I'm no expert but believe a coin can't be minted with one side struck. Probably someone machined it smooth.
Sorry but the reverse was milled off. The obverse rims also suffered some abrasive damage. It's not an error.
Yep.. DEFDAM - Definitely Damaged. Altered Reverse done post mint Suggestion.. Post in the Error Coins forum just like you did with your other two threads. Welcome to CoinTalk
maybe worked on to be mounted on a keychain or encased as a luck charm. the obverse rim looks weird, for sure that isn't "as struck" by the mint. post mint damage.
since the wear is on both sides to some degree could have been caught in a machine like washer or dryer and worn down. Not an error. just damaged
I'm no expert either, but doesn't a uniface error only have 1 side struck? I think it happens when 2 planchets are struck together. Just to be clear I'm not suggesting this happened to the OPs coin, it looks filed down to me too.
Inter Interesting. I had never heard of a uniface/trial strike before. One learns something new every day. A uniface is a reference to a one-sided Coin or Banknote, usually issued in low denomination, in times of war or in the early evolution of coins and banknotes; other examples are made as trial strikes of dies.
http://www.error-ref.com/full-uniface-strike/ I still think it was worked on after minting and encased into a keychain or something. the only way there would be a "uniface trial strike" is if the mint purposely loaded a blank hammer or anvil die. This just doesn't happen with the U.S. mint, they either use the actual dies to set the press for good strikes, or they use the Martha Washington/mount vernon fantasy trial dies to play with different testing materials. the most common way for Uniface to occur from the u.s. mint is two blanks fed lined up into the press and struck. I don't know what it's called, but when a coin is ejected and another is fed and neither seat and over lap and both get part of the strike together... like that, but perfectly stacked when it happens, two coins fed at the same time and lined up.