Hi cudamark and enamel7, Some clad coins have been made by the Mint, with planchets that didn't have the copper-nickel plating. They slipped past the inspecters and are quite rare. And the size is right.
If you watch that video, it says that some planchets, from different coin, get stuck in the presses nooks and crannies. Then when they switch from dimes to cents (or whatever to whatever), one of the stuck disks may fall into the press. They are VERY RARE.
And I am sorry that some folks thought that I was trying to convince Mind, or anyone else, that this dime was solid copper and super valuable. If it shows any of the copper-nickel plating, It is not solid or rare.
All I am saying is that real, 'solid' clad coins, are worth identifying.
And, for example, there were 1,163,000 1998 P dimes made. And for the sake of argument, if 50 of them were unplated and went into circulation,
it is possible that any of them could wind up in the ground for one of us to find...and be a Dug Coin
Happy New Year.