I just found this in a bunch of (kinda crappy) buffalos and
V nickels I bought on
ebay for 60 cents each. It's worn almost smooth but in my hand, I'm pretty sure it's an 1886. The 6 is tough to see in the picture but I think that's mostly due to bad photography. The back is worn almost smooth. I think the black stuff is residue from a piece of tape (also on the back).

I have a slabbed FA 2 1886 nickel and it has much better detail than this one so I'm guessing it'd grade a 1 (or 0.5?). What do you think it's worth?