There are several possibilities, based on your description:
- A "missing clad layer" error, as you've speculated.
- A "wrong planchet" error, where the coin is actually struck on a penny planchet.
- A perfectly normal dime that has been electroplated with copper after it left the Mint. This would be a "damaged coin" and not an error.
- A perfectly normal dime that has been environmentally stained to appear coppery.
Things that will help us ascertain what you've got:
- Pictures, of both sides and ideally of the edge too.
- A weight, ideally in grams to two decimal places.
- A "missing clad layer" error, as you've speculated.
- A "wrong planchet" error, where the coin is actually struck on a penny planchet.
- A perfectly normal dime that has been electroplated with copper after it left the Mint. This would be a "damaged coin" and not an error.
- A perfectly normal dime that has been environmentally stained to appear coppery.
Things that will help us ascertain what you've got:
- Pictures, of both sides and ideally of the edge too.
- A weight, ideally in grams to two decimal places.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis



















