yes they really are copper dimes
You have what is known as an Unfinished Planchet or Missing Clad Layer error. In the minting process, the blank planchets that coins are minted from are cut from long sheets of metal. These sheets are made of copper. One step in the process is to plate the sheets with the silvery-colored copper-nickel alloy that you see on normal coins. Sometimes the sheets do not get completely plated, either on one side or both. Then when the planchets are cut out of the sheet, they will be missing the plating on one side or both. These unfinished planchets will continue undetected, along the mechanized minting process, to the coin press, and have the design stamped into them -- giving you what looks like a normal coin, except for the copper color on one side or both.
They in no way made copper dimes. There clad dimes with middle copper shade with silver on the two facets. in case you have copper dimes, they're fakes! try using an old delicate enamel brush, moist the coin and scrub it with baking soda. it may come decrease back out silver. it relatively is the secure thank you to scrub funds. My husband has accrued funds for particularly much 50 years.
