You found this in a bank roll? Remarkable.Zero wear it appears to me.
Ok, I would say MS-66 or even MS-67 on the features, but the luster (judging by this photo) seems to be impaired (this is a quote straight out of Whitmans Red Book, page 9 2012 version "Condition of Coins) so MS-63.
Please do NOT attempt to clean this coin, unless you want to ruin it!
I am a newbie, so I could be wrong, but I do have a war nickel that is MS-66 and the luster as well as all the features are nearly perfect and it reflects like a mirror.
IF I am wrong, please tell me why, I wish to learn. If quoting the Red Book is a bad idea, why?