1866 3CN with die breaks and die chips
Found this one while looking for clashed dies on three cent nickels online. Could not resist when I saw all the effects of a deteriorating die had on the coin. Presently in a PCGS AU58 slab (no attribution). The site said it was a TCNC-1866-8R.
Special thanks to @yosclimber for sharing images of the 1866 that lead me to this coin.