Up for your consideration is this fine example of a 1991 Lincoln Memorial Penny Error Coin. It is missing the copper clad. I have added additional pictures as requested. I tried to get different angles and show the coin the best I could.
I tried to post this question by a helpful ebayer, but it wouldn't allow me to post it for whatever reason, so I copied it and added it here. It would help if the coins weight was listed to the third digit past the decimal. The weight rules out it being plated in a white metal (which is a common chemistry project). Technically its not missing the clad layer (different process) it would be missing the copper plating. And better photos of the surface to rule out it being unplated due to reverse electroplating (another common occurrence which makes no sense, but happens as often or more than being played).
Acid soaked Lincolns usually are easier to spot as they have pitted surfaces. Skepticism within the marketplace due to too many fakes keeps the prices lower. Thanks so much for all the interesting information.
I tried weighing the coin, but my scales only show 2.5 grams and I don't know how to get it to the third digit past the decimal, but I will try to get that info. I will also try to get better pictures of the surface of the coin. Was on the high side, but with the best offer feature sometimes the perspective buyers offer much less than hoped for and sometimes much less than the value of an item I will post your information because it is a valuable source of knowledge (of which I have little) of this type of coin. I totally understand there is room for skepticism in the marketplace and I wish I knew more about the coin. It was with a huge coin collection left to my late husband, a collector who passed away some years ago.
I have no idea of value or how to grade the coins and so again, Thank You for your information. The item "1991 Lincoln Memorial Cent ERROR MISSING COPPER CLAD Coin RARE PENNY EXAMPLE A+" is in sale since Sunday, April 22, 2018. This item is in the category "Coins & Paper Money\Coins\ US\Errors". The seller is "gilbe-sher" and is located in Murphy, North Carolina.This item can be shipped to United States.