It was. (I saw it while it was on exhibit at the mint in 1976.)
Yes they will, of course they reject 90% silver coins as well.
Possibly a chipped working hub.
Double strike on a clipped planchet.
If it is really struck on a dime planchet, I'm surprised at how well struck up the details in the bust and Monticello are. Those require a lot of...
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