I don't think the autograph book surrounding it is helping - realizing that its history could be that someone from Nova Scotia was visiting Boston and only had a piece of paper and pencil when they happened to get the opportunity to have Mantle sign, so when they got home they cut it out, bought the book and glued it it. Still, not the best.
I don't like pencil cuts like this, especially when decent 1953-ish Mantles can be found, but since you are asking about enhancing a sale, I would send it to SGC, as they will put it in a holder and it will look more attractive. Or they will reject it.
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