What's Up With This 1990 Cent? !! - Coin Community Forum

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Author	Replies: 7 / Views: 1,179
M_d_in_guy Pillar of the Community Canada 1049 Posts	Posted 02/21/2014 7:05 pm I bought a batch of 6000 pennies, a drop jar from a family for years. My scale is not too acurate, the copper 90 came in on it at 2 gms and change lol, the other one did not even register. Is it aluminum perhaps, I read that the U.S. mint did testing of aluminum cents at some point. At a loss here and looking for the pro's help. Thank you in advance. Jon. Report this Post to the Staff

Lyle Kruse Valued Member United States 256 Posts	Posted 02/21/2014 7:29 pm Unfortunately it looks like zinc rot. Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 02/21/2014 7:31 pm Looks like someone altered it with adding zinc to the coin. You can still see the bubbles under the plating, so it was plated. I've seen the video of how to do this on youtube. I don't have the link. If it were an un-plated planchet, the surface would be smooth. Report this Post to the Staff
M_d_in_guy Pillar of the Community Canada 1049 Posts	Posted 02/21/2014 7:32 pm that makes sense Lyle, why tho is it larger in circumference and not registering on my soso scale lol, ty for replying. Jon Report this Post to the Staff
M_d_in_guy Pillar of the Community Canada 1049 Posts	Posted 02/21/2014 7:37 pm Coop, would that cause internal and external edge ridging of the reverse lettering, as such with this coin? Report this Post to the Staff
M_d_in_guy Pillar of the Community Canada 1049 Posts	Posted 02/21/2014 11:14 pm a few more pics, the overall dimension of it is, 20cms or abouts 7/8". All of the rim edge is smooth, so definitely not zinc rot making it larger,and definitely larger than a 1990 minted cent, so perhaps, wrong metal, wrong planchet? Report this Post to the Staff
Lyle Kruse Valued Member United States 256 Posts	Posted 02/21/2014 11:17 pm coop is correct, it was plated with zinc. Edited by Lyle Kruse 02/21/2014 11:18 pm Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 02/22/2014 07:48 am Note on the letters above TES on STATES. You can see the zinc addition on top of the split plating in that area. Report this Post to the Staff
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