like the picture in the original post. This is a 2001 D coin that appears to have no copper but on the mouth area. Is this environmental damage as well?   |
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Bedrock of the Community
United States
73984 Posts |
CoinNewb8, yes that's Environmental Damage. PSD. Definitely a spender. Errers and Varietys.
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Replies: 12 / Views: 5,826 |
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Posted 05/25/2018 3:47 pm
