Nice coin to find!!!
If I were you, I would clean it. Try peroxide, if that doesnt do the job,
try a bath of hot vinegar and salt, but ONLY leave it in for 30 seconds
at a time until you like what you got.
Let us know how it turns out, with cleaned photos, please.
Nice coin. I've been having good luck with lime away and a soft brass brush on my nickels. You can see the one I found in Missoula that I cleaned with this method in my post from yesterday "a week worth of finds".
I think you'll want to experiment with other nickels before you try ANY method on that one...some have had good results with salt and vinegar--but you'll want to be sure to use baking soda afterwards to stop the vinegar reaction!
I'm sure there are threads in the cleaning section.