Grade review question for the experts or anyone who knows.........

I have never used the service before so please excuse my ignorance
I have a 1939 Proof Jefferson in a rattler 65 holder with a Gold Bean on it. I'm convinced it's a 67. Can I send it for a grade review and specify min. grade of 67 or don't crack it????? Thanks in advance!

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Comments
-Paul
In honor of the memory of Cpl. Michael E. Thompson
yeah I just want to see a picture of a nice early jeff proof. sue me.