Hi, Just4Fun. I'd agree with the others that this coin has some form of "post mint damage" meaning that it came from the mint as a normal nickel, but something has happened to it along the way that resulted in the damage you see. The coin has no value beyond face, because this damage happened after the coin was put into circulation.
A lot of the fun of coin collecting is learning how to differentiate between and among all the different things that happen to a coin from the making of the planchet from which to coin is struck, to the minting process and ultimately throughout the time it circulates. As a rule-of-thumb, anything that happens to the coin once it leaves the mint diminishes its collector's value because we could take any coin and replicate the general condition. Things that happen at the mint to make a coin unusual tend to add value because those things are rare and unrepeatable by those of us in the general public.
best wishes