Opinions Please!

I need to know opinions as to whether this coin is Proof or MS as graded before I send it back for mechanical error. I have asked several coin dealers here in Washington State that seem to think it is an MS. However, there are others including a member of this society who need not respond or be named that believe it to be a proof. Honestly, I've had my doubts as the obverse looks proofish but the reverse looks MSish, especially in the sun. I do not want to waste my money or time sending it in if there isn't a need and definitely don't want to lose a top pop coin unless it really is mislabeled.

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