Well the mint mark is a normal one. If it were a variety, it would be called a RPM. (Re-Punched-Mint mark) Looks more like a contact mark. The overall shape of the mint mark is there. A RPM would show a spread on split serifs on the corners of the 'S' or 'D'.
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Closer view. Note the splits on the upper serif?

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Closer view. Note the splits on the upper serif?

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