Thanks for the advice Bill

Where would one go to get it graded? Or is it not worth doing that?

Here is the back

I have this coin, it's a bit rusty is it worth much and I believe cleaning it is a bad idea?
Thanks in advance!

Will do, so there isn't anything special about 12 sided nickels?

Now I also have these nickels I was most curious about the shape being different on the first one

I've been going through my mom's basement and we came across a lot of different coins and I would love some idea of how much they are worth or where to get more info on it as I don't see anything on this website about this particular piece