Die Deterioration doubling. Worthless doubling. Nothing at all to do with a true Doubled die variety. You will probably find a million examples of worthless doubling before you find a true Doubled die.
@meandyou4ever0 the 2015P dime had a lot of worn die issues. When they first came out, I saved some then realized it was a worn die problem. They are all back in circulation now except maybe one I kept as an example>
Here is the classic, the 1955 doubled die obverse cent. The Philadelphia Mint personnel did not catch this until they are bagged a large number of cents with these pieces mixed in. Instead going through all of those coins to find them, they just released the bags. A large number of these coins cropped up in New England. I knew man at one of the clubs to which I belonged, who said that he and his father found more than ten of them. They weren't worth much for a few years. They were added to the Red Book listings in 1959. From then on the prices have been onward and upward, especially for pieces with a lot of mint red.
