1985 Denver Minted Lincoln Cent Repunched Mint Mark / RPM ? How To Clean?

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Author	Replies: 9 / Views: 942
Bezo816 Valued Member United States 131 Posts	Posted 07/11/2018 2:10 pm While CRH I found this 1985 D Lincoln Cent with what appears to be an RPM. The problem is that there is corrosion...Is it a RPM? Also, would anyone know of a way to clean this coin to get a better idea of what is going on? As always, thank you for your help. Report this Post to the Staff

John1 Moderator United States 56855 Posts	Posted 07/11/2018 2:12 pm Not an RPM. It is zinc rot. Spend it don't clean it. John1 Report this Post to the Staff
Bezo816 Valued Member United States 131 Posts	Posted 07/11/2018 2:18 pm It's not rot, I don't think, there is metal there. I was trying to clean it a bit with a toothpick, and there is a metal ridge. Does rot make a ridge? Heck I don't know...thanks though. Report this Post to the Staff
Tanman2001 Pillar of the Community United States 4404 Posts	Posted 07/11/2018 2:58 pm Zinc rot can push the copper plating up and form a ridge like that. Just zinc rot, not a RPM. Report this Post to the Staff
Errers and Varietys Bedrock of the Community United States 74716 Posts	Posted 07/11/2018 3:47 pm It's just Zinc Rot, not an RPM. http://www.error-ref.com/zinc-deter...ncoln-cents/ Errers and Varietys. Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 07/11/2018 3:50 pm During the strike the copper plating gets split, then the zinc underneath get oxygen and it all down hill from there: We see this every day here. Report this Post to the Staff
Errers and Varietys Bedrock of the Community United States 74716 Posts	Posted 07/11/2018 3:56 pm This happens quite a bit. It's very common. Errers and Varietys. Report this Post to the Staff
SilverDollar2017 Pillar of the Community United States 8715 Posts	Posted 07/11/2018 4:09 pm It's zinc rot. Spend it before it turns into a discombobulated piece of metal. Report this Post to the Staff
Coinfrog Bedrock of the Community United States 94367 Posts	Posted 07/11/2018 4:43 pm Yep. Report this Post to the Staff
Bezo816 Valued Member United States 131 Posts	Posted 07/11/2018 8:20 pm My apologies...I didn't realize it could push metal up...THAT'S CRAZY!!. I might keep it as a science experiment, and see how bad it can get. Thanks again! Report this Post to the Staff
	Replies: 9 / Views: 942

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1985 Denver Minted Lincoln Cent RPM? How To Clean?