Error 1930 or 1920 penny

I found this penny in a roll of wheat pennies I bought. I can't tell what the date is but it is either a 20 or 30.
Can anyone tell me what type of error this is? Is it worth anything? Is it an actual error?

Any help would be appreciated.

Thanks!

Todd

 

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I'd say post mint damage, but can't tell the date.