I had never heard of this until I googled “black nickel”. Is it true that the rim or side should be the same color as a normal nickel? Thank you in advance
http://www.error-ref.com/improper-annealing/ Nope that's just environmental toning.Yes your right If it was a improperly annealed planchet the (edge) would look white and clean like the coin itself,still 5 cents.
http://www.error-ref.com/improper-annealing/ The first link doesn't appear to work so here's another one.Also other factors exist to tell if its improperly annealed besides the edge.It usually effects both sides of the coin and can have tons of appearances and looks.Read the info on the link and if you think you've found one.Just post it here to confirm because it could just be damage.
"The edges of an improperly annealed planchet (according to Fred W.) should look like a normal coin. Annealing only affects a thin surface layer of the metal."
