This coin was also posted on the Error Coin Information Exchange. Here's the answer I provided: I have three dimes struck by this malfunctioning press. It now looks like the press struck several others. I wrote an article about them many years ago for Errorscope. As best as I can tell, three hard objects stuck to the perimeter of the obverse die and impaled a dime planchet. This became a die cap and struck a succession of other planchets. Alternatively, the junction between the neck and face of the obverse die was damaged in three spots, which raised up a burr in each spot and these impaled the planchet. The hard objects or burrs also chipped the periphery of the reverse die in the same spots, presumably when a planchet wasn't fed into the press and prior to the creation of the die cap. This created corresponding reverse cuds. All the strikes are quite weak, although the extent of weakness varies. All seem to show a misalignment of the obverse die together with its cap (the brockage and die-struck reverse design are not perfectly aligned). It seems all the planchets were struck out-of-collar and slightly off-center. The thin curved groove on the obverse seems to be a struck-through error, perhaps a wire or a metal shaving that stuck to the working face of the die cap. This is a unique press malfunction that produced a series of dimes of surpassing strangeness.
