I meant to tell you based on what I read sometime a coin can be missing clad on both sides and it's run through the machine and somehow it comes out the same size as the other coins and the same weight that's what I read
@Popcornman Where did you read this? You maybe read it wrong. It does not sound right. Believe me, 31 years of collecting Mint Errors.. what you stated is improbable for a Dime. There is another Mint Error that is probable. It's name an Improperly annealed Planchet.
To apologize to you for giving you the wrong information on that dime the information that I have I got from Sullivan's numismatic post 603 believe it or not I have a brown 1987 Roosevelt dime that's copper color on both sides I can see the silver on both sides also. The other coin that I have is copper colored on both sides the complete coin is copper color no silver anywhere thickness is the same as a regular dime weight is the same as a regular dime and is in excellent condition. I can clearly see that the one has been in the ground are chemically treated the other is so beautiful it's extremely doubtful no Nicks no scratches what do you think?
I also have a 1964 copper penny that has a shiny finish like a proof coin but it's not mirror like. It has Square Sharp edges the Finish is satiny. It has no scratches or dents. If you look up 1964 special mint penny it will give you a description of the special mint pennies that are believed to be prototypes. The penny that I have fits the description and the criteria . From what I read they only have certified 22 of them. I also have a 1927 special strike nickel. There's only five of them that was meant it. Most people have never heard of either one of these coins. I don't know how to send pictures. Hopefully I can find someone that would be willing to show to show me how to post pictures that's why I'm describing them to you rather than sending a picture. Tell me what you think. The 1927 special strike nickel has a die mark at the eight position on the back by the buffalo. It also has micro cracking. Most people even coin dealers have never heard of these coins. I would appreciate it if you would look them up and read the descriptions and let me know what you think thank you very much. I know your time is valuable to you and believe me I'm not trying to waste your time.