Might be the forked tail what mint did it come from I'm guessing philly..if so maybe a forked tail but there is several DDO 63p dimes check variety vista both the imaged and the coneca files ya may have a good one!!
The notch on the inside of the "3" is on all 1963 dimes. Other years have this notch on cent also. Always check other examples to see it is common that year.
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