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 Replies: 9 / Views: 1,875 |
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New Member
Canada
35 Posts |
I am going through a large collection of cents and came across this coin. It is thinner and lighter than cents of that date. It weighs 1.96 grams instead od the 3.26 it should and seems to be 60-70 percent of the correct thickness. The diameter seems correct. Has this been subjected to some form of post mint trauma or could it be a wrong planchet. The markings are faint but I didn't know if this was due to the thin planchet or the coin being subjected to something. New to me so any thoughts or expertise would be appreciated. Thanks.    |
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Bedrock of the Community
Canada
21589 Posts |
May have been acid dipped.
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Pillar of the Community
Canada
1618 Posts |
PMD.
Looks to me like it was dipped in acid; the lettering is thinner and would also explain the thinner planchet size.
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Pillar of the Community
 Canada
5585 Posts |
I agree ... acid dipped. Maybe a HS experiment.
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New Member
 Canada
35 Posts |
Thanks for the help. That makes sense. I was just surprised how much lighter it was. Appreciate you help and I learned something.
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Valued Member
Canada
71 Posts |
I know this was posted many years ago but I just happened to come across an identical 1939 thin planchet! Weighs in at 2.2g. Not sure I buy the acid cause - would explain the rough surfaces however the rims/edging is very smooth and shiny. Will try to attach my photos and maybe start a new thread to grab more attention. Your thoughts please!    / |
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Pillar of the Community
Canada
5585 Posts |
It's another acid cent. In high school labs years ago, you could do this just by leaving a penny in a glass/can of Coke, and changing it ever so often.
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Moderator
 Australia
16810 Posts |
Sorry, but both your coin and the OP coin are acid-soaked or, as noted above, a "Coca-Cola coin". They have all the symptoms:
- Thinner planchet
- Lighter weight
- Slightly smaller diameter.
- Porous surface
- "Sharper" details
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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Bedrock of the Community
United States
73844 Posts |
I agree. Both of the coins have been damaged by acid. PMD. Errers and Varietys.
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Bedrock of the Community
Canada
21589 Posts |
Not a thin planchet, been soaked in acid.
If it was struck from a thin planchet, the surfaces would be smooth, not pitted.
Edited by JimmyD
07/12/2025 07:45 am
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Replies: 9 / Views: 1,875 |
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Posted 03/18/2019 9:12 pm
