Your nickel looks to be environmentally toned. I like nickels with that particular appearance. I've set several aside to create an environmentally toned set...coins with a cameo type appearance somewhat like the Black Beauty 1959s. The '59s are the result of annealing whereas your specimen is related to environmental conditions.
Not a black beauty, but another environmentally affected specimen. I have a separate container that I put these into with the aim to complete a set of Jefferson Nickels that have an appearance like the last two you posted. You may want to consider doing the same. The idea was presented to me a few years ago, where another enthusiast put together a set like this. It was actually pretty impressive looking. It's kind of funny how something most of us would toss into a junk pile is given a new perspective by the insight of a person who managed to see the beauty/interest in something 'ugly'. I think it's like the unrestored classic automobile you see on the rebuild shows where they decide against a fresh coat of paint to keep the original weathered patina...including scale rust...on a restored classic. The artists amongst us help us to see and appreciate things.